Five different suppliers’ fire doors fail to meet requisite fire performance standard.

This is according to an investigation by the Ministry of Housing, Communities and Local Government, which began following the Grenfell Tower disaster.

The MHCLG found that a Manse Masterdor fire door, the make that was used in Grenfell Tower, failed a 30 minute fire resistance test after 15 minutes.

It also tested doors from Masterdor, Permadoor, Solar Windows, and Bowater by Birtley – and found that they failed fire resistance testing on both sides.

A statement on Masterdor’s website said: “The company is currently undertaking one of the most extensive fire door testing programmes seen in the industry to establish the precise nature of the issue and to devise an appropriate fix.”

“Furthermore, every customer that has purchased a fire door from Masterdor since 2014 has been updated on the investigation and offered guidance and support.”

The Secretary of State for Housing, Communities and Local Government, James Brokenshire, has instructed major fire door suppliers to meet this week and agree a clear plan of action to tackle the failings, with weekly reports on progress.

Brokenshire will also be working with third party certification bodies to develop minimum standards of assurance. This involves a third party selecting a sample themselves, testing it, and then issuing a certificate if the fire door passes the test.

Niall Rowan, Chief Executive Officer of the Association for Specialist Fire Protection, estimates that just half of fire doors on the market are third party certified – and says this is not enough. He believes all fire doors should be third party certified.