Birch timber is sourced from birch species like Betula Pendula (lat. Betula Pendula) and Betula Pubescens (lat. Betula Pubescens). Other Birch species also grow in Central Europe however due to their small size (grow short) they have no economic value.
Most birch density would be approximately about 650 kg/m³ (with moisture level content of 12-15 %). Due to this physical makeup, birch wood maintains the stress-grades of an average to high-density timber species. The birch lumber has an medium hardness, being elastic and viscous and is highly resistant when folded and difficult to split.
Birch is relatively easy treated with hand tools, and quite widely in handcrafting. Machine processing used to plane, mill and more can be used to manufacture bent timber details with often outstanding results.
Birch Timber boasts excellent bending properties while maintaining it’s hard to split integrity. General manipulation practices include glueing, nailing and screwing birch wood details together or with other materials.
Durability and Treatment
Birch lumber needs to be treated with special protection to be used in high humidity environment, and to protect it against potential rots and fungi. Properties of wood Betula Pendula and Betula Pubescens are very similar. Fluffy birch species are of finer fibre, and produce a harder wood.
Unedged or edged Birch lumber
Grade: AA, AB, ABC
KD 8-10%; 12%; 18%; or Fresh Sawn
Thickness: 28mm (unedged) or up to 25mm for edged
Length: up to 3.0m
Rough sawn, S2S or S4S planed