How to choose high-quality building wood square

One: you can measure the weight of the wood square by hand balance weight method, and the one with large water content must be heavier. Second: Touch the top of the wood square with your hand and feel its wetness. Three: Knocking nails can try to nail into the wood square with long nails. Assuming that the nail is simple, it means that the wood contrast is monotonous, while the humidity contrast is large. Four: the shaking method can make the finished wood square shake hard from one end. If the quality is unqualified, it is usually broken in two from the center.