We’ve all been hearing a lot in the media recently about the prevalence of RAAC.
We’ve taken the opportunity to learn a little more about the material and where it might affect people and buildings.
What is RAAC?
RAAC is a lightweight form of concrete; because it is weaker than regular concrete, concerns have been raised about its long-term durability.
The concrete is aerated and “bubbly”, contains no “coarse aggregate” and is less dense than traditional concrete, being around a third of the weight, according to a building consultancy. RAAC has an open texture with open-sided bubbles often visible. The surface is slightly crumbly when touched and easy to gouge with a screwdriver. If the concrete has been heavily painted or coated it may be harder to identify.
Where is it found?
RAAC was used widely in buildings constructed between 1950 and 1990. Although the media has reported its use largely in Educational buildings, the material was not restricted to educational or public buildings.
What are the impacts on your business?
First, ensure that your building is safe. This can be done by having your building professionally checked by an appropriately qualified building surveyor or structural engineer. The government has also produced some guidelines which can be found here.
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