Use Class 4

Guidance for wood treatment
Guidance for Wood Treaters in the NTR Region
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Guidance for Wood Treaters in the NTR Region. Treatment Specifications used in the UK Market
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Understanding of UC4 grows
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Mystery shopper research among merchants shows that the supply chain's understanding of Use Class 4 timber treatments has improved since 2020. The Wood Protection Association (WPA), supported by Timber Development UK (TDUK), has long been fighting to improve knowledge of the different timber treatments and when they should be used....
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use class 4
Use Class 4 treated timber: specifying, buying and installing
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Preservative treatment provides wood with added durability (against decay and insect attack). But, it’s a mistake to assume that all treated wood is the same. The level of preservative protection required depends on where it is to be used.
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Developed by the Construction Products Association, CCPI is in response to one of the key findings of the enquiry into the Grenfell fire which confirmed that shortcomings in product information had contributed to the disaster.
Code for Construction Product Information (CCPI)
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The UK is raising the bar on performance information supplied with construction products with Isuue 1 of the CCPI, published in September 2021.
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Preservative Treated Wood
The Buyer’s Guide to Preservative Treated Wood
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The WPA Code of Practice for Industrial Wood Preservation groups the applications for treated wood into Use Classes
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Use class 4
Understanding Use Class 4 (UC4)
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Consumer and contract law require that any product offered for sale must be fit for its intended use and a wood product impregnated with preservative is no exception. The minimum standards for the treatment of wood are set out in British Standard BS8417 (Preservation of Wood: Code of Practice). In...
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