Properties and benefits of nordic spruce and pine
Spruce
BIOLOGICAL PROPERTY OF WOOD | BENEFITS AVAILABLE |
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. |
Pine
BIOLOGICAL PROPERTY OF WOOD | BENEFITS AVAILABLE |
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. |