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Western Red Cedar

Thuja plicata
Also known as: Pacific Red Cedar, Giant Arborvitae, Shinglewood
DomesticBeginner-FriendlyAffordableFSC Available
Janka Hardness
350 lbf
1.6 kN
Density
370 kg/m³
1.5 lbs/bf
Grain
Straight
Texture: Coarse
Figure
Straight grain with subtle growth ring figure; occasional burl and bird's eye
Drying
Easy
Movement: Small
Origin
Pacific Northwest, western North America
Cupressaceae
Plain-Language Guide

Western Red Cedar is the default choice for anything outdoors in North America: decking, siding, fencing, garden furniture. Its natural rot and insect resistance is exceptional for a wood this soft and affordable. The softness is the trade-off — it dents and dings in service, so it's not ideal for tabletops or high-traffic surfaces. Two practical notes: always use stainless or hot-dipped galvanized fasteners (iron reacts with tannins and leaves black stains), and use water-based finishes (the oils can inhibit oil-based products). The dust is a significant allergen — more so than most species.

Common Mistakes
  • Using steel fasteners outdoors — tannins react with iron and leave permanent black staining
  • Applying oil-based finishes without testing — the natural oils can prevent proper curing
  • Skipping a respirator — plicatic acid in the dust is a genuine sensitizer
Color & Appearance
Heartwood
Sapwood

Heartwood ranges from pinkish-brown to reddish-brown to deep chocolate, sometimes with purple tones. Sapwood is nearly white. Color fades to silver-grey on exposure without finish; oils and stains restore the color.

Workability
Hand Tools
Excellent
Machine Tools
Excellent
Gluing
Moderate
Finishing
Moderate
Turning
Not typically used
Carving
Suitable

Extremely easy to work — cuts like butter with any sharp tool. Very soft, so dents easily and sharp tools prevent tear-out. Natural tannins can react with iron and cause black staining: use stainless or galvanized fasteners outdoors. The oils that give it rot resistance can inhibit oil-based finishes; water-based products work better.

Global Availability
RegionAvailability
North AmericaWidely available
EuropeRegional / select dealers
South AmericaRare / not commonly imported
Australia/NZRegional / select dealers
AsiaRegional / select dealers
AfricaRare / not commonly imported
Health & Safety
Allergen Risk
High
CITES Status
None
Notes
One of the more significant wood allergens. Plicatic acid in the dust causes asthma-like symptoms in sensitized individuals. Use a respirator; sensitization can develop with repeated exposure. None significant for woodworking
Common Uses
Outdoor furniture Siding and shingles Fencing Sauna interiors Boat planking Closet and chest liners Raised garden beds
Sustainability: Second-growth abundant. Old-growth is increasingly limited and commands a premium. FSC-certified easily sourced.