In December 2018, the government introduced an amendment to the Building Regulations (SI 2018/1230), which prohibits the use of ‘combustible cladding’ in high-rise residential buildings above 18m.
The amendment delivers on the government’s objective of a ban on combustible cladding. It effectively prohibits the use of combustible materials anywhere in the external walls of buildings over 18m in height which contain one or more dwellings.
The external walls of buildings other than those described in Regulation 7(4) of the Building Regulations (i.e. any building with height above 18m including one or more dwellings) should either meet the guidance given in paragraphs 12.5 to 12.8 or meet the performance criteria given in the BRE report: Fire performance of external thermal insulation for walls of multi-storey buildings (BRE 135). The report considers build-ups of external walls using full-scale test data from BS 8414-1:2015 or BS 8414-2:2015.