Building thermal insulation and sound insulation is to improve the comfort level and energy-saving effect of the building, its basic principle is to close the shell of the building, reduce the transmission of heat and sound.

　　The commonly used building insulation and sound insulation method is to cover the external wall of the building with a layer of insulation materials, such as mineral wool, foam, and so on, plus waterproof layer and finish layer. This effectively reduces the temperature difference between the inside and outside of the building, reducing energy loss, and acting as a sound insulation. Or building roofs with insulation, such as expanded perlite, can also reduce energy loss and prevent noise transmission. You can also lay sound insulation boards on the indoor walls or ground, such as gypsum board, wood, etc., which can effectively isolate the sound transmission and improve the privacy and comfort of the room.

　　Building insulation and sound insulation cotton mainly has the following types:

　　Mineral wool: mainly made of rock, glass and other natural inorganic materials as raw materials, with good high temperature resistance and sound insulation performance.

　　Polyurethane foam: Made of polyurethane foam foam, with good thermal insulation and sealing properties.

　　Expanded perlite: natural rock as raw material, after high temperature melting and expansion processing, with good thermal insulation performance and durability.

　　Calcium silicon plate: inorganic material as raw material, after processing, with light weight, high strength, good heat insulation performance and other advantages.

　　Each kind of insulation and sound insulation cotton has its applicable occasions and characteristics, the selection needs to choose the appropriate materials and methods according to the actual situation, in order to achieve both energy saving and comfortable effect.