1. Regarding the choice of the floor, each of us has different ideas. Some people add a coat to the floor for the sake of beauty. Some people think it doesn't matter. Let's take a look at the above point of view.
2. What is needed, the reason is: the floor mat below can play the functions of moisture-proof, dust-proof, insect-proof, easy to install and maintain, keep warm and so on. In fact, it is not. The editor thinks that these reasons are valid, especially for the weather in the south, which is relatively humid, so this is indeed its advantage.
3. If you don't need it, the reason for it is that the ground mat is convenient for you to level the ground, or the foot feels better, or the height is not enough. If the ground is flat enough and the thickness is sufficient, no floor mat is needed. The price of floor mats is similar to leveling, because the thin floor mats cannot cover the pipes at all, and the thick ones are used for a long time, and they are easy to warp where the floors are combined. This is indeed true for houses in the north, and moisture protection was still very important in the south at that time.