Douglas fir

Overview

The strongest, most useful western softwood: orange-brown heartwood with bold, dark growth rings, and enough strength and stiffness to serve as structure. It is a standard for beams, workbenches and timber frames, and clear vertical-grain stock makes handsome doors and mission-style furniture. Despite the name it is not a true fir (Pseudotsuga), and it is not a pine.

Pros

• Strong and stiff for its weight (Janka 620 lbf); a real structural wood.
• Machines well and accepts glue, stain and finish (Wood Database).
• Wide, long, clear boards are possible; cheap in construction grades.
• Moderately durable heartwood (Wood Database).

Cons

• Sharp, hard latewood and soft earlywood make hand planing prone to chatter and tear-out.
• Moderate blunting effect on cutters (Wood Database).
• Splinters are sharp; the Wood Database notes they can become infected.
• Old-growth or reclaimed clear boards can be much more expensive.

Variants and subspecies

• Flatsawn: cathedral grain with strong ring contrast.
• Vertical grain (quartersawn): straight, tight lines, more stable; the premium cut for doors and furniture.
• Old-growth / reclaimed: very tight rings; often salvaged from beams.
• DF-L / Hem-fir: trade stamps for dimension lumber; compare Western hemlock and True firs.

Working and finishing

Machines and glues fine, but wear and clean cutters because of the moderate blunting effect. The hard latewood bands deflect planes and chisels, so skew the cut and keep irons razor-sharp. Pre-drill, especially near ends. Use a card scraper on vertical-grain faces to avoid raised grain.

Staining and finishing colour

Contrasty rings make stain look streaky; use a conditioner or gel stain, or leave it natural with oil or shellac. It ages from pale tan to a rich reddish orange. Clear finishes with UV blockers slow the darkening.

Sustainability and handling

Not CITES-listed (Wood Database; checked 2026-09-30); IUCN Least Concern as of 2026-09-30. The Wood Database reports that Douglas fir can cause skin irritation, nausea, giddiness and a runny nose, and that splinters are more likely to become infected, although severe reactions are uncommon. Wear a dust mask and gloves when handling rough stock.

Popular projects

Workbenches, shop cabinets, beams and posts, timber-frame furniture, exterior doors and windows (vertical grain), farmhouse tables, and mission-style pieces.

Buying notes

Everywhere as dimension lumber. Surplus Lumber (a California yard) listed a 1x4 D-grade at $0.18 per linear foot and clear shorts at $0.79 per LF for a 1x10; full-length clear 1x10 was about $3 per LF, a useful guide to the range. Furniture-grade vertical-grain boards and old-growth stock cost much more. Pick straight, dry stock; construction framing can be wet and twisted.