scope:

This European Standard prescribes the classification requirements for the durability of the reaction to fire performance of fire-retardant treated wood-based products to be used in interior and exterior end use conditions. The products shall initially meet required reaction to fire classification. In addition, products for exterior use shall meet the minimum durability of reaction to fire performance requirements specific to the end use. For interior use, limited hygroscopicity shall be verified. For exterior use, the reaction to fire performance level shall be maintained after accelerated or natural weathering. The requirements are applicable for fire retardant treated (impregnated and/or surface treated) solid wood and wood-based products. The products may be coated. The requirements for interior end use may be applied for all permanent uses of fire retardant treated woodbased products including, eg furniture and fire-retardant treated cellulose and wood-based insulation products. Mechanical properties and biological durability of fire-retardant treated wood products are not covered by this European Standard. This standard may be used as a basis for an approval system.