LOSP is the abbreviation for Light Organic Solvent Preservative, the name given to chemicals used in the treatment of all Weatherproof products. H3 is the hazard level which relates to the amount of treatment and the recommended worse case application. While this H3 treatment level applies to above ground, weather-exposed applications, Woodhouse Weatherproof can be used internally.
Kiln Drying ensures that all Weatherproof retains its dimensional integrity and does not distort when used onsite. In simple terms the timber maintains its original size, shape and strength grading. All radiata is dried to an average moisture content of 12-15%, ensuring the versatility of Weatherproof when used in all construction. Finger Jointing is the process of removing defects from the wood fibre and mechanically joining the pieces of radiata into longer, straighter lengths.