Nhbc Roofing Battens

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Nhbc roofing battens.

Tiling batten sizes are either 25x38mm or 25x50mm depending on the tile design 19x38mm battens are no longer suitable see appendix 7 2f. The main roof underlay should be cut to the valley batten line a strip of underlay should be laid under the main roof underlay and held down by the valley battens where used. In accordance with bs 5534 accompanied by a delivery note and marked with the supplier origin grade and size. Roofing batten treated type a and nhbc compliant engineered batten bs5534 related products.

Battens and counter battens shall be adequately sized and spaced to support the roof covering. Ridge tiles need to be mechanically fixed for at least 900mm from the end and either side of a party wall. Nhbc standards extra issue 29 april 2004. Nhbc standards 7 2 s11 c states that not more than one in four battens should be joined over one truss or rafter.

Ridge and hip tiles should be mechanically fixed with self sealing non ferrous fixings into timber battens and have a nominal joint thickness of 10mm where wet bedded. Wet bedded baby hip ridge tiles to low level roofs such as those over porches and ground floor bay windows do not require mechanical fixing unless recommended by the.