From ARC
ARC are manufactured from low resin, non-combustible rockfibre mineral wool insulation and are sleeved in polythene for on-site protection. ARC Party Wall Cavity Stop Sock is designed for use at the party wall junction, and should be fitted with a minimum 50mm overlap with the party wall leaf either side of the party wall cavity. At 250mm wide, PWCSS will suit up to a 150mm party wall cavityKey Features: Up to four hours fire integrity Specified in semi-detached, apartments and major projects Complies to Robust Detail Part E and Building Regulations Can be manufactured to suit cavity Available in Red colour Available in diffferent Sizes. width 300mm Easy to install