The most common colors are white and blue. White (polystyrene board, commonly known as benzene board) is used for exterior walls, and blue (extruded board) is used for indoor geothermal and wall surfaces. The common thickness is 3cm or 5cm. Under certain conditions, the risk caused by condensation will be smaller. For extruded boards with skin and compressive strength of 250KPa and above, the water absorption rate is required to be less than 1.5%. For water absorption standard requirements. Closed-cell foam chemical structure and honeycomb physical structure, light weight, easy to use. It has the characteristics of high strength, easy to cut and transport, not easy to damage and install.

The structure of the extruded board is stable, it will not age, decompose, or produce harmful substances. Its chemical properties are extremely stable. It will not degrade due to water absorption and corrosion, which will reduce its performance. It can still maintain its superior performance in high temperature environment.

The cover is not tight during storage, resulting in local immersion. At this time, the immersion part is very easy to deform. The solution is the same, that is, pay attention to the storage method, do not soak in water for a long time or directly contact the water source. The types and specifications of all constituent materials and components shall meet the design requirements and relevant standards. The thermal conductivity, density, compression strength and combustion performance of the extruded board shall meet the design requirements.

The white extruded board is a high-performance rigid foam plastic with a honeycomb closed-cell structure made by extrusion molding. The interconnected walls of these honeycomb structures have a consistent thickness and no gaps at all. Therefore, the thermal insulation performance formed by the extrusion process. The extruded board is light in weight and has a thermal insulation effect. It is used on the exterior walls of buildings to effectively delay the change of the indoor and outdoor air temperature difference, keep warm in winter and insulate in summer, and is also very easy to construct.