Most of the buildings in foreign country have basement, the living space is not exposed to the external environment directly, that creates favourable condition of thermal insulation .But the basement is not supplied heating, especially in winter, there will be a considerable amount of heat, through the ground floor. Therefore, filling the high density of glass wool under the ground floor is essential, at the same time, laiding a certain thickness of rigid and semi-rigid glass wool among soil , the concrete floor in the basement and foundation .

Glass wool is a kind of good thermal insulation material, its application range is very wide, it is mainly used for building exteral insulation, pipe insulation, etc. Glass wool is commonly used in insulation parts below 200 degrees Celsius, for general or low temperature pipe insulation, building and rock wool is commonly used in insulation parts of the temperature at 500 degrees Celsius, more used in high temperature heat pipe or electric power equipment insulation.