Western Red Cedar
Thuja plicata · Softwood
- Type
- Softwood
- Origin
- Pacific Northwest of North America (British Columbia down through Washington, Oregon, and Northern California).
- Hardness
- 350 lbf (Very Soft)
- Durability
- Durable to Very Durable; excellent natural resistance to decay, rot, and insect attack due to high extractives and thujaplicin content.
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Grain Pattern
Generally straight and even grain with consistent narrow growth rings; flat-sawn displaying typical cathedral patterns around knots; small, sound tight knots visible in this deck grade lumber.
Color & Appearance
Heartwood ranges from light pinkish red to deep reddish brown. Sapwood is yellowish white. It weathers to a silvery-grey patina (visible on the right-hand board) due to UV exposure and tannins leaching.
Hardness (Janka)
350 lbf (Very Soft)
Durability & Decay Resistance
Durable to Very Durable; excellent natural resistance to decay, rot, and insect attack due to high extractives and thujaplicin content.
Value & Sustainability
- Estimated Market Value
- Ranges from $3.50 to $7.00 per board foot depending on grade (clear vs. knotty) and dimensions.
- Wood Age Estimate
- 5 to 10 years; evidenced by the transition from remaining golden-brown sealer on the left toward silver oxidation and surface checking on the right.
- Sustainability Status
- Least Concern (IUCN); widely available with FSC certification; considered a sustainable choice for North American construction.
Common Uses
Outdoor decking, siding (cladding), shingles, fencing, gazebos, garden furniture, and saunas.
Geographic Origin
Pacific Northwest of North America (British Columbia down through Washington, Oregon, and Northern California).
Workability
Very easy to work with hand and machine tools; however, it is prone to denting and scratching due to softness; splits easily when nailed or screwed without pre-drilling near edges.
Finish Recommendations
Penetrating oil-based stains or water-repellent preservatives are best for exterior use; solid color stains or film-forming finishes tend to peel over time due to seasonal movement.
Notable Features
Distinctive aromatic scent; lightweight; contains natural oils that can react with non-stainless fasteners to cause black iron stains; dust can be a respiratory irritant.
