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Reinforced Autoclaved Aerated Concrete (RAAC)

Reinforced Autoclaved Aerated Concrete (RAAC)

RAAC, unknown to most until a week or so ago, is now a familiar acronym for many up and down the country.  AHDS understands that local authorities and local government are investigating sites where this material has been used (indeed, this work has been underway for several months) and will communicate directly with affected schools and their communities as well as reporting instances of concern to Government by Friday 7th September.

A Government statement to Parliament on this was made on 6 September which set out the work already undertaken (over many months) and underway.  You can watch that here Ministerial Statement: Reinforced Autoclaved Aerated Concrete | Scottish Parliament TV This includes commentary on the UK Government Education Department decision to close some affected schools in a change from the accepted approach to responding to RAAC.  The Scottish Government and local authority approach in Scotland remains aligned with the Institution of Structural Engineers guidance on investigation and assessment of RAAC.

For information about all instances of RAAC in schools, please see this Scottish Government page which links to information from each local authority affected: Local authorities publish RAAC data - (

If any AHDS member is affected, please do not hesitate to get in touch.  Initial contact should be made via your AHDS Area Officer