Sawn timber is extended using finger joints when there is a need for pieces of timber that are longer than normal or cer... Sawn timber is extended using finger joints when there is a need for pieces of timber that are longer than normal or certain properties are required of the timber. By using finger joints, it is possible to produce, for example, pieces of sawn timber that are made completely of heartwood, completely knotless and very straight. …

In Finland, Impregnated timber is pine timber that has been impregnated with an impregnation agent containing... In Finland, Impregnated timber is pine timber that has been impregnated with an impregnation agent containing copper compounds (C impregnation) into classes A and AB. In terms of colours, in addition to the traditional green there is also brown, which is made by adding a coloured pigment to the impregnation agent. Classification of Impregnated timber: impregnation class A, …

Thermally modified timber is manufactured from pine, spruce or deciduous trees using the thermal modification proce... Thermally modified timber is manufactured from pine, spruce or deciduous trees using the thermal modification process. The process is based on the use of high temperature (about 200 C) and steam, so no chemicals are used in the process. Thermally modified timber has better biological durability and lower moisture content than sawn timber that has not been thermally …