How to Identify Sitka Spruce Wood (Picea sitchensis)

Ranges from cream/white to yellow; heartwood can show a subtle pinkish-red hue in some instances. Fine, even texture with a consistently straight grain. End grain: Medium-sized resin canals (larger than other spruces), sparse to numerous, solitary or in tangential groups; earlywood-to-latewood transition gradual with medium color contrast; medium-large tracheid diameter.

Janka hardness 510 lbf (side hardness: the force needed to embed a 0.444-inch steel ball to half its diameter). Specific gravity 0.4 at 12% moisture content, so a cubic foot weighs roughly 25 lb. Weight in the hand is one of the quickest checks: compare a piece of known size against a board you already know.

Sitka Spruce's resin canals are notably larger than those of other spruce species, which is the main endgrain tell versus white/red/black spruce; compared with Eastern White Pine, spruce has a paler cream-to-yellow color versus pine's light-brown-to-reddish heartwood. The Eastern White Pine page has its own details.

No characteristic odor; outstanding stiffness-to-weight ratio; spruce (Picea) reported as a sensitizer causing skin irritation and/or respiratory disorders.

Lumber, boxes/crates, furniture, millwork, aircraft components, musical instrument soundboards, boatbuilding (masts and spars), and wind turbine blades.

Easy to work as long as there are no knots; glues and finishes well, though it can give poor (blotchy) results when stained; spruce reported as a sensitizer causing skin irritation and/or respiratory disorders.

Photograph a freshly cut or sanded face in daylight, not a finished or stained surface, since stain hides color and finish flattens grain. Add a close-up of the end grain: cut a clean end, wet it or sand it to 220, and shoot from straight on; pore pattern and rays are the most reliable marks. Put a ruler in frame. The app suggests the likely species; confirm with the end grain and weight.