Cascadia Western Red Cedar Decking

From £47.90 £39.92 per sqm

With its stunning natural appearance and exceptional performance characteristics, Cascadia Western Red Cedar decking is the perfect material for creating impressive outdoor living spaces.

Western Red Cedar is renowned for its durability, dimensional stability, and natural beauty. It is also relatively free of splinters and is a forgiving surface, making it safe for children to play on. It's also worth noting that Cascadia Western Red Cedar decking is entirely natural and contains no toxic preservative chemicals.

Please note: Cascadia 40x140mm Deck Boards are available for pre-order only, with an estimated delivery date into our warehouse of w/c 2nd November 2020.

Wastage Allowance
Please ensure when ordering that you make an allowance for wastage. We recommend adding an additional 10-15% over and above your initial requirements. If using the coverage calculator within the configure and buy, a wastage allowance of 10% is built-in for your convenience.

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Cascadia Western Red Cedar Decking

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A wastage allowance of 10% is built-in for your convenience.

On top of an already impressive list of natural attributes, Cascadia decking also emits an evocative aroma. It exudes a feeling of warmth and luxury that sets it apart from other decking materials.

Cascadia decking forms part of a range of Western Red Cedar cladding, boards, fence, and screen components.

Cascadia is sustainably sourced from well-managed forests and supplied with full PEFC chain of custody certification.

Product Details

Sizes: 40 x 90mm / 40 x 140mm.

Grade: Architect knotty.

Profile: Deck board with eased edges.

Surface texture: Smooth.

Moisture content: Kiln-dried at source to 12-15% (+/- 2%).

Key Properties

Colour: Palette of rich, warm wood tones, which vary from light amber to dark reddish-brown.

Durability: When properly finished and maintained, Western Red Cedar will deliver decades of trouble-free service. It has a decay resistance of durability class 2 (durable) according to the EN 113 standard. 

Stability: Western Red Cedar has excellent dimensional stability because of its low wood density and shrinkage factor. Shrinkage and swelling are minimal, displaying only small movements with changes in humidity.

Density: The wood of Western Red Cedar is light, weighing 330 to 340 kg/m3 when kiln-dried (12-15% moisture content).

Kiln-dried: Cascadia Western Red Cedar is kiln-dried, giving it many advantages. The process improves dimensional stability, permits the immediate application of a coating, and enables installation with minimal site acclimatisation.  

Grading: Cascadia decking is produced exclusively from 'Architect Knotty' grade Western Red Cedar. The grade is characterised by well-interspersed sound tight (live) knots. Read more about grading and quality here.

Sourcing/certification: Western Red Cedar is sourced from the most sustainably managed forests in the world in British Columbia, Canada, and comes with full PEFC certification.

Optional Extras

Coatings: The application of a coating is necessary to protect the wood and optimise its appearance over time. The coating should be applied to all surfaces, including ends, before installation. Choose from our wide range of high-performance wood coating systems.

Factory coating service: Cascadia decking can be supplied factory coated. Having the coating pre-applied on all sides enables it to be installed at any time of year, regardless of the weather or temperature. Please Contact Us for a quotation.

Western Red Cedar posts and railing components: Silva offers a full range of Western Red Cedar components for constructing safe and attractive railing.

Structural timber: For deck substructures, Silva stocks treated C24 grade carcassing in a range of sizes and lengths.

Screws and connectors: Silva stocks a wide range of stainless-steel deck screws, connectors, and hidden fixing systems

Size Linear Metre Square Metre
40 x 90mm £4.55 £3.79 £47.90 £39.92
40 x 140mm £10.27 £8.56 £70.82 £59.02


Size: 40 x 90mm.

Coverage: 95mm (assuming 5mm gap between boards).

Linear metres per square metre: 10.53.

Size: 40 x 140mm.

Coverage: 145mm (assuming 5mm gap between boards).

Linear metres per square metre: 6.89.

Grade & Quality

Cascadia Decking Grade & Quality Description.

Recommended Fasteners

5.0 x 80mm Countersunk Stainless Steel Screws.


Up to 5 weeks.


£45.00 / £95.00 / £145 / POA depending on location.

Free delivery is offered on orders over £2,000 + VAT**.

You can view our detailed delivery charges and services here.

Please note: As with most building supplies, delivery is to the kerbside only.

Scheduled Collection


2-3 weeks.



** Exclusions apply.

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