European Oak

European Oak

Quercus petrea, Quercus robur
Other name: European White Oak

General description

Oak trees are one of the dominant broad-leaved species of temperate Europe. The trees grow 20 – 30 m in height with diameters ranging from 40 – 80 cm.

Wood description

Sapwood is thin, between 1 to 4 cm, and white.The clearly demarcated heartwood is light brown to dark brown. Oak is mostly straight grained with a medium to coarse texture.
Annual rings and rays are clearly visible, oak is a ring porous wood.
European White Oak is a hard and heavy wood with medium strength properties.
Machining is well, nailing and screwing properties are good, but pre-boring is necessary. Gluing must be done with care, the wood is dense, slightly acid an rich in tannins.

Common uses

European White Oak is one of the most important hardwoods and is mainly used for furniture and flooring. It is also used for stairs, windows and doors and also for external paneling.

Physical characteristics
Density (at 12 % moisture content) 702 kg⁄m3
Total longitudinal shrinkage 0.4 %
Total radial shrinkage 4.3 %
Total tangential shrinkage 8.9 %
Equilibrium moisture content  
(20° C⁄ 37 % rel. humidity) 8.9 %
(20° C⁄ 83 % rel. humidity) 17.2 %
Mechanical characteristics
Modulus of elasticity under bending 13000 N⁄mm2
Modulus of rupture under bending 88 N⁄mm2
Tension strength 90 N⁄mm2
Compression strength 61 N⁄mm2
Brinell hardness perpendicular to the fibres 34 N⁄mm2
Janka Hardness 4.5 kN
Nail withdrawal strength in N per mm depth and mm diameter 17 N⁄mm2
Natural durability and treatability (according to en 350-2)
Fungi Class 2 durable
Dry wood borers durable
Termites Class M – moderately durable
Treatability 4 – not permeable

Natural durability is based on mature heartwood. Sapwood must always be considered as non durable against wood destroying agents.