30 minute-rated insulated roof lining

Internal linings specialist, British Gypsum, has a ceiling lining board that combines high levels of thermal insulation with 30 minutes fire resistance.

Developed in conjunction with a major housebuilder, the lining board is an extension of the company’s Gyproc ThermaLine SUPER range, specially developed to satisfy the fire performance requirements for ceiling membranes in ‘room-in-the-roof’ constructions.

A laminate of 15mm Gyproc FireLine, a special fire-resistant plasterboard, and 40mm high performance phenolic foam, the 55mm board includes an integral vapour control layer to prevent condensation in the roof construction, and can be used in combination with Isover glass wool insulation to achieve ‘U’ values down to 0.19 W/m² K in standard 175mm X 47mm timber rafter constructions.

Fixed directly to the underside of the joists using 90mm drywall screws, the board offers all of the usual benefits of an insulated dry internal lining, and can be jointed and decorated in the normal way to give smooth monolithic appearance.

It is available to order from leading builders’ merchants and stockists.

More information: www.british-gypsum.com