The Fireshield Permeable Walling Underlay with an intumescent coated surface is suitable for all walling applications, including those in multiple storey buildings. The underlay’s intumescent coating helps protect the substrate by reducing the risk of fire taking hold and significantly reduces the formation of droplets and smoke. It is installed and fixed to the substrate in the same manner as standard breather membranes using mechanical fixings. Install the underlay by fixing directly to the substrate ensuring vertical laps are staggered. Fireshield must be secured with fixings that are appropriate to the substrate and consideration should be made of the fire performance of the fixings. Please note that fixing centres should be no more than 450mm. Features and Benefits The unique intumescent coating helps protect the substrate Vapour permeable walling underlay for use either directly onto sheathing or insulation Suitable for applications over 18m high (11m in Scotland) BBA, LABC & LABSS Certified Product Specifications Length: 20m Width: 1100mm Thickness: 1.2mm Reaction to Fire: EN13501-1 B,s1,d0 UV Resistance: 3 months Water Vapour Transmission: Sd0.08m