How to choose a concrete scanning company in the UK
Practical advice on choosing a UK concrete scanning company: qualifications, equipment, deliverables, and the questions that separate good from cheap.
Choosing the right concrete scanning company in the UK is mostly a question of distinguishing the companies that take the work seriously from those that have bought a GPR system and a website. The good ones are not always the cheapest, but the gap is usually smaller than expected — and the difference in quality is enormous. Here is how to separate them.
Qualifications
The first filter is qualifications. A defensible UK concrete scanning company will have:
- EuroGPR Certified Surveyors doing the actual work. Ask for the surveyor’s name and certification number.
- CSCS cards for site work.
- CHAS, ConstructionLine, or equivalent PQQ scheme membership.
- Professional indemnity, public liability, and employer’s liability insurance in date and at meaningful levels.
- Documented method statements and risk assessments as standard.
A company that hesitates on any of these is a company offering work that is hard to defend if anything goes wrong.
Equipment
The second filter is equipment. Modern, well-maintained, and calibrated equipment is the basis of good data:
- Ask what equipment will be used on your job (manufacturer and model, antenna frequency).
- Ask about calibration practice. The answer should be specific: calibration record traceable to the manufacturer, calibration check at the start of each session, calibration record supplied with the deliverable.
- Ask about pairing GPR with ferro scanning where the brief warrants it. A company that only carries one tool is a company that will use one tool whether or not it is the right one.
- For drone work, ask to see the UK CAA Operational Authorisation.
Reputable companies invest in calibrated, current equipment. Less reputable ones cut corners here.
Deliverables
The third filter is the deliverable. Ask to see a sample report from a recent comparable project. A defensible report includes:
- A clear scope and brief.
- A method statement and calibration record.
- Annotated plans and depth-accurate findings.
- CAD-ready DXF/DWG output.
- Photographs of the surveyed elements and the on-slab markings.
- Limitations and assumptions explicitly acknowledged.
- A surveyor sign-off by name.
If the sample report is opaque, jargon-filled, or anonymous, the project deliverable will be too.
Speed of response
The fourth filter is responsiveness. A reputable company:
- Responds to enquiries within the same working day.
- Provides a written quote with a clear scope.
- Confirms attendance and method before the job.
- Delivers the report within an agreed timeframe (typically the morning after a typical job).
Slow response, vague quotes, and missed deliverable dates are warning signs. If they show up before contract, they will show up during the work.
Sector experience
The fifth filter is sector experience. Concrete scanning on a commercial fit-out is different from concrete scanning on a heritage listed building, which is different from concrete scanning in a nuclear environment. Ask for recent comparable projects in your sector.
For specialist environments (rail, nuclear, defence), ask about specific competencies: Sentinel cards for rail, vetted personnel for nuclear and defence, conservation engagement for heritage. A company with the right experience volunteers it; a company without the right experience often won’t realise they don’t have it.
The conversation
A useful test is the quote conversation itself. A good surveyor on the call:
- Asks about the structure type, history, and brief.
- Picks up on details that suggest specific risks (post-tension construction, dense reinforcement, small access).
- Suggests an appropriate method, including pairing of techniques where useful.
- Quotes precisely against scope, with a clear rationale.
- Volunteers limitations rather than over-promising.
A poor surveyor on the call:
- Quotes off a price list with no engagement with the specific job.
- Doesn’t ask the questions a competent surveyor would ask.
- Promises certainty that the technique cannot deliver.
- Can’t articulate what they actually do on a typical job.
The quote call tells you a lot. Use it.
The price
Price is rarely the deciding factor between defensible companies, but it is sometimes a useful signal. Concrete scanning in the UK has a competitive market with reasonably consistent pricing. A quote that is dramatically cheaper than the rest typically reflects:
- Less qualified personnel.
- Older or uncalibrated equipment.
- Compressed timeframes that compromise the work.
- Reduced scope of deliverable.
A quote that is dramatically more expensive than the rest is sometimes premium service, sometimes opportunistic. Ask what justifies the difference.
Red flags
Specific things to watch for:
- Inability to produce insurance certificates on request.
- Vague answers about EuroGPR certification.
- Quotes without a written scope.
- Sample reports that do not address limitations.
- Surveyors who promise to “find everything” or to give “definitive” answers a non-destructive method cannot give.
- Aggressive pressure tactics on small jobs.
Any of these should prompt a careful re-examination before commissioning.
A short checklist
Before signing a quote:
- Verify EuroGPR certification of the surveyor doing the work.
- Receive insurance certificates and PQQ scheme references.
- Read a sample deliverable from a comparable project.
- Confirm the equipment to be used and the calibration practice.
- Confirm the deliverable formats and timescales.
- Check sector experience matches your project.
The half-hour spent on this checklist saves significant exposure later. Choosing well at this stage is the single biggest determinant of how the rest of the engagement will go.