DESCRIPTION

A lightweight and easy-to-use cavity wall barrier available in non-ventilated and ventilated versions and in various widths, for use in cavities in block or brick walls or between brick wallsand timber-framed buildings. It can be fixed across the cavity or it can be
self-supporting.

USE

There are six types of cavity wall barrier:

1. Non-ventilated wall barrier (WB) is made from impregnated cloth and galvanised wire mesh and is ideal for fixing to cavity walls before fixing door/window frames (see illustrations 5 & 6 on next page). It can be pressed into a V-shape to be self-supporting in the cavity (see illustration 12 on next page). The WB barriers can be fitted with a sponge as a cold bridge.

2. Ventilated wall barrier (VWB) is made from intumescent material adhered to impregnated cloth with reinforced kraft paper and galvanised wire mesh inside. It can have the following vent patterns:
pattern A has one row of small vents, pattern B has two rows of small vents, pattern C has three rows of small vents, pattern D has three rows of medium vents, and pattern E has three rows of large vents. See vent diagram.

3. In response to requests for a non-ventilated wall barrier like WB but with a facility to let moisture out and keep smoke out of the cavity, this can be ahieved with the VWBG barrier consisting of the standard WB barrier but with rubber grommets and plastic tubes coming out of the seal, through the brick/block joints to the outside (see illustration 10 on next page).

All the above barriers can be made to any width and 950mm or 1900mm standard lengths.

4. Non-ventilated wall barrier sponge (WBS). Compress the fireproof sponge into cavity. Can be adhered with intumescent adhesive (IA).

5. Ventilated wall barrier sponge (VWBS). Compress the fireproof sponge into cavity. It can have the following vent patterns: pattern A has one row of small vents, pattern B has two rows of small vents, and pattern F has one row of large vents. See vent diagram below. Can be adhered with intumescent adhesive (IA).

6. Non-ventilated waterproof Thermal Cavity Barrier (TCB) offers both fire protection and effective thermal protection around window
and door apertures.

VENTILATION HOLE PATTERNS

SPONGE

Standard Sponge Widths:
80mm, 135mm, 165mm, 210mm, 265mm

PERFORMANCE

Tested to BS476 Part 22 (1987), achieving up to 104 minutes integrity and 100 minutes insulation.

Also tested to BS476 Part 22 (1987) achieving 132 minutes. Tested to BE EN1363-1.

FOILED

Standard Foil Widths:
75mm, 120mm, 150mm, 200mm, 250mm