Timber Topics March 2026 | Use Classes

by Jennie Ward|02 March 2604 March 26|Build, Supply

As the weather clears and merchants prepare for the spring uplift in decking, fencing and landscaping sales, there is one message that deserves absolute clarity: Use Class 4 is not optional, and it is not open to interpretation. Here, TDUK explains what merchants need to know to sell the right...

Timber Topics February 2026 | External Cladding

by Jennie Ward|01 February 2601 February 26|Build, Supply

As cold weather approaches, make sure you have sufficient stock of fence panels so that customers can fulfil any repair work if the UK faces heavy storms over the coming months. TDUK is also reminding all merchants to make sure your teams know the different timber treatment Use Classes, so...

Timber Topics August 2025 | Timber Use Classes

by Jennie Ward|29 July 2524 September 25|Build, Supply

Do you know your Use Classes? The way treated timber must be described in merchants and on site has changed. It’s up to you to understand what Use Class the treated timber products you stock have been treated to, and where it is safe for them to be used. TDUK...

Timber Topics July 2025 | Understanding external timber cladding

by Jennie Ward|27 June 2524 September 25|Build, Supply

To support best practice across the industry, TDUK – working in collaboration with the Timber Decking & Cladding Association (TDCA) – has created the Timber Cladding Handbook, a valuable resource available at www.timberdevelopment.uk.

Timber Topics December 2024 | Use Classes

by Jennie Ward|05 December 2423 April 25|Build, Supply

Do you know your Use Classes? The way treated timber must be described in merchants and on site has changed.

Timber Topics May 2024 | Timber Treatments

by Jennie Ward|02 May 2423 April 25|Build, Supply

Timber Development UK and The Wood Protection Association are working to improve merchants’ knowledge of the different timber treatments and when they should be used. In this month’s Timber Topics, TDUK offers some top tips on how to make sure you’re talking the right language when it comes to timber...

Make sure it’s UC4

by Jonathan Gutierrez|02 February 2409 February 24|Supply

Independent accreditation of wood treatment operations is now a requirement for Timber Development UK (TDUK) members To ensure that you buy the product that has had the right treatment, first it is important to understand which is the right treatment. The WPA Benchmark Approval Scheme provides quality assurance for wood...

WPA Code of Practice – Industrial Wood Preservation

by Jennie Ward|11 January 2414 May 25|Build

This WPA Code of Practice provides detailed guidance on industrial wood preservation for specifiers, wood treaters and those involved with using treated wood.