External wall insulation board polystyrene foam board thickness of not less than how much
The heat transfer of the material is more difficult (that is, the smaller the thermal conductivity), the better the thermal insulation performance Generally speaking, the common characteristics of thermal insulation materials are lightweight, loose, porous or fibrous, with its internal non-flow of air to block the heat conduction One of the inorganic materials are noncombustible, the use of wide temperature, chemical resistance and other characteristics of good, organic materials, forging out forging pedal fist, but there is a low water absorption, impermeability and other characteristics Polystyrene running plastic has two types of intumescent and extruded, self-extinguishing after adding flame retardant Expanded polystyrene sheet due to light and convenient, the use of very common; Extruded polystyrene high strength, excellent weather resistance, there will be greater development Polyurethane foam according to the different materials used, divided into polyether and polyester type two, made by the foam reaction, there are soft and steary of the points In addition, there is a kind of aluminum foil insulation material, the use of aluminum foil and kraft paper after bonding, and corrugated paper made of composite sheet can also be made of polyvinyl chloride sheet made of aluminum can be multi-layer set, as a sandwich wall or roof, Light, moisture, insulation, heat insulation performance are good
No, there is a big difference between the two
Cement foam board is the national "civil building exterior insulation system and external wall decoration fire temporary provisions" and the introduction of the basic principle is the use of cement noncombustible and concrete in a large number of closed pores to achieve fire, light, insulation effect. It is a kind of cement-based lightweight porous inorganic fireproof insulation board which is prepared by mixing and molding with foam and cement, mixing and mixing. The combustion performance is A1 grade, which is Currently used in the best products of fire isolation zone Concrete foam board is a class of modern building industry in the application of a wide range of inorganic insulation materials
