Concrete Scanning and Surveys for Construction Projects
GPR concrete scanning, rebar detection, post-tension surveys and NDT testing for Tier 1 contractors, fit-out firms, M&E contractors and drilling and coring specialists.
The Survey Partner for Construction Projects
Construction projects move fast. Delays caused by hitting reinforcement, post-tension cables or buried services during coring, drilling or cutting are costly — in time, in remediation and in programme risk. ACUO provides the GPR concrete scanning and NDT surveys that keep intrusive works on programme and on budget.
We work directly with Tier 1 and Tier 2 principal contractors, fit-out and refurbishment firms, mechanical and electrical contractors, and specialist drilling and coring companies. Our surveys are fast to mobilise, clearly reported and priced to suit construction budgets.
ACUO is Constructionline Gold and SSIP accredited — the standard required by most principal contractors and their supply chain approval processes. All surveys are carried out by Gary Stringer, a GPR NDT Civil Engineer with over 20 years of experience on construction and civil engineering projects.
Get a quote for your project
Tell us the element to be scanned, the works planned and the site location. We'll provide a fixed-price quotation, typically within 24 hours.
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Contractor Types We Serve
Tier 1 and Tier 2 Principal Contractors
Pre-coring and pre-drilling GPR surveys, post-tension slab scanning, void detection and NDT condition surveys for major construction and refurbishment projects. Fast mobilisation across London and the South East. Constructionline Gold and SSIP accredited for straightforward supply chain approval.
- Pre-coring and pre-drilling concrete scanning
- Post-tension cable detection before slab penetrations
- Void detection beneath slabs and paved areas
- NDT condition surveys for structural assessments
Fit-Out and Refurbishment Contractors
Fit-out and refurbishment projects involve extensive coring, drilling, cutting and fixing into existing concrete structures. GPR scanning before every penetration identifies reinforcement, post-tension cables and embedded services — preventing damage, programme delay and the cost of remediation.
- Rebar and post-tension scanning before coring and drilling
- Embedded conduit and service mapping before cutting
- Cover depth surveys for fixing and anchor design
- 3D slab scanning for complex reinforcement layouts
Mechanical and Electrical Contractors
M&E contractors routinely core and drill through concrete slabs, walls and columns to route services. A GPR scan before each penetration confirms the safe zone — avoiding reinforcement, post-tension tendons and existing embedded services. We work directly with M&E teams on site, providing marked-up safe zones and written confirmation for the project record.
- Safe zone marking for service penetrations
- Post-tension slab scanning before M&E coring
- Embedded conduit and pipe mapping
- Written confirmation for project records and CDM compliance
Drilling and Coring Specialists
Specialist drilling and coring contractors are the last line of defence before a drill bit hits a post-tension tendon or a rebar. ACUO provides rapid-response GPR scanning to confirm safe zones before every core — on the day, on site, with on-slab mark-up and written confirmation. We work with drilling contractors directly and as a subcontractor to principal contractors.
- Same-day and next-day GPR scanning for urgent coring programmes
- On-slab mark-up of safe zones and hazard locations
- Post-tension tendon detection in all slab types
- Written safe-to-core confirmation for project records
Constructionline Gold and SSIP Accredited
ACUO is Constructionline Gold accredited — the pre-qualification standard required by most Tier 1 and Tier 2 principal contractors and public sector clients. Constructionline Gold verifies financial standing, health and safety management, environmental management, quality management and equality and diversity policies.
ACUO is also SSIP (Safety Schemes in Procurement) accredited, confirming compliance with the core criteria of the CDM Regulations and the health and safety standards required by principal contractors and their supply chains.
Both accreditations are current and can be verified through the Constructionline and SSIP portals. We can provide certificates on request.
Constructionline GoldSSIP AccreditedWhat Sets Us Apart on Construction Projects
Fast mobilisation
We mobilise across London and the South East within 24–48 hours of instruction. For urgent pre-coring surveys, same-day attendance is often possible.
On-site mark-up
Safe zones and hazard locations are marked on the slab in spray paint or chalk on the day of survey. No waiting for a report before works can proceed.
Written confirmation
Every survey is followed by a written report with annotated photographs, depth data and safe zone recommendations — suitable for the project record and CDM file.
Constructionline Gold and SSIP
Pre-qualified to the standard required by most principal contractors. Straightforward supply chain approval with no additional pre-qualification questionnaires.
20+ years' experience
All surveys carried out by Gary Stringer, a GPR NDT Civil Engineer with over 20 years of experience on construction, civil engineering and refurbishment projects.
Fixed-price quotations
Clear, fixed-price quotations with no hidden extras. Typically provided within 24 hours of enquiry.
Services Used on Construction Projects
Frequently Asked Questions
- How quickly can you attend site?
- We typically mobilise within 24–48 hours of instruction across London and the South East. For urgent pre-coring surveys where a drilling programme is at risk, same-day attendance is often possible — call 07340 549892 to discuss your requirement.
- Are you Constructionline Gold accredited?
- Yes. ACUO is Constructionline Gold accredited and SSIP accredited. Both accreditations are current and can be verified through the Constructionline and SSIP portals. We can provide certificates on request.
- Can you work directly with our drilling contractor?
- Yes. We work directly with drilling and coring contractors on site, providing on-slab mark-up of safe zones and written confirmation before each core. We can be instructed directly by the drilling contractor or by the principal contractor.
- Do you provide written confirmation for CDM records?
- Yes. Every survey is followed by a written report with annotated photographs, depth data and safe zone recommendations. The report is suitable for inclusion in the project health and safety file and CDM documentation.
- What areas do you cover?
- We cover London, Kent, Surrey, Essex, Hertfordshire, Berkshire and the wider South East as standard. We also carry out surveys UK-wide for the right project. Call 07340 549892 to discuss your location.
Constructionline Gold
Verified supply chain accreditation
SSIP Accredited
Health & safety pre-qualification
20+ Years Experience
Structural NDT specialists since 2003
Typical 24-Hour Response
Fast turnaround on quotes and bookings
Need a survey?
Call 07340 549892 or get a quote within 24 hours.