BSI is calling for input to develop new standard on the extended application of fire performance results for external cladding systems.

A new standard for the extended application of fire tests results for external cladding systems, known as BS 9414 Fire performance of external cladding systems – Extended application of results from BS 8414-1 and BS 8414-2 tests, is now open for public consultation. Views are being sought from industry practitioners, regulators, fire safety specialists and consumer organizations. The consultation is open until 8 April 2019 and comments can be submitted online at:

BSI was requested by the Ministry of Housing, Communities and Local Government to work with a broad range of stakeholders to produce a standard approach to the extended applications of relevant results from BS 8414 tests, following the tragic fire at Grenfell Tower in West London on 14 June 2017.

This new standard, BS 9414, will provide the guidelines which should be applied when assessing the implications of modifications in relation to cladding systems which have been subjected to single or multiple tests in accordance with BS 8414 part 1 or 2.

The new BS 9414 relates only to the extension of results of an external cladding system which has been previously tested in some form in accordance with BS 8414-1 or BS 8414-2.  It does not provide a means of assessing external cladding constructions which incorporate multiple systems.