FRSTOP Fire-Rated Cavity Stop Sock

• 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

• Satisfies all NHBC requirements
• Complies with all relevant Building Regulations
• Meets all relevant British Standards
• Independently tested by Warrington Fire

• Manufactured using Rockfibre mineral wool
• Rockfibre uses no CFC’s, HCFC’s in the manufacturing process
• Thermal conductivity of Rockfibre insulation 0.037w/mK

• To calculate quantities divide the overall length of the required cavity wall run by 1.2m, allow an additional unit for each corner for cutting. Always round up to the next whole number.
• Determine and stipulate the cavity width that FRstop needs to suit

• The accredited construction detail published by DCLG require a minimum overlap of 30mm between the window frame and cavity closer.
• Cut into required lengths allowing the jamb section to overlap the sill section by cutting away parts of the fixing flange and butt the underside of the lintel.
• For second fix applications, the cavity closer is pushed into the open cavity after building work is complete. The compressible nature of the exposed insulation material is used to create a friction fit in the cavity, alternatively the insulation can be trimmed to fit using a sharp knife.
• Fixing nails to the flanges are recommended to ensure a secure fit.

F30 Accessories/sundry items for brick/block/stone walling
Clause
370 PREFORMED CAVITY TRAY / ACCESSORIES
• Manufacturer: Timloc Building Products, Timloc House, Ozone Park,
Howden, East Yorks. DN14 7SD. T: 01405 765 567 W: www.timloc.co.uk
• Types(s) and location(s): FRstop – thermal and acoustic fire stops to be
installed vertically and horizontally as work proceeds. Position where a
party wall meets the cavity wall or at floor levels, supplied in 1.2m lengths
and butt jointed.
• Reference: FRstop