Marshall-Tufflex dry lining boxes are available with Envirograf intumescent (fire barrier) pads. With fire barrier pads fitted, boxes comply with the requirements of BS7671:2008 IEE Wiring Regulations and Document B of the UK Building Regulations.
In the event of a fire, the cover plate of a socket, switch or light fitting may sag and disintegrate, leaving a perfect escape route for a fire to travel up the cavity, into an adjoining room or ceiling. When Envirograf pads are fitted, they will expand in the presence of heat and create an effective fire barrier. This solution has been specifically designed to help electrical contractors and building design professionals meet and comply with the current regulations.
Please note that these product properties are not a replacement for the manufacturer's literature and it is always recommended that Marshall-Tufflex is consulted before specifying.