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JBI Batten |  | JBI is a sawn batten and is John Brash’s most popular product. It is fully graded to all aspects of BS 5534:2003 (with the exception of a final grade for knots and wane), which must be carried out on site (see John Brash Batten Grading Guide). JBI is marked to show the supplier, size, species, grade and treatment, and is packaged in easy to handle bundles of 10. Manufactured from high grade European Redwood (PNSY) or European Whitewood (WPCA), JBI is treated to BS 8417:2003, using Osmose Naturewood, and it carries a 60 year lifetime warranty against insect attack and wood rotting fungi, when used above the damp-proof course. | | | |
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