Friends who live on the top floor have the same problem, which is "cold in winter and hot in summer". Although living on the top floor seems to have a big platform, it seems to be a good idea to have more space. It looks like it is exposed to the sun, violent storms, and the residents on the roof are the first to bear the brunt. Therefore, the thermal insulation measures on the roof are also of great concern to people on the "top floor". The first is the focus on thermal insulation materials, and the second is how to use the space on the roof to achieve the thermal insulation effect. Regarding thermal insulation materials and thermal insulation methods, many people may not know much about them, or they don’t know much about them. So, let’s take a look at the new roof thermal insulation materials and thermal insulation methods. Bar.
A new type of roof thermal insulation material
Thermal insulation material 1. Polyurethane rigid foam
Polyurethane rigid foam is a kind of closed-cell structure Low-density microporous foam material has low thermal conductivity, good thermal insulation performance, low water absorption, and easy construction and operation. The use of polyurethane rigid foam on roofs in my country is still in its infancy, and direct spraying is mainly used. It is generally spray-foamed on site and can be used on roofs of any complex structure. Usually 4-6 people can spray more than 15m3 of foam per day. Based on a spraying thickness of 30mm, the spraying area per day reaches 500m2, which is several times that of traditional materials.
Thermal insulation materials 2. Polystyrene board insulation layer
Polystyrene board is a roof panel made of cement and crushed polystyrene foam. The polystyrene board is located between the surface layer of fine stone concrete and the waterproof layer. In addition to its thermal insulation effect, it also acts as an isolation layer to prevent the waterproof layer from cracking when the surface layer of fine stone concrete expands and contracts. However, the commonly used overhead prefabricated reinforced concrete panels have only a 250mm gap between them and the parapet, which cannot prevent heat from being transmitted indoors. The dark waterproof layer under the gap will also absorb heat, causing the local temperature in the room to rise. In addition, under the same thermal insulation effect, the polystyrene board insulation layer can reduce the cost and save money. Compared with the prefabricated reinforced concrete overhead insulation layer, the cost of the polystyrene board insulation layer is reduced by about 2.66 yuan/m2, and the cost of the roof parapet is reduced by 0.45 yuan/m2 (1/2 brick wall) or 0.65 yuan/m2 (3 /4 brick wall). Compared with the foam concrete insulation layer, the cost of polystyrene board insulation layer can be reduced by 5.66 yuan/m2. However, the strength of polystyrene board is low, the fire resistance is not very good, and the construction performance is poor.
Thermal insulation material 3. FS cement fly ash thermal insulation roof
FS type thermal insulation material uses fly ash, sulfoaluminate cement, foam stabilizer and foaming agent The materials are poured and foamed under normal temperature and pressure. Its environmental protection and comprehensive utilization are good. The density of FS type insulation material is small, so the thermal conductivity is very low, so the insulation performance is good. What's more important is that it has a uniform closed-pore structure, and its water absorption rate and natural moisture content are both very low. It not only saves the watering and wetting process during construction, but also avoids moisture being absorbed by the insulation layer after the construction of the cement mortar leveling layer is completed. disadvantages. In addition, the FS-type insulated roof can reduce the thickness of the roof, the height of the parapet, the height of the roof pipes and stacks, thereby reducing costs and reducing the roof load. It is easy to transport during construction, which can reduce labor intensity and improve efficiency.
Thermal insulation materials 4. FB new composite roof panels
FB new composite roof panels integrate multiple functions such as lightweight, thermal insulation, heat insulation and waterproofing. Its overall dimensions are 1200mm*700mm*100mm. This roof panel changes on-site wet working processes such as roof insulation, waterproofing, and leveling to factory production, which improves efficiency. The roof project construction speed can be increased by 2-3 times, which is 2-3 times faster than that of traditional roofing. The weight is reduced by about 230kg/m2. FB's new composite roof panel uses three layers of thermal insulation layers: lightweight structural panels, thermal insulation panels and air layers. The thermal insulation effect is significantly better than traditional roofing methods.
In addition, it uses a composite waterproofing system that combines the rigid waterproofing of the structural board itself and the flexible waterproofing of the TS membrane. The joints of the panels are treated with two seams of sealing material caulking, sealing and waterproofing membrane, which can achieve both rigidity and softness. , Double insurance waterproof effect.
Introduction to the second thermal insulation method
In addition to using decoration materials for thermal insulation on the roof, you can also make full use of the space on the roof and transform it to achieve What is the effect of thermal insulation?
1. Air circulation insulation method: that is, building a hollow interlayer of about 30cm on the roof. When exposed to the sun, there is flowing air under the roof, which can effectively isolate indoor heat transfer. ;
2. Water insulation method: This method is a heat insulation method that many residents like to use. The roof is usually a shallow puddle with a depth of about 15cm, which can effectively and reasonably reduce the indoor temperature. It is relatively simple. However, the quality requirements for the roof are relatively high;
3. White paper reflection method: that is, laying a layer of white paper (tinfoil) with a smooth surface on the roof, which is not easy to stain with oil and can strongly reflect light and heat insulation;
p>
4. A 10 cm thick pearl sand insulation layer can be laid on the roof, and a layer of cement prefabricated insulation board can be added; if it is a reinforced concrete cast-in-situ roof, a 20 cm thick soil layer can be left on top to plant flowers and plants. It can not only beautify the environment, but also have thermal insulation effect.
I have introduced the content of new roof thermal insulation materials here. You may wish to refer to it when choosing roof thermal insulation materials in the future!