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Cowichan Gold Western Red Cedar Vertical Grain Boards

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SIZE Linear Metre Square Metre
18 x 184mm £16.15 £85.43
18 x 235mm £21.56 £89.91
18 x 286mm £26.94 £92.67

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(exc VAT) £0.00 (inc VAT) £0.00


Cowichan Gold cladding boards are produced from fine-grained, old-growth Western Red Cedar wood fibre sourced from the coastal regions of British Columbia.

They are manufactured to the highest production standard in the industry by Terminal Forest Products, a family-owned and operated company, which has built an enviable reputation throughout the sawmill industry as a leader in quality and consistency.

Terminal's most exclusive brand, Cowichan Gold, is almost entirely knot free, all heartwood and all vertical grain, making it the highest quality Western Red Cedar cladding and trim product available anywhere.

Cowichan Gold boards are ideal for board-on-board (board and batten) style cladding, creating 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

  • Produced exclusively from old growth vertical grain wood fibre
  • Almost entirely knot free
  • Naturally durable species
  • Kiln dried for optimum dimensional stability
  • Grown in the coastal region of British Columbia, Canada

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

100% Vertical Grain, Virtually Knot Free Cedar

Old growth Western Red Cedar from the British Columbia coastal region

The wood fibre used to produce Cowichan Gold Western Red Cedar cladding is of exceptional quality. The raw material comes from old growth logs harvested in the coastal region of British Columbia, Canada.

Its rich colour, tight growth rings, and the fact that it is all vertical grain combine to give it a truly stunning and unique natural appearance.

Why is vertical grain Western Red Cedar so special?

For centuries builders have recognised that vertical grain timber has superior properties to flat grain, particularly when it is being used in severe exposures. In New England for example, there are many examples of homes, barns and churches built from vertical grain Western Red Cedar that are over 100 years old and still going strong.

Better resistance to UV degradation

The annual growth rings of a tree consist of early spring growth, which is softer and more porous, and late summer growth which is denser, harder and darker in colour. This is known as ‘early wood’ and ‘latewood’. Since ‘early wood’ is softer, it will degrade faster because of exposure to the sun’s ultraviolet (UV) rays, which will over time destroy the cellular structure of the wood. With ‘vertical grain’ Western Red Cedar there is minimal exposure of the softer early wood, so it will put up much better resistance to UV rays and therefore last longer.

More dimensionally stable

With flat grain wood, the growth rings run roughly parallel with the face of the board, so when they shrink, boards have more of a tendency to cup. Vertical grain boards tend to shrink across the thickness so they remain flat with virtually no movement, meaning very low surface cracking and checking.

Better finish retention

Wood scientists have proved that vertical grain wood has better finish absorption and retention qualities than flat grain wood. This means that finishes last longer so won’t need re-applying as frequently, and thus maintenance costs will be reduced. Also, the absorption rate - and therefore the appearance and performance - of the finish will be more consistent since it is only going into vertical grain wood. As a result, a project will look good for longer.

All heartwood

Cowichan Gold Western Red Cedar is all heartwood which comes from the dense inner part of the tree trunk. Heartwood is more durable than sapwood, which comes from the outer part of the tree nearer the bark.

Kiln dried for optimum dimensional stability

Cowichan Gold cedar is kiln dried at source by experts in the art of drying Western Red Cedar. Controlled drying in state-of-the-art kilns is a far better method of drying wood than air drying, as a far more consistent and accurate moisture level can be achieved. The main advantages of kiln drying are improved dimensional stability, the ability to apply a finish immediately and install with minimal site acclimatisation.

Surface Texture

Cowichan Gold Boards are smooth on one face and have a SAWTEX® textured finish to the rear.

Read more

Size: 18 x 184mm

Coverage*: 189mm*

Linear metres per square metre: 5.29

Size: 18 x 235mm

Coverage*: 240mm*

Linear metres per square metre: 4.17

Size: 18 x 286mm

Coverage*: 291mm*

Linear metres per square metre: 3.44

* assuming 5mm gap between boards

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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 Factory Coat?

  • 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.



Cowichan Gold Clear Vertical Grain Grading Criteria

Official Grade: Clear Heart Vertical Grain

General Notes

  • Graded to BS1186-3 Part 4 Class 1
  • High-quality production - exceeds NLGA grading rules
  • 100% heartwood / 100% vertical grain
  • Clean, consistent virtually knot free appearance
  • Kiln-dried to moisture content of 16-18% (+/- 2%)
  • PEFC Certified

  • Wood Fibre

    Fine grained, old growth wood from forests in coastal regions of British Columbia, Canada. Specially selected to ensure finished product is all heartwood and all vertical grain.


    Permitted - though occasional small knots are allowed within the official industry grading rules*, this product is almost entirely free of knots.

    Sap Wood

    Not Permitted - all heartwood.

    Compression Wood

    Not Permitted - none present.

    Deformation (Warp)

    Permitted - boards with ‘very light’ curvature and twisting, as far as proper installation is ensured. As a guide, a 5mm deviation from true is permitted on a 18 x 89 x 2440mm board. The longer the board, the greater the deviation from true is permitted.


    Permitted - small occasional surface checks permitted.


    Permitted - short splits permitted equal in length to the width of the board. Splits may be present in small percentage of boards.

    Torn or Raised Grain

    Permitted - very light torn or raised grain permitted.

    Machining / Handling Marks

    Permitted - occasional minor marks / blemishes may be present.

    Colour Variation

    Permitted - colour can vary between boards and within boards. Typical colour range: light straw to dark reddish brown.

    This is offered as a general guide to the main characteristics likely to be encountered in any shipment of Cowichan Gold Clear Vertical Grain material. There are many other minor wood characteristics not listed which may occasionally be present but would not detract from the usability of the material.

    *National Lumber Grades Authority (NLGA) Standard Grading Rules for Canadian Lumber – Paragraph 200a.


    This product is PEFC certified.

    PEFC (Programme for the Endorsement of Forest Certification) 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

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