Draft for “NTR Glulam” published

We are pleased to announce that a new proposal for definition and quality assessment of NTR classified preservative-treated laminated wood is now available for downloading. We are keen to get your questions and feedback on the document.

This document reintroduce the laminated products in the NTR classes and enable new production options, new NTR Class and quality control procedures. NTR classification for laminated products is a feature that has been increasingly requested by producers and building material suppliers as well as control engineers and product development specialists. The aim is to set the standard for treated laminated product in regards to quality and quality assessment.

File name: NTR classified preservative-treated laminated wood d3.pdf

Publication day: 2024-12-02

Click here to download the document

Send Feedback and questions to info@nwpc.eu

Comment on the latest version: Several updates compared to the version given in the NTR Conference in Helsinki.

Online information and hearing

To facilitate further dialogue and provide clarification, a hearing will be held on January 14 from 13:00 to 15:00. During the meeting, the document will be presented, and stakeholders will have the opportunity to ask questions and provide feedback.

The target audience includes staff and specialists working in Control bodies, producers of glued products and wood treatment plants, preservative manufacturers and other interested stakeholders.

Scheduled for January 14, 13:00–15:00

MS Teams

Click here to register for the meeting

Meeting link will be sent to registered persons.

Background Information

In recent years, there has been growing interest from producers of glued laminated timber products and building material suppliers in offering NTR classification. The current version (2017) of NWPC Document No 1 does not include such products. However, EN 351-1 and earlier versions of Document No 1 (2011 and 2013) did allow the inclusion of glued laminated timber, provided it met penetration and retention requirements.

The NWPC has initiated efforts to formally reintegrate glued laminated timber products into the NTR system for preservative-treated wood. This new document should be regarded as supplementary to NWPC Documents No 1, part 1 (2017), and NWPC Document No 3, part 1 (2017).

We look forward to your participation in the public consultation and hope to see you at the hearing.