Handling & safety. Although severe reactions are uncommon, has been reported to cause skin irritation and asthma-like respiratory effects.
Suitable uses
Carcassing and framing, roof timbers, studwork, joists and internal boarding.
Browse projectsProperties
| Latin name | Picea abies |
|---|---|
| Species type | Softwood |
| Origin | Europe. Norway spruce is the Wood Database stand-in for British whitewood. |
| Density | 405 kg/m³ |
| Janka hardness | 1,680 N |
| Modulus of rupture | 63 MPa |
| Elastic modulus | 9.7 GPa |
| Crushing strength | 35.5 MPa |
| Specific gravity | 0.41 |
| Porosity | Non-porous (softwood) |
| Movement class | Very low |
| Tangential shrinkage | 8.2% |
| Radial shrinkage | 3.9% |
| Volumetric shrinkage | 12.9% |
| T/R ratio | 2.1 |
| Durability (EN 350) | Class 4 |
| Relative cost | Budget |
Density and mechanical properties are typical values at around 12% moisture content. Shrinkage figures represent total dimensional change from fibre saturation to oven dry. Individual boards vary.
Spruce / Whitewood — the construction softwood
“Whitewood” is one of those trade words that describes a colour rather than a species, which makes it a useful thing to understand before you order. In Britain, whitewood usually means an imported softwood — pale, light, cheap and destined for carcassing — and the species behind it is most often spruce, which in the UK trade usually means Norway spruce (Picea abies) or sitka spruce. It’s sometimes a mix. If the job depends on the species being exactly one thing, say so and ask for it specifically.
That isn’t a warning, it’s just how the trade’s vocabulary works. What matters more is that whatever’s behind the label does the job well: spruce is the timber the majority of British house frames and roof structures are made from, and it’s there for good reasons.
What it’s like to work
Easy — genuinely one of the most forgiving timbers there is. It saws quickly, takes screws and nails without splitting (within reason), glues and finishes well, and cuts clean as long as you’re not ploughing through a knot. Knots are the main thing to watch: they’re much harder than the wood around them, they can deflect a saw or a plane, and they’re where a structural piece will fail first.
Two practical points. It’s soft, so it dents and marks readily — that matters for anything on show and doesn’t matter at all behind plasterboard. And it doesn’t stain well: closed pore structure means stain goes blotchy and patchy, so use a stain-blocking primer and paint rather than a stain.
Where it earns its place
Carcassing, studwork, roof timbers, floor structures and anything that’s going to be covered up. It’s the right answer where you need cheap, light, straight, strong-for-its-weight timber in quantity and nobody’s going to look at it. Also perfectly good for internal boarding and shelving, where it’s tidy and takes paint well.
Where it costs you
Very little in money. What it costs you is that it’s only as good as its protection: untreated spruce outside won’t last, so any external structural use needs treatment or a design that keeps the weather off it — and if you’re bolting through it, detail the joints so water can’t sit.
Buying note. Ask for the grade and the treatment, and if it’s structural ask which strength class you’re getting — that’s what actually determines whether the timber is fit for the load. For external or damp positions, ask whether the treatment suits the exposure: above ground and in ground contact are different requirements. And if species matters, ask for the species rather than “whitewood”.
Working the timber
TRADA rates European whitewood (spruce) as slightly durable, EN 350 class 4. Janka and strength figures are not stored because they were not in the checked table.
Finishing & gluing
Norway spruce’s closed, even surface can take stain unevenly and look blotchy—particularly where latewood bands are dense—so sealing first (washcoat/gel stain/toner) is the difference between ‘clean’ and ‘patchy’. Keep sanding pressure light: the soft earlywood compresses and burnishes, which can show as shiny patches under clear coat. For instrument-style finishes, very thin, well-levelled coats work better than heavy build on soft spruce fibres.
Spruce bonds very readily with PVA and hide glue, but the best joints come from fresh, lightly textured surfaces—scuff-sand planed faces rather than gluing on a burnished sheen. Because it’s soft, use cauls and moderate clamp pressure to avoid crushing the earlywood and starving the glue line. For exterior or structural bonds, PU or epoxy adds gap-filling and better moisture tolerance.