Properties of good timbers are:
It should be uniform.
It should be pleasant when cut freshly.
A clear ringing sound when struck indicates the timber is good.
Texture of good timber is fine and even.
In good timber grains are close.
Higher the density stronger is the timber.
Harder timbers are strong and durable.
Good timber do not warp under changing environmental conditions.
Timber should be capable of resisting shock loads.
Good timber do not deteriorate due to wear. This property should be looked into, if timber is to be used for flooring.
Timber should have high strength in bending, shear and direct compression.
Modulus of Elasticity:
Timber with higher modulus of elasticity are preferred in construction.
A good timber should have high resistance to fire.
Good timber has low water permeability.
Timber should be easily workable. It should not clog the saw.
Good timber is one which is capable of resisting the action of fungi and insects attack.
Good timber is free from defects like dead knots, shakes and cracks.