The Department for Education announced it has contacted 156 schools in England warning them that their buildings contain a dangerous substance called reinforced autoclaved aerated concrete
The Department for Education announced it has contacted 156 schools in England warning them that their buildings contain a dangerous substance called reinforced autoclaved aerated concrete .
It started being used predominantly in public sector roof construction in the UK and parts of Europe in the 50s and continued to be used until the 90s, but the material has been found to have structural issues that means it begins to deteriorate after 40 or 50 years. That means much of the RAAC that remains in British buildings is now at risk of causing a collapse.
“Tens of thousands of these structural panels exist across a broad cross-section of buildings, many constructed in the 60s and 70s, and many are showing signs of wear and tear and deterioration. The vast majority form the roof of the structure, usually flat, and hence are difficult to access, survey, maintain and replace.”
Professor Goodier said it is RAAC “from the 50s, 60s and 70s that is of main concern, especially if it has not been adequately maintained”.
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