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Building Industry Research and Materials Testing
News Release from: TRADA Technology | Subject: Wood Information Sheet
Edited by the Buildingtalk Editorial
Team on 19 October 2006
TRADA reviews external use of wood based
panels
TRADA Technology publish a revised Wood Information Sheet for the specification and use of wood-based panels in external conditions.
TRADA Technology has stressed that while certain types of wood-based panels can be used in demanding exterior situations, to provide the desired performance and service life they must be correctly specified, detailed, installed and maintained This is the advice given in a revised Wood Information Sheet, Specification and use of wood-based panels in external conditions
This article was originally published on Buildingtalk on 5 Sep 2005 at 8.00am (UK)
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Exterior use covers a wide range of situations, from full exposure, where the panels may be in contact with salt or fresh water, to more protected situations where there is a risk of occasional wetting, such as soffits under porches and lorry decks.
There are two key factors when specifying wood based panels for exterior use: 'service class' and 'hazard class'.
Service classes are used in structural design to define the environmental conditions in service which affect the mechanical performance of the panel under certain humidity and/or wetting conditions.
Three service classes are defined in the structural design codes, BS 5268-2 and BS EN 1995-1-1, defined in some of the European (EN) panel product standards as "dry", "humid" and "exterior" conditions respectively.
Hazard classes (or Use classes as they are likely to be termed in future) deal with the risk of biological attack in the form of fungi or insects.
TRADA members and registered users may view the Wood Information Sheet on the askTRADA website (visit the Library).
Members will receive a copy with their regular membership mailing or may download a PDF file free of charge.
To purchase a copy, please visit the website.
Cost is £6.00 plus postage and packing.
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