Reinforced Autoclaved Aerated Concrete (RAAC)

Despite its advantages as a lightweight and cheaper alternative to standard concrete, Reinforced Autoclaved Aerated Concrete (RAAC) has faced challenges, particularly concerning its long-term structural integrity when used in schools, hospitals and other public buildings as reported in the news.

RAAC possesses a lifespan of approximately 30 years but is less durable in comparison to conventional reinforced concrete. Its structural characteristics deviate significantly from those of traditional concrete. In particular, when subjected to moisture and water ingress, RAAC becomes vulnerable to structural failure, as the aerated nature of the material can facilitate water infiltration. In the event of water penetration, the reinforcing steel within RAAC may corrode, rust, and cause the RAAC panel to lose its strength.

RAAC Surveys

As members of The Institution of Structural Engineers (IStructE) RAAC Study Group and 1 of 6 contributors to the IStructE RAAC Investigation and Assessment Guide, we are well-positioned to offer initial advice and conduct additional examinations, as required, to determine whether your property’s roof, floors, and other structural elements contain RAAC.

A straightforward visual inspection, along with localised intrusive investigations if necessary, can reveal if the property was constructed using this material. If RAAC is present in your property, we can provide all necessary advice in relation to detailed investigations and any necessary strengthening and monitoring works.

Contact us on 01483 721721 or fill out the form below and we’ll be in touch.

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