Various materials used in sheathing do not let the cold and hot air outside at the point of thermal insulation, but also make our house a gas room. Sheathing in this state is extremely harmful to human health. Since most of our daily life is spent at home, it is extremely important that the house is ventilated and the indoor environment is healthy. In addition to these, the jacketing due to the possible fire that may occur in the building will accelerate the fire.