Western larch (Larix occidentalis) is a softwood with a Janka hardness of about 830 lbf, harder than Douglas-fir and soft maple. In British Columbia it is graded and sold together with Douglas-fir as DF/L, so construction lumber from a BC Interior yard may be larch. It works well for tabletops and shop furniture, needs freshly sharpened tools, and its resin pockets need a dewaxed shellac spot coat before finishing [1][2][3].
A conifer that drops its needles
Western larch is the only common deciduous conifer in the BC Interior. It grows needles and cones and then sheds its needles for the winter [1].
Hardness
Western larch has a Janka hardness of about 830 lbf [2].
For comparison, soft maple is about 700 lbf, Douglas-fir about 660 lbf, yellow cedar about 580 lbf and black cherry about 950 lbf [2][4].
Western red cedar has a Janka hardness of about 350 lbf [5].
At about 830 lbf, western larch is closer in hardness to black cherry than to western red cedar [2][4][5].
Western larch has the dent resistance for daily-use tabletops, structural members such as legs and stretchers, and shop furniture [2].
Working larch
A dull iron chatters on western larch and tears the latewood bands. Chisels need to be freshly honed for clean mortise walls [2].
Western larch is high in silica and blunts cutting edges. Sharpen before starting work on it [2].
DF/L: larch sold as Douglas-fir
Douglas-fir and western larch are graded and sold together under the DF/L designation in Canadian construction lumber. The grade tag does not say which species a board is [1].
Douglas-fir and western larch are different species. The grouping matters little for framing, but for furniture the two species differ in surface character, resin behavior and finish response [1].
To tell western larch from Douglas-fir on a freshly planed surface: larch is golden yellow-orange and fairly even in tone, while Douglas-fir is reddish-tan with more pronounced, high-contrast latewood bands [1].
Western larch is heavier than Douglas-fir for the same volume, and handling several boards is a quick way to sort them [1].
Resin pockets are more common in Douglas-fir than in western larch. A clean, heavy board from DF/L stock is likely larch [1].
For furniture work, ask the yard to separate larch from DF/L stock. A good BC Interior supplier can do it [1][6].
Finishing larch
Western larch has no thujaplicin bloom, the extractive problem that affects yellow cedar finishes [3].
Standard waterborne, oil-based and hardwax oil finishes work on properly prepared western larch [3].
Pitch pockets, openings filled with free resin, occur in western larch as they do in pines, spruces and Douglas-fir [7].
Resin pockets in western larch show under raking light as darker, translucent and sometimes slightly tacky spots [3].
Seal each resin pocket in western larch with a spot coat of dewaxed shellac and let it dry fully before applying the finish [3].
Western larch stains evenly and does not need a pre-stain conditioner [3].
Under a clear finish, western larch is golden to amber. An oil-based finish deepens and warms the tone [3].
Where larch comes from
Western larch grows in the Okanagan, Shuswap and Kootenay regions of British Columbia, so in the BC Interior it is a local species [6].
Western larch can be sourced in the BC Interior as DF/L construction lumber from building supply yards, from Kelowna specialty dealers on request, and from local sawmills [6].
Sources
- Hewn heuristic entry HEU-R963, western larch identification and DF/L, 2026-03-16, Hewn internal, unreviewed; the DF/L grouping and the deciduous habit were checked against the NLGA Standard Grading Rules for Canadian Lumber, canadawood.org, naturallywood.com and wood-database.com "Western Larch" (as listed in Hewn's notes, Scout Block 93, R963).
- wood-database.com "Western Larch", precisebits.com "Relative Wood Hardness Table", prosandflooring.com "Hardness Rating: Western Larch", against Hewn heuristic entry HEU-R964 (as listed in Hewn's notes, Scout Block 93, R964).
- Hewn heuristic entry HEU-R966, western larch finishing, 2026-03-16, Hewn internal, unreviewed; the resin pocket protocol and even stain response were checked against wood-database.com "Western Larch" (as listed in Hewn's notes, Scout Block 93, R966).
- Wood Database Janka values, against Hewn heuristic entry HEU-R979, BC Interior species hardness table (as listed in Hewn's notes, R979).
- Hewn deep-research note DR#40, Douglas Fir and BC Softwoods, 2026-03-13, Hewn internal, unreviewed. No outside source is named for the figure.
- Hewn heuristic entry HEU-R967, western larch supply in the BC Interior, 2026-03-16, Hewn internal, unreviewed; the species range was checked against naturallywood.com "Western Larch" and the NLGA grading rules (as listed in Hewn's notes, Scout Block 93, R967).
- USDA Forest Products Laboratory, Wood Handbook, Chapter 5, Mechanical Properties of Wood, pitch pockets.