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For Architects & Designers
Western Red Cedar

Botanical Name: Thuja plicata

Western Red Cedar is one of North America's great renewable resources. 

Slow grown and naturally durable, Cedar has one of the longest life spans of any North American softwood.  It can produce long lengths of clear timber with true straight grain, it is free from pitch and has natural resistance to decay.  Its low density gives an excellent insulation value superior to most species. 

Lightweight, easy to work with, easy to finish, easy to stain, possessing outstaning dimensional stability, Western Red Cedar is the perfect material for exterior cladding applications.

Western Red Cedar is PEFC certified.

Teknos Coatings

Teknos coatings are designed to keep your cladding looking its best year after year.  They carefully select the best and most appropriate products from their extensive group portfolio to ensure their coatings offer optimum performance for the UK market.
Teknos’ high quality products have been developed to help timber withstand the harshest climates and protect it from UV-light, rain, humidity and extreme temperatures.  For more information on Teknos products, please click here.

Sansin Coatings from Dresser Mouldings

Dresser Mouldings is proud to offer a premier wood finish from Sansin – a company that also believe in making products that are designed to perform and impress.  For more than 30 years, Sansin has pioneered the use of water-borne, environmentally-friendly wood protection finishes and treatments to optimize performance and durability, as well as enhance the natural beauty of wood.  Offered in a range of stunning colours, Sansin finishes give you the beauty and protection you’ve been looking for.  For further information about Sansin factory finishes for your project, please contact us.

Product information

Technical Information


Western Red Cedar is one of the world’s most durable species.  With natural resistance to moisture, decay and insect damage, Cedar remains the premier choice for timber cladding.  Fibres in the timber contain natural preservatives that are toxic to decay-causing fungi.  Cedars durability is class 2, which is classed as ‘durable’.  Cedar will weather to a silver grey colour if left untreated over a period of time, but if this is not your preference Cedar is very receptive to most stains.

Dimensional Stability

Cedar is hygroscopic and will absorb or discharge moisture to attain equilibrium with the surrounding atmosphere, however, it has a very low shrinkage factor and is superior to all coniferous species in its resistance to warping, twisting and checking.

Thermal Conductivity / Acoustic Properties

Wood is an excellent thermal insulator.  This is an important characteristic since good thermal insulators keep buildings cool in the summer and help retain heat in the winter.  An important acoustic property of timber us its ability to dampen vibrations.


Cedar is one of the lightest commercial softwoods available and if Kiln Dried has a density as low as 330-390kg per m3.  Cedars low density enhances its insulation value and makes it an east wood to handle, distribute and work with.


Western Red Cedar produces long lightweight lengths of timber with a fine straight grain making this specie easy to cut, saw, machine and fix.  Again Cedar is one of the best species available for accepting paints, stains, oils and various treatments.  Cedar takes most fasteners without splitting and is easily nailed.