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British western red cedar

British Cedar CladdingWeathered British Cedar Cladding
British cedar cladding | VHL7  Weathered British cedar cladding 

The majority of western red cedar cladding seen in this country is imported from North America and Canada. However, British cedar has been grown in our woodlands for over one hundred years and the mature trees are ideal for timber cladding production. As Canadian cedar becomes increasingly expensive, our British cedar cladding offers a significantly cheaper alternative and avoids the substantial environmental impact of shipping timber to the UK.

For a comparison between British and Canadian grown western red cedar watch our new video.

Freshly cut or machined, British cedar cladding has frequent small- to medium-sized dark knots and an amber colouring which, if left untreated, will bleach to a silver colour. It is faster grown than imported cedar and is therefore softer. Unlike most other coniferous softwoods, British cedar does not contain any resin so can take a range of paints, oils and stains.


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 British western red cedar
Base timber British western red cedar
Species Thuja Plicata
Process None
Origin Legal and well-managed forests in England and Wales.
Intended use External cladding
Other uses None
Appearance British western red cedar has a pink to amber colouring with frequent dark knots. The colouring of British WRC is paler, but more consistent, than its Canadian cousin.
Weathering When left untreated, cedar will bleach to a silver colour. Because of its relative consistency British WRC weathers more evenly than the Canadian. 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 + Heavy 2.4 and 3.6mt
Moisture content 16 – 25%
Natural durability (EN350-2) Durable Class 3
Insect attack Resistant. Wasps seem to like peeling the surface.
Desired service life:(BS8417) Occasionally wet 30 yrs
Frequently wet 15 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 British cedar is too knotty to be graded under any of the standards
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, could 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
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