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There should be a 75 mm gap between the top of the finished brickwork and the top of the rafter. This will provide a space for the insertion of a non-combustible fire blanket without affecting the line of the roof. The tile battens should not cross over the fire wall but should be cut flush with the edge of the brickwork. The galvanised steel strap should overlap the fire wall by a minimum of 120 mm.
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