Which is better, building exterior wall insulation, polyurethane foam or benzene board?

At present, the best insulation material for the exterior wall of domestic buildings is polyurethane foam.

Polyurethane foam is divided into spray polyurethane foam and polyurethane foam sheet.

Two usages. 1-Polyurethane foam thermal conductivity.

Only, it has the lowest thermal conductivity of all insulation materials at present. The insulation effect of 30mm thick polyurethane rigid foam is equivalent to that of 70mm thick polystyrene board.

The closed cell rate of 2-polyurethane foam is more than 95%, which is an impermeable material, so it has a good waterproof effect and has two functions: heat preservation and waterproofing. The water absorption rate of polystyrene board is very high, and the end is not well treated, which is easy to cause waterproof failure.

3- If sprayed polyurethane foam is used, continuous seamless spraying construction will have better waterproof effect. The surface requirements for the base layer are also low. Adaptable to any shape of structure, especially profiled layers and exterior curtain wall systems.

Exterior wall insulation polyurethane foam: 1. Excellent impermeable materials 2. Convenient construction 3. Good thermal insulation and thermal insulation performance, and very good energy-saving effect 4. 5. Theoretically, the service life can reach 10 years.

There are too many of the best exterior wall insulation materials in the country.

Each has its own merits, the thermal insulation effect of polystyrene board is not as good as polyurethane, but the external wall uses polystyrene board to do thermal insulation in foreign countries so far has 40 years of use experience, polystyrene board is relatively cheap, the relevant standards and specifications are more complete, in the early stage of China's exterior wall insulation materials are widely used, due to the fire caused by a large number of personnel, the material should have a certain height limit and fire isolation measures when in use, at present, there are many domestic manufacturers to develop a homogeneous fireproof insulation board with good technical performance, it is understood that the material, bulk density light, Good thermal insulation effect and other advantages.

Thermal insulation and fireproof polyurethane are good, and polystyrene board is cheap.

Purely according to the material, the insulation performance of polyurethane is higher, and it is difficult to construct a single polyurethane system according to the construction, and the only way is to use a composite system; The cost of the same composite system is higher than that of benzene board; Moreover, polyurethane construction has relatively high requirements for temperature, humidity, weather and other factors, unlike benzene board, which has wide adaptability, and the thickness of polyurethane construction is not easy to control; In terms of insulation system, if it meets the design requirements, it should be comparable;

At present, the main reason for the stability and cost of the system is whether it can be promoted, a single material is difficult to achieve the common recognition of the Ministry of Housing and Urban-Rural Development and the fire protection, the fire performance with low thermal conductivity is not good, and the thermal insulation effect with good fire performance is not good; Personally, I think that the polystyrene board composite system is more economical.

Polyurethane is better, benzene is toxic.

Summary. There is a benzene board on the outer wall, can you continue to do polyurethane foam?

OK. It can be done, polyurethane foaming adopts on-site spraying foaming process, and the adhesion is very good. In addition, the polyurethane spraying has no joints, which makes up for the gaps in the benzene board, and the thermal insulation effect is greatly improved.

There is a benzene board on the outer wall, can you continue to do polyurethane foam?

Kiss. There is a benzene board on the outer wall, can you continue to crack and do polyurethane foaming, you can roll it to be high, polyurethane foaming adopts on-site spraying foaming process, and the adhesion is very good. In addition, the polyurethane spraying has no joints, which makes up for the gaps in the benzene board, and the thermal insulation effect is greatly improved.

Our company has been engaged in exterior wall insulation for more than 20 years, and has been deeply involved in the exterior wall insulation industry for more than 20 years, and the exterior wall insulation and decoration system has been updated four times. The integrated system of rigid foam polyurethane insulation and decoration has low thermal conductivity and low waterproof performance, which is one of the first choices for most exterior wall insulation.

1: The insulation layer on the outside of the external wall of the building greatly reduces the influence of natural temperature, humidity, ultraviolet rays, rain and snow on the main body.

After adopting the external insulation technology, the large temperature change inside the wall caused by the continuous change of the outdoor climate occurs in the outer insulation layer, so that the temperature of the internal main wall increases in winter, the humidity decreases, the temperature change is relatively gentle, the thermal stress is reduced, the fuel transportation is less, and the temperature change of the concrete wall is greatly weakened, so that the stress generated by the temperature inside the structure can be reduced.

2: The main wall body has a good thermal insulation layer of the outer protection, which can improve the durability of the wall and prolong the life of the main structure of the building beam. The risk of cracks, deformation or breakage in the main wall is greatly reduced, and cracks are avoided.

In addition, in the horizontal length direction of the building, the temperature deformation of the structural wall can also be greatly reduced due to the enclosure effect of the external insulation layer, and the external thermal insulation or sandwich composite wall of the new wall material does not have to be multiplied by the reduction coefficient in the design of the temperature shrinkage joint spacing of the building.

3.Increase the area of residential use.

Compared with the external wall insulation method, the external wall insulation can increase the usable area of each household.

4.It is convenient to renovate the existing houses with energy saving.

It is very convenient for the energy-saving renovation of existing houses, which does not affect the normal life of residents and does not affect the original interior decoration.

4.Facade treatment is facilitated.

Project case sharing.

The exterior wall polyurethane composite panel external insulation façade not only has a variety of finishes for the new building, but also makes the building obtain better thermal insulation effect when the existing building is renovated for energy saving, and the façade is completely new.

Exterior wall insulation is better than ordinary benzene board.

Advantages of benzene board:

Extruded plastic board and benzene board are currently used more in the insulation system, and they have the advantages of good thermal insulation effect and convenient construction. Extruded plastic board is a closed-cell honeycomb structure, both compressive strength and thermal conductivity system are better than benzene board, but the discrete tensile strength of extruded plastic board is very large, the thermal conductivity of extruded plastic board is less than or equal to, and benzene board is less than or equal to, from this point it can also be seen that the same thickness of extruded plastic board itself in the thermal insulation effect of superiority, therefore, when doing roof, underground house and runway insulation, the world usually uses extruded plastic board.

When doing exterior wall insulation, the advantages of extruded plastic board have become its disadvantages, extrusion, high strength, impermeability, and too smooth surface, so that with climate change, cracks and other problems are prone to occur; Moreover, its brittleness is large, and if the insulation nail is fixed on the board in the construction branch chaos when doing external thermal insulation, it is easy to destroy the board in a large area, and these aspects of polystyrene board reflect its advantages. Moreover, there is no industry standard for extruded plastic board for exterior wall insulation.

Generally speaking, extruded plastic board is suitable for roof insulation (high compressive strength), external wall insulation (thin thickness, does not occupy the inner area of the room), and benzene board is suitable for external wall insulation (flexible, breathable, and has the standards of the Ministry of Construction).

Not a thing. The full name of polystyrene board is polystyrene foam board, which can also be called foam board, EPS, etc., polystyrene board is mainly a white solid with a fine closed-cell structure that is heated in the mold after the heat pre-release, and the fire rating of polystyrene board can only be done B1, and there is a potential fire hazard. Polymerized polystyrene board (AEPS board), polymerized polystyrene board (AEPS board) is safer to use than polystyrene board.

Polymerized polystyrene board (AEPS board) has non-flammability, and the use in the external wall of the building can not only play a role in heat insulation, but also will not burn rapidly even in the event of a fire, polymerized polystyrene board (AEPS board): 1. After the polymerization polystyrene board (AEPS board) is reprocessed, the physical properties of the ordinary polystyrene board are changed, which is conducive to the safety of the external wall insulation system; 2. The polymerization polystyrene board (AEPS board) uses a special process to improve the fire rating of the polystyrene board, reaching Class A, with a higher fire rating and safer use; 3. Polymerized polystyrene board (AEPS board) has stronger toughness and stronger strength than ordinary polystyrene board;

As a common external wall insulation material, polystyrene board will be prepared for some different practices. But generally speaking, the installation method of polystyrene board is roughly the same, including:1

Paste adhesive on the surface of the wall to make the base layer of the insulation layer; 2.Lay waterproof and separator films on the base layer to further strengthen the moisture-proof effect of the insulation layer; 3.The polystyrene board is embedded in the bracket and the plate is fastened with a retainer; Banquet Sale 4

Tie the polystyrene board with stretch film to form an insulation layer; 5.The insulation layer is smeared, sanded, trimmed, and the decorative surface layer is installed at the same time. Because there are many details and factors to consider in construction, different builders may be different in some links, but the core of the whole construction process is basically the same, which is to ensure thermal insulation performance, and at the same time pay attention to the safety of waterproofing and fire prevention.