GPR Concrete Scanning in London
We're based in Canary Wharf, so London is the one city where there's no travel premium and no waiting on a surveyor coming down the motorway. It's also where ground penetrating radar earns its keep hardest, densely reinforced commercial cores, post-tensioned floors through almost every residential tower from Nine Elms to Stratford, and a listed-building fabric that rules out anything destructive. Scanning before you drill, core or cut here is the default, not the upgrade.
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What we image, and with what. We run two complementary GPR technologies rather than one, because London throws up both problems. The Hilti PS 1000 X-Scan is a pulsed radar that images congested reinforcement, metal and plastic conduit, and voids in real time, ideal for marking up a busy commercial slab on the spot. The Proceq GP8100 is a six-channel stepped-frequency radar that covers large slabs, decks and post-tension floors quickly, to 80 cm, with the data kept for the report. Where you need cover depth or bar diameter confirmed at shallow depth, typically for compliance on a heritage or commercial element, we pair the radar with a Hilti PS 300 Ferroscan, purpose-built for ferrous detection where GPR resolution runs out. The instrument is matched to the question, not the other way round.
What the scan gives you is a depth-indicative map of what the data shows inside the slab: rebar layout, likely post-tension tendon positions, embedded services, voids and slab thickness, marked on the slab itself in paint or chalk, and supplied as a measured deliverable so your team drills into known clear zones.
Ferro scanning in London
Where the question is cover depth, bar spacing or bar size, we use the Hilti PS 300 Ferroscan, which detects to 200 mm and logs the readings for your engineer. Bar diameter is an estimate within a range; GPR does not give it. There is no separate London ferro page because it is the same team and the same day on site: ask for ferro, GPR or both when you book.
Working in London
From our Canary Wharf base we cover all 32 boroughs and the City. We hold out-of-hours and weekend slots for occupied commercial premises, where scanning has to happen around a live building. For basement, underpinning and party-wall works we scan ahead of the excavation, so the structural picture is known before anyone breaks ground.
Recent London work includes a survey at Brent Cross shopping centre for Randox.
Deliverables
- On-slab marker plan in survey paint or chalk
- Annotated PDF report with depths and locations
- Digital DXF / DWG plan compatible with your CAD software
- Photographs of marked-up areas
- Surveyor sign-off and method statement
London questions, answered.
- Can you scan post-tension floors in the residential towers?
- Yes, locating likely tendon positions before drilling is core to our pre-drill work. We mark tendon zones on the slab and supply a DXF before any penetration.
- Can you work out of hours in an occupied office?
- Yes. Much of our London work is evenings and weekends, scanning around live commercial space with minimal disruption.
- We're forming a basement under a listed building, can you help before we excavate?
- Yes. GPR is non-destructive, which is exactly what listed fabric and party-wall obligations call for; we scan ahead of the dig.
- How fast can you reach a central London site?
- We're in Canary Wharf. We call back the same working day, and are often on site the same week.
GPR Concrete Scanning elsewhere.
Other services in London.
Real jobs. Real data.
Clearing a core through a post-tensioned slab in Pimlico
Keyshel Interiors needed a 127 mm core through a post-tensioned slab on Belgrave Road, Pimlico. Corvus scanned the slab to clear the position, then came back and drilled the core.
View case study
Seventeen high-rise blocks scanned for a fire engineer
Poplar HARCA needed to know how the concrete in its high-rise blocks was reinforced. Corvus scanned seventeen blocks in East London with GPR and Ferroscan, without breaking out in occupied buildings.
View case studyNeed GPR concrete scanning in London?
Tell us what you need and when. We'll come back the same working day with a quote and a date in the diary.