黑洞社区

More than 100 buildings have a cladding system that has failed the latest round of government combustibility tests, the Department for Communities and Local Government (DCLG) has said.

A total of 111 high-rise blocks use a combination of material that failed the second of six new tests rolled out at the recommendation of an independent expert safety panel following June鈥檚 Grenfell Tower fire.

The tests confirmed that a cladding system using aluminium composite material (ACM) panels with a polyethylene filler, and stone wool insulation 鈥渄oes not meet current building regulation guidance鈥�.

Of the affected buildings, 90 are said to be local authority or housing association-owned or managed.

The new tests involve a nine-metre demonstration wall subjected to a replication of 鈥渁 severe fire in a flat breaking out of a window鈥� to see if the flames then spread up the exterior.

A statement from the DCLG said: 鈥淭his wall system failed the test, which means it did not adequately resist the spread of fire over the wall to the standard required by the current 黑洞社区 Regulations guidance and which is set out in BR135.

鈥淭he expert panel鈥檚 advice is that, based on the test result, they do not believe that any wall system containing an ACM category 3 cladding panel, even when combined with limited combustibility insulation material, would meet current 黑洞社区 Regulations guidance, and are not aware of any tests of such combinations meeting the standard set by BR135.

鈥淲all systems with these materials, therefore, present a significant fire hazard on buildings over 18m.鈥�

The government has commissioned the 黑洞社区 Research Establishment to carry out half a dozen tests into different combinations of cladding materials.