Hydrodemolition Services
Rentajet delivers hydrodemolition services for concrete repair, refurbishment and selective removal across the UK. Also known as hydroblasting or ultra-high-pressure water jetting, robotic hydrodemolition and handheld systems use pressurised water to strip out deteriorated concrete to a specified depth while leaving embedded reinforcement clean and intact, leaving a substrate ready for sprayed concrete or a formed pour.
As specialist hydrodemolition contractors, we combine robotic hydrodemolition and handheld hydrodemolition under one contractor nationwide, often deploying both on the same project to suit access, geometry and programme.
Why Engineers Specify Hydrodemolition Over Jackhammers
When a structure needs concrete removal without compromising what stays, the removal method decides the integrity of the repair. Pneumatic breakers and jackhammers tear concrete out fast but transmit percussive shock into the surrounding substrate, causing micro-cracking. They damage rebar, force operatives into HAVS-controlled shift rotation, and leave a fractured surface that downgrades bond.
Hydrodemolition uses a controlled ultra-high pressure water jet to selectively break out deteriorated concrete while leaving the sound substrate and the rebar intact. There is no vibration, no micro-cracking, no rebar damage and no HAVS exposure. The surface is profiled, clean and ideal for bond, which is why concrete repair specifications written to ICRI CSP and BS EN 1504 standards increasingly mandate hydrodemolition as the removal method.
That difference is what makes hydrodemolition services the specified method on bridge deck repairs, marine concrete refurbishment and structural strengthening projects where the integrity of the repair is the entire point of the job.
Get a Quote
Contact UK’s Leading Hydrodemolition Specialists
For hydrodemolition services on UK bridge deck repairs, marine concrete refurbishment, industrial slab removal or full-depth demolition, contact Rentajet. Our hydrodemolition teams mobilise from Romsey with London and Manchester support.
Our Hydrodemolition Services
Rentajet operates a full range of hydrodemolition services configured to the structure, the removal depth and the access on site.
Robotic Hydrodemolition
Diesel or electrically powered robots with long-reach arms, used for bulk concrete removal across bridge decks, large slabs and marine concrete. Keeps the operator at distance and runs at high production rates.
Handheld Hydrodemolition
Operator-controlled UHP lance work for restricted access, intricate geometry and precision removal where robot deployment is not viable. Used both as primary method on small repairs and as a complement to robotic work.
Selective and Partial-Depth Concrete Removal
Controlled removal of deteriorated concrete cover to a defined depth, leaving sound substrate and rebar in place. Vibration-free concrete removal on bridge deck patch repairs and structural strengthening.
Full-Depth Concrete Removal and Demolition
Complete removal of slabs, walls and bases through the full section. Used on demolition, decommissioning and replacement scopes.
Underwater and Marine Hydrodemolition
Removal of marine and tidal-zone concrete from piers, jetties, quay walls and submerged structures. Concrete removal on harbour refurbishment and offshore concrete repair.
Deep Scabbling and Aggregate Exposure
Aggressive UHP removal that exposes the coarse aggregate to produce a deep mechanical key at ICRI CSP surface profile 7 to CSP 9. Used ahead of bonded concrete overlays and structural repair.
Benefits of Hydrodemolition Services
Robotic hydrodemolition and handheld hydrodemolition change the safety, programme and quality profile of concrete removal.
no micro-cracking in the substrate and no transmitted shock, which preserves the integrity of the repair.
reinforcement is exposed clean and ready for direct reinstatement, removing the cost and programme delay of rebar replacement.
operators control the robot at distance or run handheld lances within Water Jetting Association limits.
the jet removes deteriorated concrete and stops at sound material, which is not achievable with hand tools.
produces an ICRI CSP-compatible surface profile with no laitance or micro-cracking.
production rates that compress concrete repair programmes on the critical path.
Hydrodemolition vs Traditional Percussive Methods
Jackhammers and pneumatic breakers remain the default on sites without specialist water jetting capability. They are cheap to mobilise but expensive to run, with substrate microcracking, rebar damage, HAVS-driven shift rotation and dust restrictions. Hydrodemolition services carry a higher equipment day rate but pay back through programme compression, repair-grade surface profile and preserved rebar.
| Factor | Hydrodemolition | Jackhammers / Pneumatic Breakers |
|---|---|---|
| Substrate micro-cracking | None | High, requires further removal before repair |
| Rebar condition | Preserved clean and intact | Frequently bent, nicked or damaged |
| HAVS risk to operator | None on robotic, controlled on handheld | High, shift rotation required |
| Surface bond profile | ICRI CSP profiled, ideal for repair | Fractured, often unsuitable for bond |
| Removal speed | Up to 25x faster on bulk removal | Slow, labour-intensive |
| Selective depth control | Yes, stops at sound concrete | No, removes indiscriminately |
| Noise and dust | Low, no airborne dust | High noise, significant dust |
| Compliance with BS EN 1504 / ICRI | Yes, specified method | Often non-compliant for repair scopes |
Applications of Hydrodemolition Services
Hydrodemolition is specified wherever concrete needs to be removed without damaging
what stays.
Civil Engineering and Infrastructure
Bridge deck and parapet removal, tunnel lining refurbishment, dam and culvert works and reinforced concrete strengthening. Robotic hydrodemolition on highway, rail and utility infrastructure.
Marine, Coastal and Offshore Concrete
Quay wall, jetty, sea defence and tidal-zone concrete repair, including underwater concrete removal. Used on harbour refurbishment and port concrete maintenance.
Industrial and Buildings
Industrial floor slab, machine base, foundation and car park slab refurbishment. Building facade and balcony repair. Vibration-free concrete removal across heavy industry and commercial structures.
Industries We Serve
Rentajet delivers hydrodemolition services to UK operators across the sectors most reliant
on durable reinforced concrete.
Civil Engineering
Highways structures, rail bridges, tunnels and reinforced concrete refurbishment. Removal specified to BS EN 1504 and ICRI CSP repair standards.
Marine, Maritime and Offshore
Ports, harbours, jetties, sea defences and offshore concrete structures. Underwater and tidal-zone hydrodemolition available.
Highways, Rail and Aviation
Bridge deck repair, parapet and edge beam removal, runway and apron concrete works under tight possession windows.
Utilities and Power Generation
Turbine bases, transformer plinths, cooling tower concrete and reinforced concrete plant on power and water utility sites.
Demolition and Decommissioning
Full-depth concrete removal on end-of-life structures, foundations and industrial bases ahead of dismantling and site clearance.
Petrochemical and Heavy Industry
Plant bases, bund walls, reinforced concrete pads and process concrete on refineries and chemical plants. Handheld hydrodemolition for confined and complex access.
Choose RGL Services for Hydrodemolition Services
Rentajet has been delivering water jetting services to UK heavy industry and civil engineering since 1984 and operates one of the most comprehensive hydrodemolition fleets in the UK, covering robotic hydrodemolition, handheld hydrodemolition and underwater capability.
Hydrodemolition services sit inside a wider water jetting capability that includes abrasive water jet cold cutting, refractory lining removal, surface preparation and industrial cleaning, so hydrodemolition teams arrive with the full scope of supporting services on the same mobilisation.
- Forty years of UHP water jetting experience: established 1984, delivery across UK civil engineering, marine and industrial concrete repair.
- Robotic and handheld capability: diesel and electric robots with long-reach arms plus handheld lances, configured to the structure and access.
- ISO 9001, ISO 14001 and ISO 45001 registered: Water Jetting Association membership and full adherence to the WJA Code of Practice.
- Specification-grade repair surface: produces ICRI CSP-compliant profile suitable for BS EN 1504 concrete repair systems.
- UK-wide mobilisation: Romsey HQ with London and Manchester support, and overseas capability on project work.
The result is a contractor that engineers, specifiers and contractors can specify with confidence on hydrodemolition services scopes where the integrity of the substrate is the basis of the entire repair.
Our Hydrodemolition Process
Rentajet follows a five-step process on every hydrodemolition mobilisation.
01. Site Survey and Method Statement
We survey the structure, the removal scope, the rebar layout, the access and the water
management constraints. Method statement and risk assessment produced to WJA Code of
Practice.
02. Mobilisation and Set-Up
A purpose-built rig is mobilised and deployed into the pipe or sewer. Pump units run at up to 2,800 bar, with all hoses, nozzles and connections inspected under WJA Code of Practice.
03. Robot Set-Up and Commissioning
Robot positioned and aligned, or handheld equipment configured for the access. Cut depth,
traverse speed and nozzle configuration set and signed off before water is applied.
04. Concrete Removal
The robot is run remotely or the handheld lance is operated to remove concrete to the
specified depth. The jet stops at sound substrate, leaving rebar exposed clean and intact.
Vibration-free concrete removal throughout.
05. Handover for Repair
Substrate washed down, surface profile confirmed against the repair specification, rebar
inspected and signed off as repair-ready. Photographic record and removal report issued.
Hydrodemolition Services FAQs
Hydrodemolition services carry a higher equipment day rate than jackhammering but typically deliver a lower total project cost through programme compression, preserved rebar and a repair-grade surface. Contact us for a project-specific quotation.
On bulk removal, robotic hydrodemolition runs up to 25 times faster than hand-tool jackhammering, with no HAVS shift rotation.
No. The water jet removes concrete and stops at the reinforcement, leaving rebar exposed clean and intact, ready for direct reinstatement.
Yes. Hydrodemolition produces an ICRI CSP-compatible surface profile with no laitance and no micro-cracking, the substrate condition required by BS EN 1504 concrete repair systems.
Yes. Rentajet operates underwater and tidal-zone hydrodemolition services on marine concrete, quay walls, jetties and sea defences.
Yes. Rentajet operates underwater and tidal-zone hydrodemolition services on marine concrete, quay walls, jetties and sea defences.