Canadian Lumber Standard (CLS) Timber at
Boys and Boden - Building Merchants

Canadian Lumber Standard: Quality Graded Timber

CLS refers to timber that adheres to the Canadian Lumber Standard; it is specially kiln dried Whitewood that has been planed and finished with eased edges for precision. It is very popular in construction thanks to it being an affordably priced, strong timber of uniform shape and size with good resilience against fire.
Whether you are a large scale tradesperson, or simply doing some DIY, speak with our expert staff instore today to see how our extensive services and products can meet your construction needs.

Why use CLS Timber? 

The smooth rounded corners of CLS make it safe to handle. It also has knots away from the edges, this not only makes it look tidier and reduces splintering, but also decreases risk of fire spreading through the material. The smooth finish of CLS gives it an appealing look that holds paints, stains and preservatives exceptionally well. A common use for untreated CLS is in internal structural work and low-cost construction projects.

It is available in two prevalent grades, C16 and C24. Both are strong, though C24 has fewer defects. Visit any of our stores and we can provide all of the cutting, machining and cross cutting services you may require for your next project.

Contact us to request a quotation

Opening Times

7.30am - 5.30pm MONDAY to THURSDAY (except Welshpool opening from 7am)

7.30am - 5pm FRIDAY (except Welshpool opening from 7am)

7.30am - 4pm SATURDAY (except Shrewsbury 8am - 4pm)

10am - 4pm SUNDAY


FSC® products available on request. Please contact your nearest branch for further information.

Our History

Company No. 215444

VAT Reg No. 159 0430 72

Learn about the Boys & Boden legacy, from saw mill to venerable builders' merchant.

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Boysa and boden staff photo 1945
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