Semi-rigid Rockwool stone wool to polythene damp proof course cavity closers.
Designed to close masonry cavities for fire, thermal and acoustic purposes; reduces cold bridging when closing cavities at door and window frames. Can accommodate movement in the building and allow for any irregularities in the cavity clips per length.
Fire performance to BS 476-20:
Four hours (maximum), assessed by Warrington Fire Reach Centre.
Surface spread of flame to BS 476-7:
Class 1 rated.
Can be used to prevent the passage of flanking sound within masonry cavities and complies with Building Regulations (E&W) Approved Document E 2003 and the requirements of Robust Details.
Ozone depletion potential of zero. No CFCs or HCFCs used in manufacture.
P12/360 Mineral wool rigid batts
P12/40 Mineral wool rigid batts
Cavity Fire Closers