FRstop 1-hour fire-rated cavity stop sock. Designed to restrict the spread of flames within external masonry and to further minimise the effect of flanking noise pollution at wall junctions. Independently tested by Warrington Fire.
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FRstop cavity stop socks are lengths of low resin, non-combustible, rockfibre mineral wool sleeved in 35 micron polythene for on-site
weather protection
1 hour fire integrity and minimum 15 minute insulation
Independently tested by Warrington Fire
Polythene encapsulated cavity stop sock
Available in standard widths of 50, 75, 85, 90, 100, 115, 125 and 150mm
Special cavity widths are available on request up to 300mm
Meets the requirements of the Robust Detail, Approved Document B and NHBC Standards
Available in smaller quantities for convenience
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