Treated wood marking

Transition from CE to CA for marking treated wood products
New rules apply due to Brexit 
November 2021

WPA Guide to Marking Treated Wood-1.jpg

Marking of construction products (those and only those covered by a harmonised European standard) became mandatory in the EU on 1 July 2013 under the Construction Products Regulation (CPR). 


From the end of the Brexit transition period (31 December 2020) new rules apply in the UK outside of N. Ireland and separately in N. Ireland.

The new rules, covering the changes to marking, Declaration of Performance (DoP) and notified (EU)/approved (UK) bodies, are explained in the Timber Trade Federation publication TTF UKCA Guide

The government announced on 24 August 2021 that businesses will have an extra year to start using UKCA marking – the new date from when UKCA marking becomes obligatory is now 1 January 2023, although the UKCA mark could be used in GB from 1 January 2021.

As part of our extensive library of important member resources, WPA have reissued comprehensive guidance to how these changes impact timber products treated with either a wood preservative or flame retardant, such as cladding or noise barriers.


For the latest information download the Information document