English 
The tidal temperature of the wall is improved. Generally, a vapor barrier layer is required for internal thermal insulation. However, the temperature penetration performance of external thermal insulation materials is much stronger than that of the main structure. Generally, condensation does not occur inside the wall. The increase in wall temperature further enhances the thermal insulation performance of the wall. It is beneficial to keep the room temperature stable, and the external wall is used for thermal insulation. Because the structural layer with a large heat storage capacity of the wall is on the inner side of the wall, it is conducive to the stability of the room temperature.
Increase the usable area of the house. It can avoid damage to the insulation layer caused by the second decoration.
As far as I know, there are 3 types of foam boards, which are:
1. Polyurethane foam board, polyurethane foam board is an emerging organic polymer material, and now of them use this foam board;
2. Polystyrene 7, olefin foam board, which is used in some construction sites:
3. Poly 7, olefin foam board, which is used in very few places. Pure hand play, hope to accept.
