Question to the Ministry of Housing, Communities and Local Government:

To ask the Secretary of State for Housing, Communities and Local Government, what estimate he has made of the number of buildings completed in England and Wales since 14 June 2017 that include (a) Celotex RS5000 insulation and (b) Kingspan K15 insulation.

The Government banned the use of combustible materials on the external walls of high-rise residential buildings in 2018. The ban was introduced to remove any uncertainty for building developers, designers, contractors and suppliers as to what materials are classified for use in the external walls of buildings.

The ban limits materials that can be used to those achieving the two highest classifications. We expect all cladding materials to have been subject to the relevant safety checks and approved before the material can be used on a building. We do not currently hold estimates of the number of buildings completed in England and Wales that include Celotex RS5000 insulation and Kingspan K15.