Larch wood
Frequently asked questions
Can Larch wood be laser cut?
Yes: Larch wood can be laser cut. Adequate extraction/ventilation is required.
Can Larch wood be CNC machined?
Yes: Larch wood can be CNC machined.
Is Larch wood food safe?
Yes, Larch wood is food safe even in its raw state.
Physical properties
| Density | 500.0–600.0 kg/m³ |
|---|---|
| Janka hardness | 4000.0 N |
| Moisture absorption | Medium |
Laser processing
Combustion fumes contain resins and extracts typical of larch, with a pungent, slightly acid odour. Not toxic but very persistent. Carbon-based residues are moderate. Forced extraction and cleaning every 30–40 minutes of processing.
CO₂: Larch is harder and denser than Douglas fir: requires 30–40% more power to cut at the same thickness. The high resin content (colourless, not very oily) produces a clean, slightly dark edge. Larch engraves well, but the hardness difference between early and late wood is even more pronounced than in fir; expect very distinct marks on winter rings.
Diode: Diode cutting limited to ≤2mm thickness on larch, with 10W+ laser at very low speed. The natural colour of larch (reddish/orange) does not absorb blue diode light as well as darker woods, so efficiency drops by 15–20%.
Fiber: Not applicable.
CNC / milling processing
Very good machinability on CNC. Excellent for structural components and outdoor joinery. Bits remain sharp longer than with softer softwoods. The hardness of larch allows very clean finishing passes. Suitable for helical upcut bits.
Post-processing
Sanding: Larch grain is very pronounced (strong early wood/late wood). Carefully graduated sanding (100 → 180 → 240) for a uniform surface. In rustic pieces, natural unevenness can be appreciated as a decorative feature.
Primer: Strongly recommended. Larch's natural resins can create serious fisheye problems with water-based paints. A dedicated insulating primer (chemical barrier) or shellac is essential.
Gluing: Good with epoxy and polyurethane adhesives. PVA may give reduced results on very resinous surfaces. Moisture in the processing environment (<12%) is essential to prevent the resin from blooming to the surface and compromising gluing.
Seasoning: Larch seasons very slowly. It is advisable to let it stabilise for at least 3–4 months after purchase before use in precision projects.
Over time: Excellent dimensional stability. Larch is one of the most durable softwoods. Outdoors, it greys beautifully without requiring constant maintenance. Less prone to cracking than the same-section Douglas fir.
Common defects
- Resin bleed in warm environments
- Brownish laser edges in resinous zones
- Frequent knots in lower-grade boards that compromise machinability
Safety
Recommended PPE: mask_p3, eye_protection
Larch dust is moderately irritant. Laser fumes, although natural, contain volatile acids and should not be inhaled in the absence of adequate extraction.
Availability and formats
Commercial formats: sawn boards, beams, tongue-and-groove strips, cladding staves
Related materials
Sources
- Wood Database — European Larch (Larix decidua)
- UNI EN 350 — Durabilità naturale del legno
Information on compatibility, processing parameters and safety is purely indicative. MakerSpecs accepts no liability for damage to persons or property arising from the use of this data. Always check the safety rules and the manufacturer's official manuals before carrying out any processing.