According to statistics, the main complaint problem about wooden doors is the door cover, and sometimes the door is still intact, but the door leaf and the door junction has already relaxed, because with the increase times of doors to open, screw will gradually loose, door leaf will gradually sink, resulting in poor switches and serious renovation will give you unnecessary trouble. So, when you choose a wooden door, try to check if the door can grip the nail strongly, so that door is not easy to fall off: The second, water resistance of the door is very important, especially the bathroom door, the door will exposed in moisture, its surface will be issued black, expansion, cracking, and sometimes result in the phenomenon of deep-fried chop. Door cover is direct contact with the ground; if the material isn’t improper then the doors will be the sink, mopping the floor, resulting in switching strictly cracking the ground.