Douglas Fir
Pseudotsuga menziesii • Softwood / Engineered (Plywood)
Grain Pattern
Heavy rotary-peeled cathedral grain with prominent earlywood and latewood contrast. Uneven and coarse texture characteristic of construction-grade plywood.
Color Description
Heartwood is a reddish-brown to orange-tan; sapwood is yellowish-white. Shows significant darkening/pinking upon exposure to UV. High contrast between light springwood and dark summerwood.
Hardness Rating
660 lbf (Soft)
Durability Rating
Moderately Durable; heartwood is resistant to decay but susceptible to insect attack. Common and widespread in construction.
Common Uses
Structural plywood, subflooring, sheathing, heavy construction framing, and glue-laminated beams.
Geographic Origin
Western North America (Pacific Northwest)
Market Value & Sustainability
Estimated Market Value
$1.50 - $2.50 per square foot (based on 3/4 inch ACX or CDX grade plywood)
Wood Age Estimate
Approximately 10-30 years based on oxidation of the resins and visible wear/scuffing on the surface.
Sustainability Status
Not listed on CITES or IUCN Red List. FSC certified versions are widely available and harvested from managed forests.
Workability
Generally good with power tools, though the alternating hard and soft grain can cause splintering (tear-out) during crosscutting. Glue and screws hold well.
Notable Features
Distinctive resinous scent when cut. Known for the highest strength-to-weight ratio of any softwood. Can cause skin irritation and respiratory issues in some individuals.
Finish Recommendations
Primarily used unfinished in structural settings. If finished, a sealer or wood conditioner is recommended before staining to prevent blotching due to uneven density.
Identification Confidence
High; the wide, rotary-peeled grain patterns and the orange-red hue are diagnostic for construction-grade Douglas Fir plywood.