All council-run schools in the Royal Borough of Windsor and Maidenhead responded to government requests for information on dangerous concrete in buildings, the council has confirmed.

It comes after a Catholic school in Ascot – not run by the council – has had to move classes to marquees after the dangerous RAAC concrete was found in its building.

The government told more than 100 schools to close after they were found to contain reinforced autoclaved aerated concrete. This form of concrete contains tiny holes that make it more brittle, and allow water in that can cause metal bars inside them to rust.

It was used in construction between the 1950s and 1990s, and many more than the 156 schools the government has identified could contain it, along with other buildings.

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St Francis Catholic Primary School in Coronation Road, Ascot, is among the schools contacted by the Department for Education last week. It has now built temporary classrooms on the school playing field while work to make the buildings safe takes place.

The government has faced criticism for not publishing the full list of schools with RAAC concrete, and for not acting faster on schools it had already identified with the concrete.

Government education secretary Gillian Keegan said that the government had sent surveys to identify RAAC to some 15,000 schools but that ten percent – some 1,500 – had not yet returned them.

A spokesperson for the Royal Borough of Windsor and Maidenhead confirmed that all community and voluntary controlled schools the council was responsible for had returned the survey and no RAAC was found.

But they noted that St Francis Catholic Primary School is run by an academy trust, and so couldn’t comment on its behalf.

READ MORE: council to inspect schools for RAAC concrete

Councillor Amy Tisi, Cabinet member for children’s services, education and Windsor, said: “We understand this is a worrying time for schools, parents and pupils.

“At this stage, we are not aware of any RAAC (Reinforced Autoclaved Aerated Concrete) in any state schools in the Royal Borough, with the one exception of St Francis Catholic Primary School in Ascot. RAAC was identified in part of the school in July 2023, and the affected areas were closed.

“In liaison with the Department for Education and the council, the academy trust responsible for St Francis has arranged alternative classroom accommodation on-site to allow the school to re-open to all pupils at the start of the new academic year and has been in touch directly with parents around those arrangements.

“The Royal Borough continues to work closely with the Department of Education on its programme of RAAC identification in schools, and schools will keep parents updated with any developments.”