Envirograf Internal Roof Fire Break Barrier

About Internal Roof Fire Break Barrier

An internal barrier designed to inhibit the spread of fire and smoke from one roof space to another. Ideal for use in terraced and semi-detached houses. This product is economical and it can be fitted quickly and easily by one or two fitters working from inside the roof space.

In a recent test carried out, an unprotected roof collapsed at 39 minutes, whereas the Envirograf Fire Barrier Curtain maintained protection from one roof to the next, providing valuable time for the rescue services to arrive on site.

• Offers full smoke protection and up to 81 minutes fire protection
• Quick and easy to install on all roof designs
• Provides both Class 0 and Class 1 spread of flame protection
• Maintains integrity of existing weatherproofing

Application Instructions

Only one side of a house needs to be sealed; one side of a semi-detached house or one side of a terraced house, next to the party wall.

• Cut the existing roofing felt next to the party wall and up to the first truss away from the wall. This can be discarded.
• Using supplied intumescent adhesive, adhere the fireproof sponge between the battens, filling the gap between the top of the party wall and the underside of the tiles or slates.
• Apply a coating of the adhesive to the truss.
• Fix the fire barrier curtain to the truss, ensuring that the coloured side is upward.
• Fix the battens over the fire barrier curtain and nail to the truss with 30mm clout nails.
• Apply adhesive to the underside of the tile battens to help hold up the fire barrier curtain, then apply adhesive to the wooden truss, near to the party wall or to the wall itself.
• Stretch the fire barrier curtain under the tile battens, over to the truss or wall and press onto the applied adhesive.
• Fix the batten with 30mm clout nails through the fire barrier curtain, into the truss or wall. The fire barrier curtain can be installed in sections, starting from the eaves downward, with an overlap joint of 50mm.
• Adhere the overlap joint with supplied intumescent adhesive.