Western Red Cedar Decking


Western Red Cedar Decking When it comes to decking, there is no better wood than Western Red Cedar. Cedar wood is a unique species has been the material of choice for many years in North America. For the past ten years Western Red Cedar deck boards have been our best selling decking product, favoured by architects, contractors and homeowners alike due to its outstanding appearance and performance characteristics as modern deck boards.

Silva has established a reputation as one of the leading suppliers to the decking trade of Western Red Cedar in the UK, with large stocks, ready for immediate delivery. We work closely with our Canadian suppliers to ensure that our products are the very best available, exceeding grading rules and satisfying the needs of leading architects and designers.

Silva offers a comprehensive range of Western Red Cedar contemporary decking and railing components with two grades, cedardeck and cedardeck clear and four deck board profiles.

Western Red Cedar can create a high quality deck, with a natural ability to resist decay and dimensional properties keeping the decking straight and stable, perfect for home decking or industrial decking use. We are confident you will not find a better softwood decking material than Western Red Cedar timber.

Brochure PDF

Cedardeck Clear - Also known as Architect Clear, The ultimate in durability and appearance. Its fine grained heartwood appearance will meet the needs of the most demanding clients. All aspects of manufacturing and quality control are performed to the highest standards of the lumber industry. Architect Clear decking should be specified when only the best will suffice. This product is manufactured exclusively for Silva Timber in the UK.

Cedardeck - Also known as Architect Knotty, Cedardeck is durable, well manufactured Western Red Cedar decking that comes ready to use. This sound and tight-knotted decking limits both the size and quality of characteristics to meet the highest buyer expectations. The smooth, skip-free dressing over the entire face makes it the ideal deck surface. The top choice where the natural beauty and lasting charm of a knotty deck are desired.

Species Information

Wood type



FSC Certification: Clear Vertical Grain, Select Tight Knot
PEFC Certification: No. 2 Clear, No. 3 Clear


A tree of the northern Rocky Mountains and Pacific North-west; its full range extends from Alaska southwards to California, and eastwards along many of the interior ranges of British Columbia, northern Washington, Idaho and Montana to the western slope of the continental divide.

The Tree

The largest of the so-called cedars, it grows to a height of 45m to 75m with a diameter of 1m to 2.5m.

The Timber

The sapwood is narrow and white in colour, and the heartwood is reddish-brown. When freshly felled, the heartwood often displays a marked variation in colour; that from the centre of the log may be a dark chocolate-brown changing to salmon pink nearer the sapwood, or the wood may be variegated with alternate dark and light zones. After conventional high temperature kiln drying, the wood assumes a uniform reddish-brown tone, but after long exposure to weather the colour is lost, and the wood becomes silver-grey. This weathered appearance is sometimes purposely sought by architects, but a further peculiarity of the wood is its ability to take and hold stain of the finest tint without discolouration. The wood is non-resinous, straight-grained, somewhat coarse- textured and exhibits a fairly prominent growth-ring figure It is soft, rather brittle, aromatic, especially when wet and light in weight, about 390 kg/m³ when dried.


Thin sizes dry readily with little degrade, but the timber generally tends to hold its moisture at the centre and care is needed with thick stock to avoid internal honey-combing and collapse. The timber holds its position well after drying with practically no tendency to warp and check. while movement due to shrinking and swelling in changing atmospheres is small.


Its light weight and soft timber contributes to low strength properties and compared with European redwood (Pinus sylvestris) it is some 20 to 30 per cent inferior in bending strength, and about 1 5 per cent less stiff. It is also much less resistant to splitting and indentation on side grain than redwood.

Working Qualities

Good - The timber works easily with both hand and machine tools, but its relatively brittle nature, which can cause splintering during some operations, and its soft character, which can lead to chip-bruising, usually means that care is needed in order to obtain the best results during mortising, planing and moulding. A good finish can be obtained, but cutters must be kept sharpened.




Extremely difficult
Difficult (Sapwood)

Moisture Movement




Density (mean, Kg/m³)

390 ( )




Readily available at timber merchant



Chemical Properties

Fine dust may be irritant. An acidic timber which may corrode metals under damp comditions and cause iron staining.


Cladding, Decking, Joinery - Exterior


Reddish brown (Ages to silver grey if left unprotected)


Source: http://www.trada.co.uk

FSC & PEFC Certification

Western Red Cedar Cedardeck Clear - FSC Certified.
Western Red Cedar Cedardeck - PEFC Certified

Forest Stewardship Council (FSC) Accreditation

FSC is a world-wide, independent, non-profit, non-governmental organisation representing environmental and social groups and the timber and forestry industry. It aims to generate certification of forestry activity that incorporates clear guidelines and standards covering social, environmental and economic aspects of forest management.

Established in 1993 as a response to concerns over global deforestation, FSC is widely regarded as one of the most important initiatives of the last decade to promote responsible forest management worldwide

The FSC label provides a credible link between responsible production and consumption of forest products, enabling consumers and businesses to make purchasing decisions that benefit people and the environment as well as providing ongoing business value.

Chain of Custody (CoC)

The FSC Chain of Custody (CoC) certification system provides an audit trail from forest to final use. The rigour of the system is ensured by regular independent inspection at all stages in the supply chain.

FSC chain of custody (CoC) tracks FSC certified material through the production process - from the forest to the consumer, including all successive stages of processing, transformation, manufacturing and distribution.

Only FSC CoC certified operations are allowed to label products with the FSC trademarks. The FSC label thus provides the link between responsible production and consumption and thereby enables the consumer to make socially and environmentally responsible purchasing decisions.

Silva Timber Products meets the requirements for FSC Chain of Custody Standard FSC - STD - 40 - 004 (2004) within the BM TRADA Certification Limited Scheme for TRADA - Trak chain of custody certification

Certificate number:- TT-COC-002296


Schemes Programme for the Endorsement of Forest  Certification  (PEFC)

The PEFC Council is an independent, non-profit, non-governmental organisation founded in 1999 which promotes sustainably managed forests through independent third party certification. The PEFC provides an assurance mechanism to purchasers of wood and paper products that they are promoting the sustainable management of forests.

PEFC works throughout the entire forest supply chain to promote good practice in the forest and to ensure that timber and non-timber forest products are produced with respect for the highest ecological, social and ethical standards. Thanks to its  eco-label, customers and consumers are able to identify products from sustainably managed forests.

Silva Timber meets the requirements for PEFC Chain of Custody within the BM TRADA Certification Limited Scheme for TRADA - Trak chain of custody certification.

Certificate number: BMT-PEFC-0319

Technical Data Sheet

Not available.

Finishing and maintenance

It is recommended that a finish is applied to all surfaces, including ends, before installation. The type of coating wil be determined by the final finish and appearance desired.

Finish protects the wood from moisture absorption and UV degradation. It helps prevent staining caused by mildew and extractives and will increase the service life of the timber.

Consider one of our stunning finishes from the Sansin exteriors range. Click here to view the Sansin brochure.

A wide range of coating and stains are available to view here.

Silva Timber also offer a pre-finishing service, reducing installation time and on-site preparation.

Feel free to discuss your finish requirements with our customer support team on 0151 495 3111 or 01895 271 300. Alternatively email enquiries@silvatimber.co.uk.

Case Studies
Western Red Cedar Decking Budenberg Project Silva Timber RHS Show Tatton Park Outdoor Kitchen Western Red Cedar Decking Brompton Lakes
Western Red Cedar Rockridge Shacks Western Red Cedar Decking donated to Willowbrook Hospice Western Red Cedar Decking Bristol Marina
NBS Specification Information



Call for more information - 0151 495 3111