John Brash updates roofing batten guide

John Brash has updated its 'Pocket Grading Guide for Roofing Battens', following the recent publication of the new British Standard for roofing battens BS5534:2003 +A1: 2010.

The Grading Guide sets out the latest grading requirements to meet the new standard, for roofing battens that have not been pre-graded or there is doubt over the grade.

BS5534:2003 +A1: 2010 has corrected an anomaly in the previous standard by making the maximum allowable size of side-knots, or through-knots (a knot appearing on both edges but not on the face) only 5mm, as opposed to the previous 15mm.

The new rules on distortion also mean that battens must be straight, with a new maximum tolerance imposed of 5mm measured over a length of 1.2m at a reference moisture content of 20 per cent .

The pocket-sized guide includes easy-to-follow information and diagrams showing how to also check for knot size and location, slope of grain and permitted wane.

The updated guide from John Brash is an essential reference for roofers and contractors to help identify non-compliant batten when grading on site.

John Brash's premium factory graded batten JB-Red is a suitable choice for roofers that want to avoid all the issues of grading on site.

JB-Red complies with the strength requirements of BS5534:2003 +A1:2010, the Code of Practice for Slating and Tiling.

The battens are characterised by their red stained finish and 'BS5534' stamp, confirming they have been stringently tested to ensure they meet the new British Standard, using production processes independently certified by the Building Research Establishment (BRE).

The company is the UK's first timber company to be awarded BRE's Tick Mark status for JB-Red, which recognises the company's excellence in grading and preservative treatment of its roofing battens.

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