Current
Building Supplement
Guidance Note
This document applies to the preservation of panel and engineered wood products, such as Particle board, oriented strand board, cement bonded particle board, fibreboard, hardboard and medium density fibreboard, and plywood. This guidance is also relevant to other products such as I-beams which include either a mixture of different wood-based composite products, or a mixture of wood based composite products and solid wood.
Issue 2, March 2023.
The Wood Protection Association (WPA) is a not-for-profit timber trade organisation. The WPA champions and provides advice on industrial wood treatment technologies that enhance the performance of softwood products. Covering: preservative treatments, wood modification and factory applied flame retardant treatments.
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
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