Norway Spruce
Picea abies
Also known as European spruce, whitewood, European whitewood · Botanical Picea abies
Revision history
- — Data re-verified in site-wide audit (formulas, sources, durability classes)
- — Working properties and comparable-species data cross-checked against listed sources
About Norway Spruce
Norway Spruce (Picea abies) is a soft timber that works easily but bruises and dents in service, with a Janka hardness of 380 lbf (1,690 N) and a density of about 0.43 g/cm³. It grows in Europe.
Tangential movement of 8.2% against 3.9% radial puts the T/R ratio at 2.10. That is the ratio to watch: it predicts cupping in wide flatsawn boards better than either figure alone. Its fibre saturation point is near 30%. Below it, movement is the governing constraint on this species: 8.2% tangential against 3.9% radial, a T/R ratio of 2.10. Flatsawn boards will cup; quartersawn stock is worth the premium here. — wide boards need real expansion room, not a token gap.
At 430 kg/m³ a cubic metre of Norway Spruce weighs about 430 kg air-dry — that figure, the 8.2% tangential and 3.9% radial movement and the 380 lbf hardness are the three inputs the calculators below actually consume. Select Norway Spruce in any of them to get species-specific results for weight, moisture, shrinkage and hardness.
Working properties
How Norway Spruce behaves at the bench and on the machine, drawn from European timber references and international wood-technology data.
Durability & use classification
Norway Spruce is rated slightly durable (EN 350 Class 4), and unlike pine it is difficult to treat — its low permeability resists preservative penetration. That combination is the crux: spruce is an interior and protected-construction timber, and where pine can be treated into exterior service, spruce largely cannot. Specify it accordingly, or use a modified version.
Typical applications & suitability
Indoor — Europe's structural workhorse, chosen for strength-to-weight, availability and price rather than durability. Its acoustic reputation is separate and formidable — spruce is the classic soundboard timber.
Documented end-uses: construction framing and carcassing, glulam and engineered wood products, joinery and interior finishing, panelling, furniture, musical instrument soundboards, packaging, and pulp.
Comparable species
Species closest to Norway Spruce by density, hardness, stiffness and bending strength, computed directly from the Vriksai species dataset rather than hand-picked.
Trade alternatives. Its closest counterparts are Scots Pine (treatable, so the better exterior choice) and SPF, which includes spruces. For exterior use, thermally modified ThermoWood Spruce is the direct upgrade.
Alternatives to Norway Spruce
Norway Spruce measures 380 lbf Janka at 0.43 g/cm³, EN 350 durability Class 4, movement rated Moderate. At 0.43 g/cm³ Norway Spruce is chosen for weight. Substitutes are ranked to keep that advantage rather than trade it away for hardness. Read the numbers against the Janka scale and EN 350 durability classes.
For anywhere the lightness is costing you surface durability — shelf edges, drawer fronts, table tops that get used.
Lighter still — relevant for panels, cores and anywhere handling weight or transport cost dominates.
Light timbers can still cup badly. These are the more dimensionally settled options at similar weight. Size the gaps with the shrinkage predictor and EMC calculator.
If Norway Spruce is unavailable and the specification cannot change, these are the nearest substitutes across hardness, density, movement, stiffness, bending strength and durability class together — not on any single property. Lower distance means a closer match.
Norway Spruce is EN 350 Class 4, so untreated exterior service is not advisable. These reach Class 1–2 at comparable hardness.
Computed from measured properties only — hardness, density, movement, stiffness, bending strength and EN 350 class. Price, availability and appearance are never inputs. Figures are representative values, not consignment absolutes: two species within a few percent are equivalent until verified on the material. Full method and the rules the engine cannot break.
Substitution is a match on durability class, movement and strength — not on colour or grain. Where two candidates are close, compare them directly before specifying.
Compare Norway Spruce side by side
Lightweight timbers are usually compared on stiffness and surface durability rather than hardness alone. Every pairing shows the measured figures side by side; full matrix in the comparison index.
Calculators relevant to Norway Spruce
Weighted towards span, deflection and coverage — the checks a light timber like Norway Spruce actually needs. Full set in the tool index.
Understand the figures
Janka hardness scale — how the lbf figure is measured · Wood density reference — oven-dry vs air-dry basis · Moisture content — EMC, FSP and service conditions · Strength properties — MOR, MOE and what they govern.
Further reading. What is ThermoWood? · Wood moisture content explained · How to calculate board feet.
Common questions about Norway Spruce
unverified no published source for this figure · FPL USDA FPL Wood Handbook GTR-190 · WD The Wood Database (Eric Meier) · calc derived from the figures above · — no published source found