The board – it’s a lumber which has 90° angle on all four sides, used both inside and outside the building.
It is made of coniferous, but, it is believed that the highest quality product made of pine. Pine tree contains high level of resin, which can provide excellent operation and waterproofing capabilities. In addition, this material is less susceptible to such destructive processes as: fungus, mold and decay.
The price of sawn and unsawn board depends on species of wood, quality of processing, presence of knots, cracks, natural humidity etc.