The Current Standard BS 5534:2003

Species are now identified by their code, 25x50 has to be used for single lap tiling and importantly marking is now a requirement. With marking there is also a requirement to identify grade. For the first time quality and the grade of the roofing batten is highlighted.
 
John Brash is the UK's leading supplier of quality graded timber battens to the construction industry. It has always advocated the need for quality battens and was the first company to introduce a marking system clearly identifying supplier, species, size, treatment and grade.
 
John Brash was also the first company in Europe to offer fully graded battens – JB-RED
 
To help the roofing trade comply the NFRC have also published a handy technical bulletin TB33 illustrating how the roof can comply with the new Standard.

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