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Cascadia Western Red Cedar Board on Board Cladding

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Cascadia Western Red Cedar Boards

The versatility of our board-on-board (board and batten) style cladding means you can create a wide range of vertical designs with different shadow line effects, as well as fascias, barge boards, door and window trims, corner trims, fences, horizontal slatted screens and more.

At a glance

  • Fast and easy to install
  • Rustic, characterful appearance
  • Kiln Dried Western Red Cedar
  • Various profile widths available to create desired look

Please ensure when ordering that you make an allowance for wastage. We recommend adding an additional 10-15% over and above your initial requirements.

Various profile widths available to create desired look

The warm Cascadia Western Red Cedar is ideal for a contemporary finish, and whether you go for an inner layer of boards spaced apart with an outer layer of boards, or use battens for a double-layer style for your cladding, you’ll create bold shadow lines that make any building look taller.

We Source the Finest Raw Materials

We import our Cascadia Western Red Cedar boards from the renowned sawmill Terminal Forest Products in British Columbia, Canada. It’s made from only the highest quality wood fibre, so you will always get the best tight knot grade cedar, sustainably sourced from well managed forests with full PEFC chain of custody certification.

Kiln Dried for Stability

In being kiln dried to a moisture content of 12-15% (+/-2%), Cascadia boards are dried uniformly, making them more dimensionally stable and allowing you to coat them immediately. Boards can also be installed with minimal site acclimatisation. Find out more about the benefits of kiln dried timber.

Create Impressive Interiors

Why stop at external cladding when Cascadia Western Red Cedar boards look stunning used indoors too. The natural colour and texture of the wood brings a warm vibe to any room, and you can use the boards as wall panelling, dividers or even a ceiling covering.

A Full Range of Cladding Accessories

In addition to the cladding boards, Silva also provides battens, Tyvek® breather membrane, stainless steel nails, door / window trim, soffits, fascia, barge boards, corner sections and a wide range of coatings and cleaning products – everything you need to complete the job.

Trust Us to Meet Your Western Red Cedar Needs

Our links with the sawmills of Western Canada mean we can supply larger volumes of Western Red Cedar for manufacturers or resellers. Get in touch to discuss your needs.

Read more

  19 x 89mm 19 x 140mm 19 x 184mm 19 x 235mm 19 x 286mm
Profile code ST0503 ST0505 ST0506 ST0507 ST0508
Minimum gap between boards 13mm 13mm 18mm 18mm 18mm
Minimum batten overlap 13mm 13mm 18mm 18mm 18mm
Actual coverage 102mm 153mm 202mm 253mm 304mm
Lineal metres per m2 9.80 6.54 4.95 3.95 3.29

Finishing & Protection

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

Why Pre-finish?

  • Enhances the natural beauty of wood
  • Ensures a consistent finish
  • Applied in factory conditions
  • Long lasting protection against weathering
  • Simple maintenance routine
  • Reduces onsite labour costs

Sansin Enviro Stains

Easy to apply and maintain, Sansin Enviro-stains deliver outstanding performance. Sansin's range of wood protection products are available in 80 colour tones

What is weathering?

There is a risk involved when leaving wood exposed to the elements. During the weathering process wood can appear unsightly as the material can blacken due to moisture getting into the fibres and pulling out tannins and extractives. Finish protects the wood from moisture absorption and UV degradation.

What to expect from timber products

When working with timber it should be expected that although ‘on-grade’, occasional boards may have minor imperfections that will require ‘working’ if you wish to eliminate. Examples include raised grain, small splits, minor handling marks, sticker marks etc – all of which can easily be remedied by trimming, gluing or sanding. In most cases imperfections can be removed with very little effort, and the small amount of off cuts generated as a result will be absorbed in the normal cutting and selection allowance.


See below technical details for individual profile widths

  19 x 89mm 19 x 140mm 19 x 184mm 19 x 235mm 19 x 286mm
Profile code ST0503 ST0505 ST0506 ST0507 ST0508
Gap between boards 13mm 13mm 18mm 18mm 18mm
Batten overlap 13mm 13mm 18mm 18mm 18mm
Actual coverage 102mm 153mm 202mm 253mm 304mm
Lineal metres per m2 9.80 6.54 4.95 3.95 3.29


Western Red Cedar boards are available in kiln dried ‘select tight knot’ grade.  Boards are planed on one face and two edges and sawn on one face.  Silva recommends installing board-and-batten cladding with the sawn face exposed.

Select Tight Knot is the highest standard of knotty cladding and trim available. This grade offers a distinctive, high quality knotty appearance.  It has limited imperfections and restricts knots to sound and tight. 

The grade is characterised by knots, grain patterns and other natural features combined with a palette of warm, mellow tones ranging from light amber to deep honey brown.  Sound tight knots are live knots that are grown into the wood and are less likely to fall out than dead knots.

Silva sources its select tight knot grade Western Red Cedar boards from one of North America’s leading primary sawmills, with a reputation throughout the industry for producing superior quality Western Red Cedar products.

The raw material is carefully selected to ensure consistency in quality and performance.  By starting with a reliable and consistent fibre supply, Silva is able to offer knotty grade Western Red Cedar boards that meet exacting standards from order to order.

Silva Select Tight Knot boards are graded on all sides to ensure knots are sound and tight. It is supplied kiln dried which ensures consistent material which can be installed without the need for acclimatisation on site and can be prefinished without delay. 


This product carries 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

Western Red Cedar is the ultimate green building material. It is legally, responsibly and sustainably harvested in the publicly managed forests of British Columbia, Canada. Less than 1% of standing timber is harvested each year.

For each tree harvested, three are replanted to ensure the forests will exist in perpetuity. Western Red Cedar has a low impact on the environment throughout its life cycle. It requires significantly less energy to produce than man-made alternatives and is bio-degradable.


  • FSC
  • PEFC
  • Trada member
  • Responsible purchaser
  • Cedar Shake & Shingle Bureau
  • Secured by