Suppliers saw each log so that to receive from it the maximum quantity of boards or bars which quite strongly differ on quality.
In good boards for production of a flooring wood fibers are usually located parallel to a surface of a board or at an angle to a surface to 45 ° (rice, 2). Timber with a cross arrangement of wood fibers to a surface of a board represents a low grade of construction wood.
At production of a flooring try to stack boards up that party that is closer to tree bark.
Good timber has less knots and smaller probability of a buckling.
Otherwise edges of a board will rise at a buckling, and it will accumulate even more water that will lead to wood rotting.
At a choice of preparations track that in them there were no longitudinal and cross cracks, stratification and splits of wood.
Construction wood is freshen or dried up. The timber dried in special furnaces is much more expensive fresh, and the wooden design made by you will dry out on the street in itself over time.