Reinforced Autoclaved Aerated Concrete (RAAC)
On this page
What is Reinforced Autoclaved Aerated Concrete (RAAC)?
RAAC is a lightweight form of concrete used in the UK from the mid-1950s to the late-1980s, although recent examples date back to the 1990s. RAAC has been found in a wide range of buildings, which can be found in both the private and public sector.
The material was often most used in the construction of roofs and floors and is known to be less durable than other forms of concrete, particularly where it has been damaged by water or where it was not formed correctly during the original fabrication.
The position in NHS Lanarkshire
There has been a lot of media reports about the presence of RAAC in public sector buildings.
We understand that the presence of RAAC might be a concern for many. We want to reassure our patients, visitors and staff that their safety and well-being are our top priority.
In 2019 Heathcare Facilities Scotland (HFS), now NHS Assure, provided NHS Boards with guidance that some of our buildings may contain the use of RAAC and asked us to provide information on properties built within a certain time period with flat roofs.
In 2021 we commissioned structural surveys across a number of our buildings which fit the criteria set out in the guidance and it has been confirmed that Biggar Health Centre roof is the only location with RAAC. Inspections made clear that the roof was in good condition.
We continue to regularly inspect Biggar Health Centre to ensure there has been no deterioration and most recent survey we undertook in September 2023 has confirmed this is still the case.
Biggar Health Centre Update (updated August 2026)
We have completed a programme of works at Biggar Health Centre to address areas containing Reinforced Autoclaved Aerated Concrete (RAAC).
A follow-up inspection carried out in June 2026 confirmed that all previously identified high-risk areas have been repaired and are now classed as low risk. Additional areas identified during the inspection have also been remediated and downgraded to low risk.
As a result, all RAAC elements at Biggar Health Centre are now classified as low risk, and no urgent structural works are required.
The health centre remains safe to operate, with no impact on patient care or services. We will continue to monitor the building and manage the remaining low-level risk through routine inspections and maintenance.
A further structural inspection is planned within the next three years, or sooner if any concerns are identified.
