Western Red Cedar — Thuja plicata
Medium-High, based on the straight grain pattern, soft texture, reddish-brown color, and typical use in high-humidity spa environments. confidence

Western Red Cedar

Thuja plicata · Softwood

Type
Softwood
Origin
Pacific Northwest of North America, extending from Northern California to Alaska.
Hardness
350 lbf (Very Soft)
Durability
Very Durable, with exceptional natural resistance to decay, rot, and weathering due to natural extractives (thujaplicins).

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Grain Pattern

Straight, flat-sawn and vertical-sawn with tight, even growth rings visible on the surfaces.

Color & Appearance

Rich reddish-brown to pinkish-brown heartwood with lighter yellowish-white sapwood, heavily modified and darkened by a brownish stain or finish, exhibiting a moderate natural luster.

Hardness (Janka)

350 lbf (Very Soft)

Durability & Decay Resistance

Very Durable, with exceptional natural resistance to decay, rot, and weathering due to natural extractives (thujaplicins).

Value & Sustainability

Estimated Market Value
3.50 to 7.00 USD per board foot depending on grade and dimensions.
Wood Age Estimate
Estimated to be 10 to 30 years old, based on surface wear patterns, oxidation, and the application of an older exterior/spa finish.
Sustainability Status
Not CITES listed, generally of least concern on the IUCN Red List, widely available with strong sustainable forestry practices and certified plantations in North America.

Common Uses

Outdoor furniture, decking, siding, shingles, greenhouse construction, saunas, and boat building.

Geographic Origin

Pacific Northwest of North America, extending from Northern California to Alaska.

Workability

Very easy to work with both hand and machine tools due to its softness; glues and finishes exceptionally well, though its softness makes it prone to denting and requires sharp tools to prevent tearing.

Finish Recommendations

Penetrating oils, exterior varnishes, or semi-transparent stains work best in humid environments like spas; ensure the surface is clean and dry before reapplication.

Notable Features

Contains natural aromatic oils (thujaplicins) that impart a distinct cedar scent and provide natural insect and rot resistance; very lightweight and dimensionally stable.

Notes

In spa 2

Learn more about Western Red Cedar in the Wood Encyclopedia
Identified August 4, 2026