What is GPR scanning, and when do I need it?
GPR (ground penetrating radar) scanning sends low-power radio pulses into concrete or ground and records what reflects back, so you can see what is inside before you cut or dig. You need it before coring, drilling or saw cutting concrete, to find rebar, post-tension tendons and conduits, and before excavation, to find buried cables, pipes and ducts. We scan concrete with a Proceq GP8000 and survey the ground with a Proceq GS8000.
What is the difference between the GP8000 and the GS8000?
They are two instruments for two jobs. The Proceq GP8000 scans inside concrete slabs, walls, beams and columns for rebar, post-tension tendons, conduits and voids, up to 1.5 m deep. We use it before core cutting or drilling. The Proceq GS8000 is a ground radar on a survey cart that maps buried services in soil, up to 10 m depending on the ground. We use it before excavation. We own both, so each job gets the right instrument.
How deep and how accurate is GPR?
In concrete the GP8000 reads up to 1.5 m, and bars and tendons in a normal slab sit in the first 300 mm, where positions are typically within about ±10 mm. In the ground the GS8000 reaches up to 10 m, usually 5 to 10 m in UAE soil: dry inland sand reads deep, saline sabkha and reclaimed coastal ground can pull it below 5 m. Congested reinforcement, wet concrete and saturated ground all reduce what radar can resolve, and we tell you on site when that applies.
What do I receive after a scan?
On the day, findings are marked on the concrete or painted on the ground, with the safe positions shown for your crew. Within 24 hours you receive a PDF report with a marked-up layout, the position and depth of what we found, the positions we cleared, and any limits that affected the scan. For larger ground surveys we provide a drawing over your site plan, and GP8000 3D data is available on request.
How quickly can you get to site?
Dubai and Sharjah: usually the same day or the next morning, subject to site access. Abu Dhabi: usually next day, longer where a permit to work has to be raised first. Al Ain, Ajman, Umm Al Quwain, Ras Al Khaimah and Fujairah: planned visits with a day's notice. We reply to WhatsApp quote requests within 1 hour during working hours, Sunday to Thursday 8 AM to 6 PM and Saturday 9 AM to 3 PM. Friday is closed. Night and weekend work in occupied buildings is arranged in advance.
How much does GPR scanning cost in Dubai?
It is priced mainly on the area scanned and the time on site, not the number of holes, because clearing one position still means scanning a zone around it. Twenty penetrations in one bay cost far less per hole than one isolated core in a large floor. Access, working hours and the report you need also move the price. Send the address and floor, roughly how much area, what the element is, whether the building is occupied and your date, and we will give you a fixed price before we come.
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Do you scan before core cutting?
Always. Most UAE high-rise slabs are post-tensioned, and each strand carries roughly 140 to 200 kN. Cutting one releases that force at once and takes the tendon out of service along its full length; it cannot be repaired by filling the hole. We scan the zone around every position with the GP8000, mark the tendons and clear positions, and only then core. We do not core an unscanned post-tensioned slab.
Do you survey the ground before excavation?
Yes. Every excavation we do starts with a GS8000 survey of the dig area. We paint buried power cables, water and sewer lines, telecom ducts, plastic pipes, tanks and voids on the ground with estimated depths, and agree the safe dig limits before any machine breaks ground. Authority drawings and NOCs are still needed; the survey checks them against what is actually in the ground.
Is GPR better than X-ray for concrete scanning?
For most UAE jobs, yes, but not always. GPR works from one face, uses no radiation, needs no exclusion zone and shows results during the visit, so it works on occupied floors, ground slabs, rafts and walls against earth. X-ray needs access to both faces and the area cleared on both sides, but gives a sharper image in very congested reinforcement and separates objects stacked directly above one another. If you can reach both faces, clear the area and need that detail, X-ray is the better tool.
Is GPR scanning safe in an occupied building?
Yes. GPR emits low-power radio pulses and no ionising radiation, so there is no exclusion zone, no shielding and no need to clear the floor below. It is non-destructive: the antenna rolls over the surface and the only thing left behind is marker. That is why it suits trading malls, hotels, hospitals and occupied offices.
What happens if you find a cable exactly where we need to cut?
We stop and tell you before anything is cut. Usually the position can move a short distance, and we mark the nearest clear alternative so your crew can carry on the same visit. Where it cannot move, such as a fixed MEP penetration or a structural opening, that becomes a decision for your engineer or consultant, not something we cut through and report afterwards.
Which areas of the UAE do you cover?
All seven: Dubai, Abu Dhabi (including Al Ain), Sharjah, Ajman, Umm Al Quwain, Ras Al Khaimah and Fujairah. We are based in Al Khabeesi, Deira, Dubai, where both instruments are kept, and bring everything needed to scan, mark and report on the same visit. Dubai, Abu Dhabi, Al Ain, Sharjah, Ajman, Ras Al Khaimah and Fujairah each have their own page for concrete scanning and for ground surveys.
Can you work at night or in a trading mall?
Yes. A large share of our Dubai work is in trading malls, live hotels and occupied offices where the work happens at night or in shutdown windows. GPR needs no exclusion zone, so adjacent areas stay open. For core cutting in occupied buildings we contain the slurry and hand the area back clean. Where the building requires a permit or an escort for out-of-hours access, we work to its process.
What sizes of core holes can you cut?
From 12 mm to 500 mm diameter, in concrete, block and masonry, vertically, horizontally or overhead. Every hole is scanned with the GP8000 first, so it goes into a cleared position.
Do you also do excavation, interlock paving and cargo support?
Yes, as secondary services that follow the scan. We excavate to our own GS8000 survey, lay and re-level interlock paving and site roads, and provide route survey and escort support for oversized loads. Scanning is the core of what we do; these services exist so one contractor can carry the job from the survey to the finished work.