RAAC surveys in Bradford-on-Avon are carried out by NDTScan, the UK's specialist in the identification and analysis of reinforced autoclaved aerated concrete. The planks were installed in Wiltshire buildings for nearly forty years, mainly in flat and shallow-pitched roofs, and they are now well beyond the design life their manufacturers assumed. Identifying them is the first step; understanding their condition is the one that matters.
Bradford-on-Avon does not feature on the government lists of confirmed RAAC, which only ever counted schools, colleges and hospital sites. The construction itself was used across Wiltshire for three decades in council buildings, housing, community halls, offices and light industrial units. Where a flat or shallow roof dates from 1955 to 1995 and its make-up is unknown, NDTScan's advice is to identify it before the next winter rather than after it.
A RAAC survey from NDTScan starts with identification. Ground penetrating radar separates aerated planks from dense concrete, hollowcore and timber decks plank by plank, and the reinforcement pattern, transverse bars and plank widths confirm the reading without opening the roof. Condition comes next: cracking, deflection, end bearing, water staining, corrosion and previous repairs are recorded for each plank, and the findings are classified in line with IStructE guidance so the Bradford-on-Avon owner can see at once which elements need action, which need monitoring and which are sound.
The most expensive mistake in Bradford-on-Avon, as everywhere else, is to act on RAAC before it has been understood. Whole buildings have been closed on the strength of a visual inspection that could not tell RAAC from hollowcore. NDTScan's position is that identification and condition assessment come first, remediation second, and the report has to be good enough to design from.
Scan before you repair. That is the standing advice for every Bradford-on-Avon client, and the reason NDTScan reports what the concrete contains before anyone specifies what to do about it.
Services Available in Bradford-on-Avon
- RAAC Identification Survey GPR based, plank by plank identification of reinforced autoclaved aerated concrete in roofs, floors and walls across Bradford-on-Avon. Confirms what the element is made of without opening it up, and records plank widths, reinforcement and bearing details as evidence.
- RAAC Condition Assessment Plank level inspection of confirmed RAAC for cracking, deflection, bearing length, water ingress, corrosion and previous repairs, classified in line with IStructE guidance. Reported so a Wiltshire engineer or estates team can act on it directly.
- RAAC Management and Reinspection Monitoring regimes, reinspection intervals and management plans for RAAC that is being kept in service, plus expert input where a Bradford-on-Avon owner needs an independent second opinion on a survey or a remediation proposal.
RAAC in and around Bradford-on-Avon
Around Bradford-on-Avon the work divides into four kinds. Owners who do not know what their roof is made of and need it identified. Owners who know it is RAAC and need every plank assessed and classified in line with IStructE guidance. Estates teams who need a management plan and a reinspection regime for planks staying in service. And Wiltshire clients who have a survey or a remediation proposal in front of them and want NDTScan's independent view before committing money. Public bodies, housing providers, insurers and private owners all instruct on the same basis.
NDTScan also provides RAAC surveys in Swindon, Salisbury, Trowbridge, Chippenham, Stratton St Margaret and Calne and the rest of Wiltshire. The rest of the region is covered from the South West RAAC surveys page, and the service itself is described on the RAAC surveys page.
About NDTScan
NDTScan is a specialist non-destructive testing company based in Oxford and led by Neil Smuts, author of The RAAC Book. It is the UK's specialist in the identification and analysis of reinforced autoclaved aerated concrete, and a Level 4 UKCSS Operator, the first in the UK to achieve that certification. RAAC surveys in Bradford-on-Avon sit alongside the company's concrete scanning and structural condition survey work, and every report is written to a standard suitable for engineering acceptance, insurers and dispute work.