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Our Wootton Bassett showroom is open for visitors by appointment. 

For cladding, beams, plank and flooring we take orders by phone and email. For collections and self-selected timber please make an appointment. Deliveries are limited to sites with easy access and forklift offload or a minimum of two people on site for manual offload.

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Canadian western red cedar

Canadian western red cedar claddingweathered Canadian western red cedar cladding
Canadian western red cedar | VSL1Weathered Canadian western red cedar | VHL6

Canadian western red cedar is the most popular choice for timber cladding projects in this country. This is simply because the wood is ideal for the job. Cedar originating from the Pacific West coast of North America and Canada grows is almost perfect conditions producing clean and slow grown timber. The wood is both naturally durable and relative stable when compared to other wood species commonly used for cladding. These two qualities ensure that cedar cladding boards continue to look smart for many decades.

Canadian western red cedar cladding is slow grown compared to our native cedar, resulting in a denser and darker wood. However, it is still a relatively soft timber that bruises more easily than timbers such as larch and oak. For a comparison between Canadian and British grown western red cedar watch our new video.

Customers specifying Canadian western red cedar should be aware of the wide colour variation in each batch. In the same pack, the colours can vary from light pink to dark brown. The vibrancy of the colours will fade over time, but the weathering process can be inconsistent and patchy.

The Export Grading Rule Book published by the Pacific Lumber Export Bureau classifies two grades for the export of Canadian western red cedar: ‘No 2 Clear & better’ and ‘No 4 Clear’. Although the grades can be bought separately, in the UK the two are commonly blended to produce a grade called No 2 Clear & better / 15% 4ths. This is the grade we offer as standard because we believe it combines quality and value for money.

In a typical selection of our Canadian western red cedar, the majority of the boards will be knot free, while the remainder will contain occasional knots. As with all trade grades, there is a lot of variation between supplier mills. However, we make every effort to ensure that the production we receive is among the best on the market.

Canadian western red cedar is the most expensive softwood cladding offered by Vastern Timber, although it is considerably cheaper than hardwoods such as oak and sweet chestnut. Canadian cedar is an ideal choice for modern designs where a relatively knot free appearance is desired and for applications where stability is a concern, such as painted cladding.


Technical Specification

Produced to comply with the harmonised standard for construction products regulation BSEN14915:2013 and to conform to BS8605-1:2014 External timber cladding: Method for specifying.

Trade Name Canadian western red cedar
Base timber Canadian western red cedar
Species Thuja Plicata
Process None
Origin Legal and well managed forests in Canada
Intended use External cladding
Other uses None
Appearance Canadian western red cedar has a strong, distinctive grain. The colours vary widely from dark chocolate brown to light pink. The boards are relatively free of knots giving a clean and contemporary appearance.
Weathering When left untreated, cedar will bleach to a silver colour although the process can be inconsistent and patchy. Northerly elevations may weather to a darker grey than those facing South.
Profiles All machined profiles
Dimensions 20×70, 20×95, 20×145, 20x195mm
Lengths Random 1.8 – 3.7mt +
Moisture content 16 – 25%
Natural durability (EN350-2) Durable Class 2
Insect attack Resistant
Desired service life:(BS8417) Occasionally wet 60 yrs
Frequently wet 30 yrs
Treatability class Resistant
Movement class Small
Resistance to impact Low
Resistance to fixing Low
Mean density 330 – 390 kg/M3
When to fix No restrictions
Grading BS1186-3 1990 Class 2. EN942:2007. J20. CE grade A. Clean with a few sound knots. (Commonly sold with the trade grade description No2 Clear & better, allowing 15% 4ths)
Working properties Good workability. Takes fixings satisfactorily. WRC is soft and relatively brittle which can result in bruising and splintering. No pre-drilling necessary.
Extractives Western red cedar contains reactive oils, which will corrode ferrous metals. When the two come into contact, a blue sludge is formed that will stain the wood and anything else it meets. All fixings used in conjunction with western red cedar should be stainless steel. The oil is brown in colour and could also leave unsightly brown stains on the surface of the cladding and will stain any porous materials below the cladding. The reactivity of the oil makes western red cedar cladding unsuitable for polluted areas and shaded areas.
Emission of formaldehyde (EN14915) E1 (Not significant)
Reaction to fire (EN14915) Euroclass F (Untested). D-s2, d0
Fire treatment Possible by impregnation
CE compliant Yes
While the utmost care has been taken to provide accurate information, Vastern Timber shall not be held responsible for any consequences arising from any errors or omissions on this website nor for any damages resulting from the use of the information.