Trunk has a long sound-knotted part.

Most planks and boards are also sound-knotted.

The colour of sound knots does not differ from the surrounding timber.

The surface of sound-knotted sawn spruce is uniformly pale.

The dry-knotted section of the trunk is short and the dry knots are small.

Planks and boards have few arris knots, they are small and easy to plane.

The wood is straight-grained.

The wood grain does not rise up with sanding, planing, cutting or painting.

The wood has few resin pockets, and their length is rarely more than 40 mm.

Glueing and surface treatment properties are good.

The proportion of heartwood is great. The surface wood only lets through a little water.

Moisture penetrates the wood slowly; the wood is durable on facades. Correctly sawn, it will not warp easily.

The trunk usually has a long knotless part.

Simple surface and side boards with very few knots can be made.

The trunk’s dry-knotted part also often contains sound knots.

The inner faces of timber from the central part of the trunk are very often sound-knotted

The growth angle of a branch in relation to the core of the trunk is right-angled. The density of wood in the branch is low.

The wood is easy to plane.

Resin occurs evenly throughout the wood.

Planing smooths out the resin into a silky texture on the surface of the wood. The resin protects the wood in both humid and hot climates.

The density of the wood at the base of the trunk is 1000 kg/m³ higher than at the top. In the same way, the density of the surface wood at the base is higher than at its heartwood.

Boards and side boards from the base of trunks are strong.

The heartwood contains pinosylvins, which do not allow water to penetrate.

The heartwood is naturally resistant to decay and can also withstand attacks by insects.

The sapwood is very porous to water.

The sapwood can be easily impregnated and so is very suitable for outdoor use.