In building insulation projects, a single insulation material is often difficult to meet complex functional requirements. The use of graphite polystyrene board in combination with other insulation materials can achieve complementary advantages. From base treatment to surface construction, different materials play a unique role in each link, and the comprehensive performance of the insulation system can be significantly improved through scientific combination.
In the base treatment stage, in order to ensure the stability of the insulation system, inorganic insulation mortar is often used as a transition material. Graphite polystyrene board is light and flexible. Directly pasting it on the wall may cause uneven force due to the uneven base. Inorganic insulation mortar has good workability and adhesion, and can fill small depressions on the wall to form a flat and firm base. During construction, first apply a layer of inorganic insulation mortar on the wall surface, wait for it to dry initially, and then paste the graphite polystyrene board. This not only enhances the bonding strength between the board and the wall, but also effectively prevents heat loss caused by the cold and hot bridge effect of the base, laying a solid foundation for the subsequent insulation layer.
In the main structure of the insulation layer, graphite polystyrene board can form a composite insulation structure with rock wool board. Graphite polystyrene board has excellent thermal insulation performance and low thermal conductivity, but its fire resistance is relatively weak; rock wool board has the characteristics of Class A non-combustibility, high temperature resistance and strong stability. The two are used together. First, a layer of graphite polystyrene board is laid on the outside of the building's exterior wall to give full play to its efficient thermal insulation effect and reduce heat conduction; then the rock wool board is covered on the outside of the graphite polystyrene board as a fire isolation belt or overall protective layer to improve the fire safety level of the system. This "insulation + fire prevention" combination mode not only meets the requirements of building energy conservation, but also effectively prevents the spread of fire. It is especially suitable for high-rise buildings and crowded places.
For areas prone to thermal bridges such as door and window openings and wall corners, polyurethane foam sealants can be used in combination with graphite polystyrene board. These areas have complex shapes, and conventional insulation boards are difficult to fit tightly, which easily forms heat transfer channels. Polyurethane foam sealant has good elasticity and sealing properties. It can expand and solidify in the gap, fill tiny gaps, and block heat and cold conduction. During construction, first install graphite polystyrene board, reserve the edges of door and window openings, then spray polyurethane foam sealant on the gaps, wait for it to solidify, cut it flat, and then perform surface treatment. In this way, the thermal bridge effect can be effectively reduced and the overall energy efficiency of the insulation system can be improved.
In the surface protection of the insulation system, the glass fiber mesh works synergistically with the graphite polystyrene board to enhance the system's crack resistance. Graphite polystyrene board may produce slight deformations under temperature changes or external forces. If the surface material is not tough enough, cracks are likely to occur, affecting the insulation and waterproofing effects. The glass fiber mesh has the characteristics of high strength and high toughness. It is embedded in the plastering mortar to form a protective layer. During construction, first apply a layer of plastering mortar on the surface of the graphite polystyrene board, then lay the glass fiber mesh, and press it into the mortar with a spatula to ensure that the mesh is completely covered and wrinkle-free. In this way, when the insulation layer is deformed, the fiberglass mesh can disperse the stress, prevent the surface layer from cracking, and extend the service life of the insulation system.
For roof insulation projects, graphite polystyrene board can be used in combination with ceramsite concrete. The roof is exposed to wind, sun and rain for a long time and needs to have a certain load-bearing capacity. Graphite polystyrene board is laid on the roof structure layer to provide efficient insulation performance; ceramsite concrete, as a protective layer, has light weight, heat insulation, sound insulation and good compressive strength, covering the surface of graphite polystyrene board, which can not only protect the insulation board from external damage, but also play a role in slope drainage. In addition, the pores in ceramsite concrete can further enhance the insulation effect, and together with graphite polystyrene board, a complete roof insulation and waterproof system is constructed.
In special environments such as cold storage that have extremely high requirements for insulation and moisture resistance, graphite polystyrene board can be used in combination with moisture-proof vapor barrier membranes. The temperature inside the cold storage is low, and the external hot air is easy to produce condensation water when it encounters cold. If the water penetrates into the insulation layer, the insulation effect will be seriously reduced. The moisture-proof vapor barrier film has an extremely low water vapor permeability. It is laid between the graphite polystyrene board and the base layer, which can effectively prevent the entry of external water vapor. At the same time, a layer of waterproof membrane is set on the outside of the insulation board, and double protection ensures that the insulation system is dry. This combination method can keep the cold storage in a stable low-temperature environment, reduce energy consumption and loss, and ensure the quality of stored items.
The combination of graphite polystyrene board and other insulation materials requires comprehensive consideration of building functional requirements, environmental conditions and construction technology. By rationally selecting materials and scientifically combining them, giving full play to the advantages of each material, it is possible to build an insulation system with better performance, higher safety and longer service life, providing a strong guarantee for building energy conservation and comfortable environment creation.
