Search Results for: floor sawing
Projects
Some Of Our Most Recent Projects:
London City Airport - (BAM Nuttall)
CA Drillers worked with BAM Nuttall to deliver concrete cutting and sawing services for the airport's development project. Our job required precise operations in challenging locations, which we achieved on time and with high-quality results, earning us to be shortlisted for an award by The International Association of Concrete Drillers & Sawers.
Due to tight schedule constraints centred around the piling contractor, a daily requirement existed for cutting 80 linear metres (600 mm / 700 mm deep). To meet this demanding timeline, we had to consider installing 40 metres of track at a time with two saws operating concurrently. This was achieved while working from a barge and implementing rigorous water management measures to contain the substantial amounts of water/slurry generated, as, for environmental reasons, it was imperative to prevent contamination of the water within The King George V Dock.
Our cut line was positioned 200mm above the water level, adding significant complexity, particularly since we had to cope with the constant motion of the working barge. Another challenge we faced was that the protective measures used had to be removable daily to accommodate the arrival of the night barge, which was tasked with lifting the cut concrete sections.
Our final solution involved the installation of a 150mm steel guttering system beneath the cut line. This system was installed in 20m sections in both directions, each with a very slight incline, leading into a specially designed container. The resulting waste water/slurry was then pumped into 1000-litre IBC containers located on the barge. These were removed each evening for recycling through a silt buster.
Ardmore Construction - The Old War Office
CA Drillers team were involved in the esteemed restoration project at the historic Old War Office, an iconic site nestled in the heart of Westminster. As the project progressed, our team expanded, reaching a robust strength of 60 skilled operatives during its most demanding phase.
Our extensive scope of work showcased our versatility and expertise in a variety of challenging tasks. This included the diamond drilling of substantial sump pits in the basement areas, complemented by the advanced use of Brokk demolition robots for efficient break-out operations. In the swimming pool area, we undertook precise core drilling to accommodate lighting installations, blending functionality with aesthetic considerations.
Furthermore, our team formed builders' work openings, employing both hand saws and track saws, coupled with stitch drilling techniques to avoid overcutting. Followed by the installation of lintels was carried out with across all levels, reinforcing the framework of the building. In adherence to stringent health and safety measures, we implemented control measures in our work areas which included full tent enclosures, chapter 8 barriers for demarcation, and dust cubes for effective extraction of any dust generated during our operations.
Our responsibilities also extended to complex tasks such as forming rainwater pipes, a challenging process that began at the roof and involved cutting and breaking through walls and slabs, down to the fourth basement level. Additionally, we were tasked with the intricate chasing of electrical conduits within the ceilings, slabs, and walls throughout the entire building.
A particularly challenging aspect of our work involved the wire saw removal of steel-plated, bomb-proof walls encircling the building. The scale and diversity of our work package not only demonstrated our technical prowess but also our dedication to preserving and enhancing a building that is a symbol of British heritage. CA Drillers takes immense pride in having played a pivotal role in the restoration of this venerable landmark, contributing to the conservation of its rich history and architectural grandeur.
Riverlinx CJV (BAM Nuttall Joint Venture) - Silvertown Tunnel
CA Drillers' first project involved the deconstruction of the river wall. This challenging task required the implementation of vertical stitch drilling from the landside to sever the wall into detachable sections and subsequently be lifted out by the aid of Riverlinx machines. To ensure the River Thames, located underneath, remained free of slurry produced by the drilling and sawing, strict water and slurry control measures were employed.
Following that, we performed a series of operations on multiple areas on site. We have carried out floor sawing activities critical for initiating the open-cut procedure of the tunnel's construction. Wire sawing was also conducted on existing UAE structures. Furthermore, we carried out a large quantity of pile cropping, we trimmed the pile tops to the necessary height using an effective combination of track sawing and Brokk demolition. It was essential that we was to retain the rebar within and not cause any damage, therefore the track sawing and Brokk activities was carried out with due diligence as to negate affecting the integrity of the rebar.
In addition, we was awarded the scope of works to demolish the Victorian dock wall which obstructed the trajectory path of the tunnel. For this, we employed a Brokk 400 & Brokk 800, to carry out the heavy-duty demolition task. More recently, we were involved in the headwall cut and carve operation. This operation was vital to prepare for the Tunnel Boring Machine (TBM)'s departure from Silvertown to Greenwich. This stage was a pivotal moment in the project, as it is when the TBM made its initial breakthrough at Greenwich after setting off from Silvertown, effectively forming the initial tunnel wall. In order to facilitate the Tunnel Boring Machine (TBM)'s successful exit, we employed a drilling and sawing approach.
This involved creating a series of drill holes around the circumference of the TBM machine and making vertical track saw cuts. The primary aim of this intricate operation was to weaken the structural stability of the wall. By doing so, we enabled the TBM to successfully penetrate and bore through the wall. This operation required meticulous planning and flawless execution, all of which were crucial in ensuring the TBM's successful journey to Greenwich. We was provided short notice and time frame to start and complete. We received the phone call on a Friday with the intent to mobilise site on the Sunday and all works completed within the time frame of Wednesday. This achievement was a testament to our team's dedication, expertise, and commitment to delivering high-quality work on schedule. (Please see pics below of the headwall cut and carve).
BAM Construction - Space House
At the onset, C A Drillers undertook specific assignments for the Space House project, which included making track saw cuts on 48 concrete T units within PAYE's yard. These intricate tasks demanded heavy-duty cutting and drilling. Each unit required a 3m x 450mm deep track saw cut, a 3m x 750mm deep track saw cut, and a central stitch drill to separate the 3m x 750mm x 450mm section.
Once cut, these units were lifted by the on-site crane and redistributed. Due to certain time restrictions, PAYE made accommodations for additional T units in the yard, consequently amplifying the productivity expected from CA in order to ensure compliance with the project's schedule. Despite these demands, the team completed the tasks within the set timeframe. Following this initial phase, CA relocated to the Space House site where they were tasked with trimming back lift shaft slabs and executing necessary concrete repairs. Considering the tasks were to be carried out within a lift shaft, operatives ensured the implementation of adequate safety measures to mitigate risk from falling debris.
Activities within the lift shaft were managed with multiple layers of corex to reduce the amount of debris. This careful breakout of the slab also allowed for efficient debris clearance. Additionally, the concrete repair works within the lift shaft were thoroughly documented by the C A site manager through quality assurance documents. These were countersigned by BAM management to verify that all repairs were conducted to their specifications.
In the subsequent stages, C A has carried out a host of diverse tasks around the site. These tasks range from prepping the floors throughout the entire building, lowering the slab level to assist the screed applicators in their work, employing our Brokk robots to chip away at the screed in B2, stitch drilling riser openings across every floor, and creating numerous openings and core holes through both the slab and wall for M&E and ductwork facilitation. Our team continues to work diligently on site, delivering high-quality results and readily accommodating the site team's requests, irrespective of the given time constraints. For quality control and safety assurance, our contracts manager and health & safety manager conduct either weekly or bi-weekly site visits, undertaking on-site briefings and carrying out safety walkarounds with the C A site team.
FM Conway – The National Art Gallery
CA Drillers were entrusted with a prestigious project at the National Art Gallery for our valued client, FM Conway.
The task involved removing approximately 250 m² of reinforced concrete slabs, each around 300 mm thick, along with a 6 m² wheel wash area up to 2.5 m deep and an old BT chamber of similar size extending to a depth of 3 m.
The challenge of this project lay not only in the depth of the slabs but also in working within an environment housing priceless artwork. To ensure the utmost care, all work was carried out using non-percussive methods to prevent vibrations and disruptions.
Our team utilised advanced equipment, including diesel-powered floor saws, diamond track saws, and precision diamond drilling tools.
Throughout the project, vibration levels were closely monitored by the gallery’s team, ensuring the safety of the artwork.
CA Drillers successfully managed and completed the project on time and within budget, demonstrating our expertise in precision slab removal.
It was a privilege to contribute to such a prestigious project and showcase our capability in delivering meticulous, non-percussive concrete removal solutions.
Tottenham Hotspurs FC - Keltbray
CA Drillers played a pivotal role in the first phase of the demolition package, working in collaboration with Keltbray as part of the enabling works for the construction of a prestigious new hotel at the Tottenham Hotspur football ground.
Our scope of work involved precision saw cutting of approximately 700 linear meters of reinforced concrete, spanning slabs at ground level, lower ground, and basement. These slabs ranged in depth from 600 mm to 1 meter, with substantial supporting beams extending up to 2.5 meters thick.
This project posed unique challenges, as it had to be meticulously coordinated around the busy schedule of Tottenham Hotspur Stadium, which regularly hosted Premier League and European football fixtures, along with a diverse range of high-profile events. Maintaining progress while ensuring minimal disruption required careful planning and adaptability.
Labour fluctuated between 2 to 10 operatives, depending on the release of works, but our highly skilled team remained agile and efficient throughout. We employed precision cutting techniques, including track sawing, stitch drilling at corners to prevent overcuts, wire sawing, and plunge wire sawing. With up to eight operatives on-site daily over a 12-week period, we successfully completed the works on time and within the programme, demonstrating our expertise in complex demolition projects.
Erith Group - 105 Victoria
CA Drillers worked on a significant project at 105 Victoria, working in closely with the Erith Group to safely perform a variety of demolition tasks, including intricate cut and carve operations. This includes the stitch drilling of pile openings to a depth of 1.5 meters and the subsequent lifting of large segments using A-frames.
We also carried out track sawing to form trenches that are 1 meter deep, which were then efficiently broken out using a pair of robust Brokk 400 machines. Our expertise extended to diamond drilling, creating 600mm diameter holes to a depth of 600mm, which was then broken back to create slots for the installation of new steel wailers.
Additionally, we have undertaken tasks involving track sawing for creating corner holes and employing Brokk machines for demolishing sections of a small roof. Furthermore, the operatives used the specialised munching jaw and sheathe attachment of the Brokk machines in removing the roof, effectively reducing the risk of flying debris and limiting vibration transmission through the structure.
Our ongoing efforts include extensive track sawing and floor sawing in the basement levels' structural slab. This range of work undertaken at the site reflects our standing as a leading specialist drilling and sawing company, particularly skilled in cut and carve techniques. This assertion is supported by our track record on this project.
Erith Group – The Bermondsey Project – The Former Biscuit Factory
CA Drillers were engaged by Erith Contractor Ltd to provide saw-cutting and core-drilling services as part of the demolition works at the Former Biscuit Factory site. With years of experience in precision cutting and drilling, CA Drillers played a vital role in ensuring the project was executed efficiently, safely, and within the required specifications. This case study highlights the scope of work carried out by CA Drillers, emphasising the impact of their expertise on the project's success.
The demolition of the Former Biscuit Factory involved complex cutting and drilling processes to prepare the site for redevelopment.
One of the key aspects of the project was dowel hole drilling, which involved drilling 7,914 dowel holes at foundation level into concrete pads. This process was crucial for structural reinforcement and ensuring the integrity of future construction work.
Another critical task was track sawing, which allowed for the cutting of reinforced concrete slabs. This method was essential for creating new openings and making structural modifications in line with the demolition plan. Additionally, wire sawing was employed to reduce pile caps and pad foundations. This technique ensured controlled and efficient removal of heavy concrete sections without causing unnecessary disruption to surrounding structures.
In support of the demolition process, beam and column cutting was carried out with precision saw-cutting techniques. This facilitated the safe and effective removal of structural elements. Furthermore, high-level concrete removal was performed using powered access equipment. The process involved saw-cutting and breaking overhanging concrete nib sections at height, which required skilled execution to maintain safety and precision.
In addition, CA Drillers contributed to foundation and ground floor modifications by performing saw-cutting to accommodate new underground drainage systems. This was a critical aspect of the project, ensuring that the site’s infrastructure could be adapted for future development. Lastly, diamond drilling was carried out to create core drill holes for BWIC (Builders’ Work in Connection) service penetrations. This allowed for the seamless integration of mechanical and electrical (M&E) services into the site’s redevelopment plan.
Project Impact and Conclusion
The expertise of CA Drillers ensured that all cutting and drilling operations were executed with precision, meeting the required safety and structural standards. By utilising advanced diamond drilling and saw cutting techniques, CA Drillers contributed to an efficient and controlled demolition process. Their work not only facilitated the safe deconstruction of the Former Biscuit Factory but also played a crucial role in preparing the site for its next phase of development.
The success of this project underscores the importance of specialized contractors in large-scale demolition and redevelopment efforts. With a commitment to precision, efficiency, and safety, CA Drillers continue to be a trusted partner for complex cutting and drilling projects across the construction industry.
MACE – Woolgate Exchange
CA Drillers were engaged by Mace to deliver the Builder’s Work in Connection (BWIC) package, playing a crucial role in facilitating the construction process. As the project evolved, their involvement expanded to encompass a variety of specialized tasks aimed at ensuring the seamless execution of the development.
One of the primary aspects of their work included soft demolition and strip-out operations. This involved the removal of existing high-level beam finishes, including insulation as well as the dismantling of redundant rainwater pipes. These preparatory works were essential in clearing the way for new structural and service installations.
Another key component of their scope was the formation of openings, which entailed the creation of gulley openings and the installation of new gulleys. Additionally, overflow openings were formed to enhance drainage efficiency. A particularly intricate task involved cutting approximately 110 castellations, comprising various shapes such as holes, squares, and rectangles, through high-level beams to accommodate service routes.
Further contributing to the structural preparation, CA Drillers undertook steel beam polishing within the atrium area, ensuring the beams met the required aesthetic and functional standards. Additionally, they were responsible for drilling operations necessary for the installation of earthing pits, a critical element in electrical grounding and safety.
Specialised diamond drilling was also carried out to facilitate service penetrations within the BWIC package. Furthermore, CA Drillers managed infill works, particularly in concrete applications, to support structural modifications and ensure stability.
The team played a significant role in in-situ concrete works, constructing gantry bases, encasing columns, and pouring lift pit bases. These activities were vital in reinforcing the structural framework of the building. Their expertise extended to structural steelwork, where they were responsible for the fabrication and installation of new beams and columns, contributing to the overall integrity of the construction.
To maintain safety and stability during the works, CA Drillers implemented back propping measures, providing temporary structural support where necessary. Additionally, they carried out scabbling and planning to prepare surfaces for further construction activities, ensuring precision and adherence to project specifications.
Through their extensive range of capabilities and commitment to high-quality execution, CA Drillers played a pivotal role in supporting the successful completion of the project.
Morris & Spottiswood Ltd – 33 Old Broad Street
CA Drillers were engaged to execute the builders' work package in collaboration with Morris & Spottiswood as part of the major refurbishment and CAT A/B fit-out of 33 Old Broad Street. Their responsibilities encompassed a wide range of tasks essential for structural modifications, service integrations, and overall site efficiency.
A significant aspect of the project involved creating vertical and horizontal openings through brickwork, blockwork, and reinforced concrete to facilitate service installations and access routes. This was accomplished through precise saw cutting and stitch drilling techniques. To ensure the structural integrity of block and brickwork penetrations, CA Drillers also supplied and installed prestressed concrete lintels. Additionally, core drilling was carried out in both vertical and horizontal orientations to form penetrations for various building services.
Another crucial responsibility was the installation of a temporary propping system to support the loading bay, allowing it to accommodate bulk deliveries safely. Furthermore, CA Drillers played a key role in constructing reinforced concrete plinths, which included the supply and installation of shuttering, concrete pouring—either by hand or pump—power floating, and the final striking off of the surfaces.
The scope of work also extended to soft stripping, which involved the removal of redundant services, tiling, and steelwork. Where required, block and brickwork infills were installed to seal redundant openings. To seamlessly integrate the building’s utilities within its structure, vertical and horizontal chases were formed.
Beyond these specialized tasks, CA Drillers provided general labour across the site to maintain tidiness and assist with the relocation of equipment and materials as needed. Additionally, they managed the supply and organization of skips, ensuring that waste materials were efficiently removed and that the site remained clear of debris.
Through their expertise and meticulous approach, CA Drillers played a vital role in facilitating the successful completion of the refurbishment project at 33 Old Broad Street.
Crossrail, Plumstead to Paddington - £2.5m
Crossrail is building the Elizabeth line - a new railway for London and the South East, running from Reading and Heathrow in the west, through 42km of new tunnels under London to Shenfield and Abbey Wood in the east. The Crossrail project is Europe's largest infrastructure project with a value of £15.4bn.
CA Drillers started works within the newly constructed tunnel in June 2016. Our initial scope was to complete some intricate cutting works within a cross passage and then complete with a concrete repair. Our works quickly escalated to drilling 1000’s holes for cable containment, fire mains and the emergency walkway system to track sawing 100’s of meters of reinforced concrete to the management and overseeing the installation of 955m2 of the screed. Over 50,000 manholes were completed on-site without a single incident or accident giving us one of the best health and safety records on the project.
Ardmore Construction, 10 Trinity Square, London – £1.7m
The former Port of London Authority headquarters at 10 Trinity Square has been reborn as the Square Mile’s first “super luxury” hotel and residences. The grade II* listed building and three-acre site next to the Tower of London in the City was formed into a 120-bedroom hotel with 37 private apartments designed by David Collins, as well as an exclusive private members’ club, three restaurants and a spa.
CA Drillers aspect of the works involved controlled demolition using Brokk robotic machines, diamond drilling, diamond wire sawing & diamond track sawing. From demolishing the entire basement swimming pool to 1000’s holes across the site all works were completed to our usual high standard.
Mace – Chelsea Barracks - £800k
This site in the City of Westminster was originally owned by the British Army. The £3bn development won local-government approval in 2011 to develop almost 450 homes, stores, a health centre and leisure facilities on the 13-acre site which is due for completion in 2024. Buyers of some of the homes sold are reported to be paying £4500 per square foot which makes these properties some of the most expensive in London! The size and logistics of this vast project were always going to be one of the main challenges on this flagship job.
To ensure our service was up to our high usual standard, we set up an office and stores on site so that we always had the manpower and equipment to complete all required works. From our initial start in May 2016, we completed a wide variety of services on this project ranging from diamond drilling for pipework and ductwork, diamond track sawing for lift shafts to using Brokk’s to demolish concrete piles.
Costain – Paddington New Yard on behalf of Crossrail – £500k
We started working on this site for Costain on behalf of Crossrail in August 2014 and completed our works in November 2018. Paddington New Yard, located between the Westbourne Park Tube station and Paddington National Rail station, contains both the Royal Oak Portal and Westbourne Park Crossrail worksites.
The contract included the construction of a new 180m long elevated bus deck which connected Westbourne Park Bus Garage, the relocation of an existing concrete batching plant, and preparatory works for the installation of new rail track and associated systems for Crossrail in Paddington New Yard. Due to the majority of the site running over the Crossrail tunnel, heavy breaking was not allowed due to vibration concerns. A large amount of concrete required removing which was completed using diamond floor sawing, diamond track sawing and hydraulic bursting techniques. Works were completed on time and on budget.
Erith Contractors, 15 Bishopgate, London – Value £250k
Part of the Tower 42 Estate, this high-quality mixed-use development replaced and expanded the existing accommodation and enhanced the public realm. 15 Bishopsgate provided a six-story office building with retail at ground and basement level that edged the re-landscaped public areas. We were heavily involved with the enabling works on this project due to the sensitive nature of existing buildings with vibration being kept to a minimum.
Areas that would usually be broken out with heavy machinery were track and wire sawn into manageable sections before being removed from the site. Inverted track sawing was engaged due to access issues along with cutting through 800mm deep heavily reinforced concrete. All works ran smoothly with 2 track saws and 1 wire saw permanently on-site to ensure we could react quickly to any last-minute requests.
CA Drillers Case Study
London City Airport - (BAM Nuttall)
CA Drillers worked with BAM Nuttall to deliver concrete cutting and sawing services for the airport's development project. Our job required precise operations in challenging locations, which we achieved on time and with high-quality results, earning us to be shortlisted for an award by The International Association of Concrete Drillers & Sawers.
Due to tight schedule constraints centred around the piling contractor, a daily requirement existed for cutting 80 linear metres (600 mm / 700 mm deep). To meet this demanding timeline, we had to consider installing 40 metres of track at a time with two saws operating concurrently. This was achieved while working from a barge and implementing rigorous water management measures to contain the substantial amounts of water/slurry generated, as, for environmental reasons, it was imperative to prevent contamination of the water within The King George V Dock.
Our cut line was positioned 200mm above the water level, adding significant complexity, particularly since we had to cope with the constant motion of the working barge. Another challenge we faced was that the protective measures used had to be removable daily to accommodate the arrival of the night barge, which was tasked with lifting the cut concrete sections.
Our final solution involved the installation of a 150mm steel guttering system beneath the cut line. This system was installed in 20m sections in both directions, each with a very slight incline, leading into a specially designed container. The resulting waste water/slurry was then pumped into 1000-litre IBC containers located on the barge. These were removed each evening for recycling through a silt buster.
Ardmore Construction - The Old War Office
CA Drillers team were involved in the esteemed restoration project at the historic Old War Office, an iconic site nestled in the heart of Westminster. As the project progressed, our team expanded, reaching a robust strength of 60 skilled operatives during its most demanding phase.
Our extensive scope of work showcased our versatility and expertise in a variety of challenging tasks. This included the diamond drilling of substantial sump pits in the basement areas, complemented by the advanced use of Brokk demolition robots for efficient break-out operations. In the swimming pool area, we undertook precise core drilling to accommodate lighting installations, blending functionality with aesthetic considerations.
Furthermore, our team formed builders' work openings, employing both hand saws and track saws, coupled with stitch drilling techniques to avoid overcutting. Followed by the installation of lintels was carried out with across all levels, reinforcing the framework of the building. In adherence to stringent health and safety measures, we implemented control measures in our work areas which included full tent enclosures, chapter 8 barriers for demarcation, and dust cubes for effective extraction of any dust generated during our operations.
Our responsibilities also extended to complex tasks such as forming rainwater pipes, a challenging process that began at the roof and involved cutting and breaking through walls and slabs, down to the fourth basement level. Additionally, we were tasked with the intricate chasing of electrical conduits within the ceilings, slabs, and walls throughout the entire building.
A particularly challenging aspect of our work involved the wire saw removal of steel-plated, bomb-proof walls encircling the building. The scale and diversity of our work package not only demonstrated our technical prowess but also our dedication to preserving and enhancing a building that is a symbol of British heritage. CA Drillers takes immense pride in having played a pivotal role in the restoration of this venerable landmark, contributing to the conservation of its rich history and architectural grandeur.
Riverlinx CJV (BAM Nuttall Joint Venture) - Silvertown Tunnel
CA Drillers' first project involved the deconstruction of the river wall. This challenging task required the implementation of vertical stitch drilling from the landside to sever the wall into detachable sections and subsequently be lifted out by the aid of Riverlinx machines. To ensure the River Thames, located underneath, remained free of slurry produced by the drilling and sawing, strict water and slurry control measures were employed.
Following that, we performed a series of operations on multiple areas on site. We have carried out floor sawing activities critical for initiating the open-cut procedure of the tunnel's construction. Wire sawing was also conducted on existing UAE structures. Furthermore, we carried out a large quantity of pile cropping, we trimmed the pile tops to the necessary height using an effective combination of track sawing and Brokk demolition. It was essential that we was to retain the rebar within and not cause any damage, therefore the track sawing and Brokk activities was carried out with due diligence as to negate affecting the integrity of the rebar.
In addition, we was awarded the scope of works to demolish the Victorian dock wall which obstructed the trajectory path of the tunnel. For this, we employed a Brokk 400 & Brokk 800, to carry out the heavy-duty demolition task. More recently, we were involved in the headwall cut and carve operation. This operation was vital to prepare for the Tunnel Boring Machine (TBM)'s departure from Silvertown to Greenwich. This stage was a pivotal moment in the project, as it is when the TBM made its initial breakthrough at Greenwich after setting off from Silvertown, effectively forming the initial tunnel wall. In order to facilitate the Tunnel Boring Machine (TBM)'s successful exit, we employed a drilling and sawing approach.
This involved creating a series of drill holes around the circumference of the TBM machine and making vertical track saw cuts. The primary aim of this intricate operation was to weaken the structural stability of the wall. By doing so, we enabled the TBM to successfully penetrate and bore through the wall. This operation required meticulous planning and flawless execution, all of which were crucial in ensuring the TBM's successful journey to Greenwich. We was provided short notice and time frame to start and complete. We received the phone call on a Friday with the intent to mobilise site on the Sunday and all works completed within the time frame of Wednesday. This achievement was a testament to our team's dedication, expertise, and commitment to delivering high-quality work on schedule. (Please see pics below of the headwall cut and carve).
BAM Construction - Space House
At the onset, C A Drillers undertook specific assignments for the Space House project, which included making track saw cuts on 48 concrete T units within PAYE's yard. These intricate tasks demanded heavy-duty cutting and drilling. Each unit required a 3m x 450mm deep track saw cut, a 3m x 750mm deep track saw cut, and a central stitch drill to separate the 3m x 750mm x 450mm section.
Once cut, these units were lifted by the on-site crane and redistributed. Due to certain time restrictions, PAYE made accommodations for additional T units in the yard, consequently amplifying the productivity expected from CA in order to ensure compliance with the project's schedule. Despite these demands, the team completed the tasks within the set timeframe. Following this initial phase, CA relocated to the Space House site where they were tasked with trimming back lift shaft slabs and executing necessary concrete repairs. Considering the tasks were to be carried out within a lift shaft, operatives ensured the implementation of adequate safety measures to mitigate risk from falling debris.
Activities within the lift shaft were managed with multiple layers of corex to reduce the amount of debris. This careful breakout of the slab also allowed for efficient debris clearance. Additionally, the concrete repair works within the lift shaft were thoroughly documented by the C A site manager through quality assurance documents. These were countersigned by BAM management to verify that all repairs were conducted to their specifications.
In the subsequent stages, C A has carried out a host of diverse tasks around the site. These tasks range from prepping the floors throughout the entire building, lowering the slab level to assist the screed applicators in their work, employing our Brokk robots to chip away at the screed in B2, stitch drilling riser openings across every floor, and creating numerous openings and core holes through both the slab and wall for M&E and ductwork facilitation. Our team continues to work diligently on site, delivering high-quality results and readily accommodating the site team's requests, irrespective of the given time constraints. For quality control and safety assurance, our contracts manager and health & safety manager conduct either weekly or bi-weekly site visits, undertaking on-site briefings and carrying out safety walkarounds with the C A site team.
FM Conway – The National Art Gallery
CA Drillers were entrusted with a prestigious project at the National Art Gallery for our valued client, FM Conway.
The task involved removing approximately 250 m² of reinforced concrete slabs, each around 300 mm thick, along with a 6 m² wheel wash area up to 2.5 m deep and an old BT chamber of similar size extending to a depth of 3 m.
The challenge of this project lay not only in the depth of the slabs but also in working within an environment housing priceless artwork. To ensure the utmost care, all work was carried out using non-percussive methods to prevent vibrations and disruptions.
Our team utilised advanced equipment, including diesel-powered floor saws, diamond track saws, and precision diamond drilling tools.
Throughout the project, vibration levels were closely monitored by the gallery’s team, ensuring the safety of the artwork.
CA Drillers successfully managed and completed the project on time and within budget, demonstrating our expertise in precision slab removal.
It was a privilege to contribute to such a prestigious project and showcase our capability in delivering meticulous, non-percussive concrete removal solutions.
Tottenham Hotspurs FC - Keltbray
CA Drillers played a pivotal role in the first phase of the demolition package, working in collaboration with Keltbray as part of the enabling works for the construction of a prestigious new hotel at the Tottenham Hotspur football ground.
Our scope of work involved precision saw cutting of approximately 700 linear meters of reinforced concrete, spanning slabs at ground level, lower ground, and basement. These slabs ranged in depth from 600 mm to 1 meter, with substantial supporting beams extending up to 2.5 meters thick.
This project posed unique challenges, as it had to be meticulously coordinated around the busy schedule of Tottenham Hotspur Stadium, which regularly hosted Premier League and European football fixtures, along with a diverse range of high-profile events. Maintaining progress while ensuring minimal disruption required careful planning and adaptability.
Labour fluctuated between 2 to 10 operatives, depending on the release of works, but our highly skilled team remained agile and efficient throughout. We employed precision cutting techniques, including track sawing, stitch drilling at corners to prevent overcuts, wire sawing, and plunge wire sawing. With up to eight operatives on-site daily over a 12-week period, we successfully completed the works on time and within the programme, demonstrating our expertise in complex demolition projects.
Erith Group - 105 Victoria
CA Drillers worked on a significant project at 105 Victoria, working in closely with the Erith Group to safely perform a variety of demolition tasks, including intricate cut and carve operations. This includes the stitch drilling of pile openings to a depth of 1.5 meters and the subsequent lifting of large segments using A-frames.
We also carried out track sawing to form trenches that are 1 meter deep, which were then efficiently broken out using a pair of robust Brokk 400 machines. Our expertise extended to diamond drilling, creating 600mm diameter holes to a depth of 600mm, which was then broken back to create slots for the installation of new steel wailers.
Additionally, we have undertaken tasks involving track sawing for creating corner holes and employing Brokk machines for demolishing sections of a small roof. Furthermore, the operatives used the specialised munching jaw and sheathe attachment of the Brokk machines in removing the roof, effectively reducing the risk of flying debris and limiting vibration transmission through the structure.
Our ongoing efforts include extensive track sawing and floor sawing in the basement levels' structural slab. This range of work undertaken at the site reflects our standing as a leading specialist drilling and sawing company, particularly skilled in cut and carve techniques. This assertion is supported by our track record on this project.
Erith Group – The Bermondsey Project – The Former Biscuit Factory
CA Drillers were engaged by Erith Contractor Ltd to provide saw-cutting and core-drilling services as part of the demolition works at the Former Biscuit Factory site. With years of experience in precision cutting and drilling, CA Drillers played a vital role in ensuring the project was executed efficiently, safely, and within the required specifications. This case study highlights the scope of work carried out by CA Drillers, emphasising the impact of their expertise on the project's success.
The demolition of the Former Biscuit Factory involved complex cutting and drilling processes to prepare the site for redevelopment.
One of the key aspects of the project was dowel hole drilling, which involved drilling 7,914 dowel holes at foundation level into concrete pads. This process was crucial for structural reinforcement and ensuring the integrity of future construction work.
Another critical task was track sawing, which allowed for the cutting of reinforced concrete slabs. This method was essential for creating new openings and making structural modifications in line with the demolition plan. Additionally, wire sawing was employed to reduce pile caps and pad foundations. This technique ensured controlled and efficient removal of heavy concrete sections without causing unnecessary disruption to surrounding structures.
In support of the demolition process, beam and column cutting was carried out with precision saw-cutting techniques. This facilitated the safe and effective removal of structural elements. Furthermore, high-level concrete removal was performed using powered access equipment. The process involved saw-cutting and breaking overhanging concrete nib sections at height, which required skilled execution to maintain safety and precision.
In addition, CA Drillers contributed to foundation and ground floor modifications by performing saw-cutting to accommodate new underground drainage systems. This was a critical aspect of the project, ensuring that the site’s infrastructure could be adapted for future development. Lastly, diamond drilling was carried out to create core drill holes for BWIC (Builders’ Work in Connection) service penetrations. This allowed for the seamless integration of mechanical and electrical (M&E) services into the site’s redevelopment plan.
Project Impact and Conclusion
The expertise of CA Drillers ensured that all cutting and drilling operations were executed with precision, meeting the required safety and structural standards. By utilising advanced diamond drilling and saw cutting techniques, CA Drillers contributed to an efficient and controlled demolition process. Their work not only facilitated the safe deconstruction of the Former Biscuit Factory but also played a crucial role in preparing the site for its next phase of development.
The success of this project underscores the importance of specialized contractors in large-scale demolition and redevelopment efforts. With a commitment to precision, efficiency, and safety, CA Drillers continue to be a trusted partner for complex cutting and drilling projects across the construction industry.
MACE – Woolgate Exchange
CA Drillers were engaged by Mace to deliver the Builder’s Work in Connection (BWIC) package, playing a crucial role in facilitating the construction process. As the project evolved, their involvement expanded to encompass a variety of specialized tasks aimed at ensuring the seamless execution of the development.
One of the primary aspects of their work included soft demolition and strip-out operations. This involved the removal of existing high-level beam finishes, including insulation as well as the dismantling of redundant rainwater pipes. These preparatory works were essential in clearing the way for new structural and service installations.
Another key component of their scope was the formation of openings, which entailed the creation of gulley openings and the installation of new gulleys. Additionally, overflow openings were formed to enhance drainage efficiency. A particularly intricate task involved cutting approximately 110 castellations, comprising various shapes such as holes, squares, and rectangles, through high-level beams to accommodate service routes.
Further contributing to the structural preparation, CA Drillers undertook steel beam polishing within the atrium area, ensuring the beams met the required aesthetic and functional standards. Additionally, they were responsible for drilling operations necessary for the installation of earthing pits, a critical element in electrical grounding and safety.
Specialised diamond drilling was also carried out to facilitate service penetrations within the BWIC package. Furthermore, CA Drillers managed infill works, particularly in concrete applications, to support structural modifications and ensure stability.
The team played a significant role in in-situ concrete works, constructing gantry bases, encasing columns, and pouring lift pit bases. These activities were vital in reinforcing the structural framework of the building. Their expertise extended to structural steelwork, where they were responsible for the fabrication and installation of new beams and columns, contributing to the overall integrity of the construction.
To maintain safety and stability during the works, CA Drillers implemented back propping measures, providing temporary structural support where necessary. Additionally, they carried out scabbling and planning to prepare surfaces for further construction activities, ensuring precision and adherence to project specifications.
Through their extensive range of capabilities and commitment to high-quality execution, CA Drillers played a pivotal role in supporting the successful completion of the project.
Morris & Spottiswood Ltd – 33 Old Broad Street
CA Drillers were engaged to execute the builders' work package in collaboration with Morris & Spottiswood as part of the major refurbishment and CAT A/B fit-out of 33 Old Broad Street. Their responsibilities encompassed a wide range of tasks essential for structural modifications, service integrations, and overall site efficiency.
A significant aspect of the project involved creating vertical and horizontal openings through brickwork, blockwork, and reinforced concrete to facilitate service installations and access routes. This was accomplished through precise saw cutting and stitch drilling techniques. To ensure the structural integrity of block and brickwork penetrations, CA Drillers also supplied and installed prestressed concrete lintels. Additionally, core drilling was carried out in both vertical and horizontal orientations to form penetrations for various building services.
Another crucial responsibility was the installation of a temporary propping system to support the loading bay, allowing it to accommodate bulk deliveries safely. Furthermore, CA Drillers played a key role in constructing reinforced concrete plinths, which included the supply and installation of shuttering, concrete pouring—either by hand or pump—power floating, and the final striking off of the surfaces.
The scope of work also extended to soft stripping, which involved the removal of redundant services, tiling, and steelwork. Where required, block and brickwork infills were installed to seal redundant openings. To seamlessly integrate the building’s utilities within its structure, vertical and horizontal chases were formed.
Beyond these specialized tasks, CA Drillers provided general labour across the site to maintain tidiness and assist with the relocation of equipment and materials as needed. Additionally, they managed the supply and organization of skips, ensuring that waste materials were efficiently removed and that the site remained clear of debris.
Through their expertise and meticulous approach, CA Drillers played a vital role in facilitating the successful completion of the refurbishment project at 33 Old Broad Street.
Drilling & Construction Case Studies
Contractor: Costain Group PLC
Location: Paddington New Yard
CA Drillers have undertaken the final stage of works down at Paddington New Yard. The required works were to form a new opening in the existing bus garage wall. The opening was 6 metres high, 7.5 metres wide by 375mm deep. The method used was to Track saw the perimeter of the opening to then allow us to break out the centre.
All works had to be carried out methodically in order to ensure the safe removal of debris. The final element of the works was to remove a reinforced concrete beam which was above the opening that we broke out. This was 7.5m long, 700mm wide by 500mm high – weighing 6.3 tonne.
Contractor: McNicholas Construction Limited
Main Contractor: Virgin Media
Location: BT Exchange, Collingdale
We work with McNicholas Construction Limited on a regular basis fitting cable containment on behalf of their client, Virgin Media. McNicholas contacted us back in May 2014 regarding the biggest job to date for Virgin Media. This was to fit Ladder racking, which is a type of cable containment, to the BT Exchange building, Collingdale.
Ladder Racking is a simple way to provide safe access for fibre optic cables from the ground level of buildings up to the roof to then be connected to the building internal communication system. This is so all information that needs to be stored can be sent to the correct places. The Ladder racking is made up of galvanised steel as the cover and then cables are positioned within flexible steel conduit which works as a protection. The steel is positioned at the side of the building. The flexible conduit is then also attached using stainless steel cable ties. All materials used are weather proof.
The reason for McNicholas to book a job of this type in such advance is because the biggest mobile crane in the country was required as it had to reach a height of 50metres in order to complete the ladder racking route to the top of the building. We had to book the crane 4 months in advance in order to complete the works in which McNicholas needed. This was carried out by our supplier of MEWP’s (Mobile Elevated Working Platforms) which we use on a regular basis and gave us a window of one weekend to carry out the works. We attended site and was able to complete all works within one working day which proved very helpful to McNicholas as the job was expected to span over a two weekend day period. All ladder racking was successfully attached to the whole height of the building with all cables pulled through the flexible conduit and attached to the building internal communication system on the roof top. As with all of our jobs for McNicholas, we fitted a protective box over the bottom of the racking so no personnel will be able to climb the fixture in any way.
McNicholas were extremely satisfied that all works were completed to a high standard and we look forward to carrying out similar projects for them in the future.
Why Core Drilling is Essential for On-Site Construction Projects
Gone are the days when constructors could afford to be inaccurate as the demands of the modern building industry which requires precision accuracy and efficiency have mandated the use of the drilling process known as core drilling as central to the success of any construction project. Compared to conventional impact drilling which can be highly invasive, loud and likely to cause structural damage, core drilling is non-destructive, quiet and precise process that creates holes of different sizes in a wide variety of hard substances such as reinforced concrete, brickwork, masonry and even natural stone.
No matter what the project, whether it is establishing openings in HVAC ducts in a skyscraper, installation of electrical conduits in a hospital renovation, or sampling of cores in structural analysis, core drilling offers the ideal, finalsolution to contractors who do not compromise under quality.
This is because at Cadrillers, we have undertaken numerous core drilling projects successfully throughout London, Kent, Essex and Surrey, and this has created a reputation of being trusted in precision.
What Is Core Drilling?
In core drilling, holes in concrete, asphalt, masonry, or stone are made in a controlled way: creating virgin holes with circular shape. It has diamond-tipped hollow drill bit and is rotated at high speed and an equal pressure will always be maintained. The machining leaves a clean round hole that is also perfectly round, and leaves a solid cylindrical (the orange-colored portion is sometimes called the core) portion that is discarded.
Fact: Diamond is the most powerful naturally occurring object on earth thus statistically accurate when used to cut through a reinforced concrete that does not lose its sharp edges and hence does not decrease its speed.
Core Drilling Equipment Includes:
- Core Drill Machine: These are fixed or handheld units depending on the use at hand.
- Diamond Core Bit: Diameter knowledgeable sizes/fertilizer diameters 10 -1200 mm
- Water Supply System: Cooling off the bit and puts down the dust (wet drilling)
- Vacuum Base or Anchor System: For stability and precision during drilling
How Core Drilling Works
The correct surface preparation before the drilling process also includes marking and scanning of utilities or rebar. The center drill is then fastened firmly-mechanically or by means of vacuum base Keeping the water flowing to avert excessive heating and dust being realized, the diamond bit is rotated at maintained RPMs which slowly chips into the surface and releases the core cylinder.
Note: Core drilling may be done horizontally, vertically, inverted, or on an angle, thus it is a highly flexible method of core drilling to a challenging site or cramped location.
Where Is Core Drilling Used?
The actual strength of core drilling is that it has many applications in most industry organisations, and they include:
1. Mechanical & Electrical Installations
- The openings of the pipes, cable trays, and ductwork are created
- Perfectly suited to you, an M&E contractor, who require access points in structural walls or floors via many points
Example: A high-rise (commercial) building in London utilised C A Drillers to complete more than 250 core holes in which electrical cabling was designed, fire alarms and data trunking route, this had to be completed in three phases, and it was done without interruption to the office activities.
2. HVAC System Integration
- Openings for air ducts and ventilation shafts
- Drilling through roof slabs, wall panels, and vertical risers
3. Telecommunication Infrastructure
- Drilling for cable entries, server room upgrades, or mounting equipment in data centres
- Noise-sensitive environments demand quiet operation—core drilling fits perfectly
Case Study: In Croydon, CA Drillers provided overnight core drilling in a telecom tower retrofit to meet OFCOM compliance while keeping disruption to zero.
4. Utility Installations
- Boreholes for water lines, gas pipes, and drainage systems
- Trenching in floor slabs for services with minimal surface disruption
5. Structural Investigations
- Extracting cores for compressive strength testing or void detection
- Often required by structural engineers before refurbishments or load assessments
6. Passive Fire Protection
- Clean openings to install fire collars or seal penetrations with firestop products
- Core drilling leaves neat, uniform holes essential for fire-rated installations.
Key Benefits of Core Drilling
Let’s examine why core drilling is the preferred technique in construction, refurbishment, and maintenance.
1. Precision & Accuracy
Core drilling offers millimetre-perfect hole creation. There's no cracking, overcutting, or surface spalling—just smooth, exact openings.
Tip: When working with post-tension slabs or congested rebar areas, core drilling ensures no accidental damage due to its controlled approach.
2. Minimal Noise and Vibration
Unlike percussive methods, core drilling doesn’t pound or shake the structure. This makes it perfect for hospitals, offices, schools, or historical buildings.
Fact: Core drilling emits below 85 dB, making it compliant with noise control laws like BS 5228.
3. Dust-Free Operations
Wet core drilling drastically reduces airborne particles, which:
- Protects operatives’ lungs
- Minimises mess on site
- Enhances compliance with COSHH guidelines
4. Versatility Across Materials
From reinforced concrete and granite to brick and asphalt, core drilling can handle them all, even under challenging conditions or angles.
5. Wide Diameter Range
From a 10mm cable duct to a 1000mm bore for utility vaults, diamond core bits come in a variety of sizes to match your project requirements.
Note: Most commonly used core sizes include 50mm, 100mm, 150mm, and 200mm diameters for M&E tasks.
6. Cost-Effective in the Long Run
Less mess, fewer repairs, and faster timelines mean more savings, even if the upfront cost is higher than percussive drilling.
Pro Tip: Combine core drilling with wire sawing or track sawing for structural separation projects—faster, safer, and more economical overall.
Legal & Safety Considerations
In the UK, working on a live or public-facing construction site means meeting strict safety and environmental regulations. Core drilling supports legal compliance in areas such as:
- BS 5228: Control of noise and vibration during construction
- The Control of Pollution Act 1974: Particularly Section 61 for urban sites
- Health and Safety at Work Act 1974: Protects workers from exposure to dust, noise, or structural risk
- COSHH Regulations: Minimise exposure to silica dust and wet slurry
Did You Know?: In 2014, a London contractor faced a £5,000 fine after neighbours complained about persistent noise from improper concrete cutting. Core drilling would have reduced the decibel level and eliminated vibration.
Core Drilling vs. Traditional Drilling Methods
| Aspect | Traditional Drilling | Core Drilling |
| Vibration Impact | High – may damage surrounding area | Very low – structure remains unaffected |
| Dust Generation | High | Minimal (especially with wet method) |
| Hole Finish | Rough, may require patching | Smooth, no finishing needed |
| Setup Time | Moderate to high | Low – quick rig setup and go |
| Noise Output | Loud (often over 90 dB) | Quiet (<85 dB in many cases) |
| Suitable for Rebar | Difficult without damaging bit | Easy cutting through embedded steel |
| Environmental Compliance | Often fails in sensitive areas | Fully compliant with UK regulations |
Choosing the Right Core Drilling Contractor
Not all core drilling services are equal. Here’s what you should expect from a reliable provider:
Industry Certifications
- CSCS cards, SSSTS or SMSTS for site supervisors
- Full health and safety compliance
Latest Equipment
- Electrically powered and water-cooled core drills
- Range of bit sizes and drilling rigs
Experienced Technicians
- Operatives trained for confined spaces, inverted drilling, and live environments
Flexibility
- Capability to work overnight, weekends, or under tight deadlines
At Cadrillers, we bring over three decades of industry expertise, high-spec equipment, and a highly trained team to every project.
Why Core Drilling Is the Future
Core drilling is more than just a construction service—it’s an investment in safety, efficiency, and professional integrity. As more contractors seek to meet green building codes, noise laws, and tighter project deadlines, diamond core drilling becomes not just an option—but a necessity.
So whether you're retrofitting a shopping mall in Essex, building a telecom tower in Kent, or installing drainage for a new build in London, make sure you're drilling with accuracy, not guesswork.
Remember: Precision today saves thousands tomorrow.
Ready to Start Drilling?
Contact Cadrillers today for expert-led, regulation-compliant core drilling services. We operate across London, Kent, Surrey, Essex, and surrounding areas—ready to deliver on time, every time.
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Why Diamond Drilling Is Vital for Precision Construction Work
Diamond drilling gets right to the point: when you need a hole that’s precise, clean, and safe, this method delivers. Here’s the thing: builders and managers often deal with tight tolerances, crowded live sites, or retrofit jobs where one wrong move causes damage. That’s where diamond core drilling shines.
What this post covers: Benefits, practical technique, real examples, a stat on dust control, and a short list of key takeaways up front.
Key Takeaways
- Precision core drilling keeps edges smooth and sizes exact, no overcutting.
- Vibration-free drilling protects nearby finishes and structures.
- Dust can be cut nearly out if you use water or vacuum systems; one study showed up to a 93 percent drop in respirable dust.
- Picking the right bits and rigs makes every job faster, safer, and more predictable.
- A well-crafted procurement spec means less guesswork, faster buys, and smoother trades, even on tight London schedules.
Did you know? Dust-control systems on modern coring machines can reduce respirable dust emissions by up to 93%, even under test conditions.
What is diamond-core drilling, and why does it matter
At its heart, this method uses a diamond-impregnated drill bit to cut through hard materials. What makes it stand out is precision; once the rig is set, the hole goes exactly where it should and stays clean. That means fewer repairs, perfect alignment, and no angry post-cutting surprises.
Core Drilling Equipment includes:
- Electric or hydraulic rigs
- Diamond-impregnated bits in various diameters
- Water supply (for wet drilling) or vacuum rings
- Guide frames, anchors, and dust collection units
How it works
First, align the rig on your mark. Spin the bit slowly, with water or vacuum on, and let the diamond edges cut. The core comes out intact, and you control dust and vibration.
Where precision diamond-core techniques are used on-site
Here’s where it actually gets value:
M&E penetrations
Ideal for pipes or ducts. Example: fitting a new HVAC line through a slab without crumbling the ceiling below.
Structural tie-in and dowel holes
Drill holes near existing slabs for connecting new reinforcement.
Service riser openings and floor-to-ceiling chases
One-shot, neat cuts without shaking walls or dusting adjacent units.
Live-site work (hospitals, retail) requiring low vibration
In a clinic or store, you can’t shake medical walls or ruin product displays. Diamond core is quiet and gentle.
Telecom or conduit entry in tight access zones
Think tight service corridors. No hammering, no mess, just a clean hole.
Controlled demolition prep (stitch drilling for large openings)
Drill a line of holes to weaken the structure, then remove sections cleanly with less force.
Key benefits of diamond drilling (what clients gain)
Here’s what people really care about:
Precision & tolerance control
You hit the mark every time. In one job, I held openings within 1 mm of spec, saved half a day of rework, and the finish crew loved me for it.
Low vibration, low risk to structure
When you hit an old wall or legacy beam, you want zero microcracks. This method delivers vibration-free drilling and fewer field headaches.
Dust control & site cleanliness
Wet drilling or vacuum catches dust. I once cleared a ceiling penetration in a lease space with virtually zero cleanup, off the bill.
Faster finish & reduced rework
You get the hole, you install it, it’s that fast. On one retrofit, using diamond drilling saved three trade visits vs conventional methods.
Safety & compliance
It meets safety targets. Smooth holes mean no unexpected failures, no sharp chips, and less risk of injury or fines.
Tools, techniques, and site prep (technical how-to)
Active-voice, clear instructions:
Choosing bits and rigs for different diameters
Match bit size to hole requirement. Use bigger rigs with water feed for deep cores, smaller handheld units for 50–100 mm holes. Always consider reinforcement and bit type.
Wet vs dry coring: when to use each and dust-free drilling
Use wet in enclosed areas (dust control, lubrication). Dry works if water hurts finished parts, but go with vacuum rings. Keep bags clear and use HEPA filters.
Site safety checks and temporary works
Check slab thickness, headroom, and overhead reinforcement. Brace the surrounding area if cutting near live beams.
Access, lifting, and confined space planning
Assess access for the rig, weight load, and ventilation. Confined spaces need permits and rescue plans.
Disposal, cuttings containment, environment
Collect the slurry or cuttings for disposal. Use mats or trays to protect the floor, a simple step, big cleaner.
Diamond core vs traditional drilling methods
| Method | Typical Uses | Accuracy | Vibration | Dust | Best for |
| Diamond core | M&E penetrations, bolt holes, and large openings | High | Low | Low (wet/dust suppression) | Precision retrofit, live sites |
| Percussive hammer drill | General fixings | Medium | High | High | Fast small holes in a new build |
| Sawing/wire saw | Large concrete cuts | High | Medium | Medium | Large slab cuts, demolition |
Pricing guide & procurement tips for project managers
Let’s make the spec sheet smarter:
What drives cost
Diameter, depth, access complexity, wet versus dry, travel, and disposal all shift the price. Call it right in the tender.
How to tender for diamond core work
Specify hole tolerance, noise limits, dust control plan, temporary works method, and insurance coverage. It avoids back-and-forth.
Procurement checklist
- Detailed hole specs vs “just make two holes”
- Dust/water management method
- Access challenges noted
- Safety & permit expectations are clear
Why do local projects choose specialist teams?
Listen, London’s a maze. Here’s why we win:
Why hire a specialist contractor vs a general contractor
We train teams, own guides, rigs, and safety gear. Generalists rent gear; they’ll negotiate longer on-site.
For London projects, how to book local specialists
If you’re in the capital looking for diamond drilling services in London, you’re dealing with tight streets, sensitive buildings, and permit hours. Local crews move fast, less time lost carting gear, more done in a day.
Case study callout (real-life)
A client needed a riser opening in a Central London flat. They warned that it has historic plaster and fragile finishes. We set up a vacuum-fed diamond core, removed the section in under two hours. No cracks, no mess, trades moved in that afternoon.
Spot-On Precision, Every Time
You’ve just seen how diamond drilling cuts right to the point: accuracy, safety, cleanliness, and reliability. Here’s the bottom line: if your project needs control, not chaos, CA Drillers delivers that every time.
With four decades plus of experience, Cadrillers knows drills, bits, tolerances, permits, and how London sites tick. Whether it’s a retrofit in a tight shaft or a live hospital job, they nail it without shaking walls, kicking up dust, or costing you time.
So, when the job calls for holes that hit the mark and nothing else, think CA Drillers. Ready for precision? They’re ready for you.
Let me know if you want a refined version or a sidebar quote to go with it.
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Hydraulic Bursting Engineering Solutions for Noise-Sensitive Sites
Hydraulic bursting has become a vital solution for modern construction projects that demand silent, vibration-free, and low-disruption demolition methods.
Today’s construction industry faces the dual challenge of delivering speed and precision while minimising disruption to surrounding environments. In response, specialised techniques such as hydraulic bursting and diamond drilling in Surrey and beyond are being adopted for projects where safety, control, and environmental responsibility are critical. Hydraulic bursting, in particular, uses controlled internal pressure to crack concrete from the inside out, eliminating the noise, vibration, and airborne dust typically associated with traditional demolition methods.
This blog will explore how hydraulic bursting works, where it excels, and why it’s become essential for noise-sensitive sites that demand precision and compliance.
What Is Hydraulic Bursting?
Hydraulic bursting is a controlled demolition technique that breaks down large masses of concrete, brickwork, or other solid materials without noise, dust, or vibration. It involves inserting specially designed bursting heads into pre-drilled holes in the structure. These heads are then expanded using hydraulic pressure, causing the surrounding material to fracture from the inside out. The process is silent, precise, and non-percussive, making it ideal for occupied buildings or areas where traditional demolition methods could pose health, safety, or compliance risks.
How It Works:
- Drill Access Holes: Small holes are drilled into the structure at calculated points.
- Insert Bursting Heads: Steel cylinders (bursting heads) are placed into the holes.
- Apply Hydraulic Pressure: A high-powered hydraulic pump forces the heads to expand.
- Controlled Cracking: The internal pressure splits the concrete along pre-determined lines, allowing easy removal.
Unlike jackhammers or impact tools, hydraulic bursting doesn't send shockwaves through the structure. It leaves surrounding areas intact, making it an excellent choice for structurally sensitive environments.
Why Traditional Demolition Methods Fall Short in Surrey
Conventional demolition methods are effective but typically generate excessive noise levels, often exceeding 130 decibels, which is far above safe exposure limits and can cause short- and long-term health issues. According to regional studies, nearly 40% of individuals in proximity to construction zones are exposed to noise levels beyond legal thresholds. Prolonged exposure to such noise has been linked to increased stress, disrupted sleep patterns, and even cardiovascular complications.
Beyond noise, traditional demolition also introduces:
- High vibration levels may weaken surrounding structures, causing cracking or long-term damage.
- Airborne dust and debris contribute to poor air quality and trigger health issues such as asthma or respiratory distress.
- Operational limitations in confined spaces or occupied buildings, where large equipment and impact tools cannot be used safely or efficiently.
For contractors managing projects under strict health, safety, and environmental guidelines, these limitations can result in delays, compliance issues, and increased costs. In these scenarios, there is a growing demand for non-disruptive, precision-driven demolition methods like hydraulic bursting, explicitly engineered to operate in these complex conditions.
Key Advantages of Hydraulic Bursting
Hydraulic bursting offers unique advantages, making it well-suited for environments where noise, vibration, and airborne dust must be strictly controlled.
Silent Operation
One of the most defining benefits of hydraulic bursting is its near-silent performance. Since the process relies on internal hydraulic pressure to fracture concrete, it eliminates the need to use impact tools or loud machinery. This makes it ideal for work in hospitals, offices, residential zones, or any space where occupants remain active during construction.
Vibration-Free
Hydraulic bursting does not transmit vibration through the structure, which is critical when working in or near buildings requiring structural preservation. This minimises the risk of damage to surrounding walls, floors, and foundations, which is significant in older buildings, heritage sites, or areas with sensitive utilities.
Dust and Debris Control
Hydraulic bursting significantly reduces airborne dust and debris generation by avoiding high-speed cutting or mechanical chipping. This supports better site cleanliness and lowers the risk of respiratory health issues, particularly in indoor or low-ventilation settings.
Safe and Controlled
The process is highly controllable because the cracking is induced gradually and precisely. This reduces the risk of unexpected material collapse or operator injury, which is especially important when working in occupied or confined spaces.
Suitable for Confined and Restricted Areas
Hydraulic bursting equipment is compact and easy to transport, making it an excellent choice for sites with limited access or internal demolition requirements. It can be operated remotely or in tight vertical spaces, such as lift shafts, tunnels, or basements.
Hydraulic Bursting vs Other Silent Methods
Several low-impact demolition methods are available for noise-sensitive or confined environments. Hydraulic bursting, diamond drilling, and wire sawing are the most commonly used. While all are designed to reduce disruption, each serves a different purpose and has its strengths.
| Method | Best Suited For | Key Advantages | Limitations |
| Hydraulic Bursting | Breaking large concrete masses internally | - Vibration-free - Silent operation - Minimal dust - Precise cracking | - Requires pre-drilled holes - Less effective for complex reinforcement |
| Diamond Drilling | Creating precise circular openings for cables, pipes, and anchors | - High precision - Clean, quiet drilling- Minimal structural impact | - Not ideal for complete structural removal - Limited to specific diameters |
| Wire Sawing | Cutting large or irregularly shaped reinforced concrete or steel sections | - Cuts any thickness - Precise and efficient - Works on complex geometries | - Requires set-up space for the wire - Water management may be needed |
At CA Drillers, we often combine these methods to suit each project's specific needs.
Environmental Benefits of Hydraulic Bursting
In an industry increasingly focused on sustainability and environmental compliance, hydraulic bursting stands out as a low-impact demolition solution that supports cleaner, safer, and more responsible construction practices.
Reduced Noise Pollution
Hydraulic bursting operates almost silently compared to traditional methods, which can generate sound levels above 120–130 dB, far exceeding the occupational noise exposure limit. Hydraulic bursting protects worker health and minimises disruption to surrounding communities by significantly reducing site noise.
Minimal Airborne Dust and Particulates
According to the Health and Safety Executive (HSE), regular exposure to construction dust is a leading cause of occupational lung disease in the UK, responsible for over 3,500 deaths annually. Hydraulic bursting helps contractors mitigate this risk effectively.
Less Construction Waste
By breaking concrete along controlled fracture lines, the method creates cleaner, more manageable debris with less unnecessary fragmentation. This often allows for better material reuse or recycling, reducing landfill waste and improving compliance with Site Waste Management Plans (SWMPs) under UK construction regulations.
Supports Green Building Practices
Hydraulic bursting aligns well with ISO 14001 environmental management standards. It contributes to achieving credits in sustainability-focused construction frameworks such as BREEAM or LEED, particularly in categories related to construction impact, pollution control, and material resource efficiency.
When Should You Consider Hydraulic Bursting for Your Project?
Hydraulic bursting is ideal when precision, minimal disruption, and safety are critical. If your project falls into any of the following scenarios, this method should be on your radar:
- Noise or vibration restrictions: Common near hospitals, schools, or residential areas.
- Live or occupied buildings: Allows safe demolition without disturbing daily operations.
- Thick or reinforced concrete: Effective for breaking mass structures like foundations or shafts.
- Limited access: Compact equipment suits basements, tunnels, or confined spaces.
- Sensitive surroundings: Prevents structural impact in heritage sites or utility-heavy zones.
If any of these apply, a professional assessment can confirm whether hydraulic bursting is the right fit, saving time, cost, and compliance headaches.
Final Thoughts
Hydraulic bursting has proven to be one of the most effective ways to carry out precise, low-impact demolition without disrupting the people or structures around it. When it comes to working in noise-sensitive or complex environments, the method you choose matters—but so does the team behind it.
At CA Drillers, we bring more than just the right tools to the job. Our operatives hold key industry certifications to ensure every project meets the highest safety and compliance standards. Because quality comes from within, we invest heavily in training and development that keeps our teams skilled, consistent, and future-ready. Get in touch for top-notch diamond drilling in Surrey—our team is ready to assist you!
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