CLS Product Box Image copy

Construction Timber

CLS Timber

We supply both imported and homegrown CLS to the merchant and manufacturing sectors of the UK timber industry. Our long-standing partnerships with our sawmills ensure a stock of high-quality CLS, which we can supply in both full and part loads to meet all your CLS requirements.

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Product overview

“Canadian Lumber Standard” or CLS is kiln dried and ‘regularised’ timber finished on all sides giving a smaller cross-section than traditional sawn timber. Originating in the Canadian market, hence the name, it is mainly used for timber frame home construction and for internal and partition walls.

Treatment options available

2.4m to 5.4m lengths available

FSC® and PEFC certified options

Swedish strength and quality

Kiln Dried / ISPM15

Planed All Round / Eased Edge

Product details


CLS can be used for timber frame construction and internal walls. It is popular due to its high strength and durability, while its planed edges make it easy and safe to handle. It provides a cost-effective option against other types of construction timber with a great range of sizes available to suit any application.


Lengths (m):

2.4, 2.7, 3.0, 3.6, 4.2, 4.5, 4.8, 5.1, 5.4

Width and Thickness:

50mm x 75mm (Finished 38mm x 63mm)
50mm x 100mm (Finished 38mm x 88mm)
50mm x 150mm (Finished 38mm x 140mm)


High pressure and low pressure treatment offered to protect against decay and insect attack.

Treatment options

We supply direct to your yard or hold stock at our Cumbernauld site. We can do CLS in full or part loads with our other timber products.

We import from Sweden and Germany as well as stock homegrown products from our partnered Irish sawmills.

This product is FSC® and PEFC certified depending on the country of origin.


Our locations and partnerships span across Europe

Through a combination of our sales and customer service offices, stock locations and key manufacturing partners, we are able to work with merchant and manufacturing customers across the UK.

Our supply is heavily focused from the UK, Sweden, The Baltics and the rest of the EU, however, we also import specialist products from North America and China.

Sawmill map

Industry news

Our monthly e-newsletters provide key timber industry updates and information we think our customers will find useful, from changes in conversion rates and how Brexit is affecting the market, to key product launches and fun timber related facts!

GP 12

6 Jul, 2022

Timber Update July 2022

The Construction Products Association (CPA)'s latest report states that according to the S&P Global/CIPS UK Construction PMI, UK construction activity ...

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IMG 5324

29 Mar, 2022

Timber Update March 2022

The Timber Trade Federation (TTF) have advised its members to cease trading with Russia and Belarus due to the ongoing ...

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MTG 010

24 Jan, 2022

Timber Update January 2022

Global and EU-UK customs regulations saw various changes on 1st January 2022. The new requirements cover six areas, including new ...

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Speak to our team

To speak to one of our team, call us on 0203 794 9377 or email

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Giddings Visit June 09 7