Who can talk about the disadvantages and advantages of pvc foam board?

1, good thermal insulation performance. The thermal conductivity is about 0.025, which is a good material for building insulation.

2. Good waterproof performance. The foam hole is closed, the sealing rate is 95%, and rainwater will not seep out of the hole;

3. As a result of on-site spraying, an integral waterproof layer is formed without seams, which can not be achieved by any polymer coiled material, thus reducing the maintenance workload;

4. Good adhesion. Can be bonded with wood, metal, masonry, glass and other materials very firmly, not afraid of being exposed to strong winds;

5. It is very suitable for the maintenance of new roofs or old roofs, especially for the repair of old roofs. There is no need to remove the original waterproof layer and insulation layer, just remove the dust and sand impurities on the surface and spray;

6. The construction is simple and quick. Each worker can spray more than 200 square meters every day, which is conducive to grabbing progress;

7. The sealing head has a simple structure. Spray foamed polyurethane closed head, without special treatment, greatly simplified. If coiled material is used, a groove should be left at the parapet, and the end should be in the groove; If you can't leave the groove, you need to seal your head with a flat iron and apply caulking paste;

8. Good economic benefits. If the insulation layer and waterproof layer are separated, not only the cost is high, but also the construction period is long, and the foamed polyurethane can survive once;

9, good aging resistance. According to foreign engineering summary and research test, the aging resistance of polyurethane foam can reach 30 years.

Disadvantages of pvc foam board:

1, when the temperature is lower than 10℃, the foaming rate of polyurethane foam will decrease. Therefore, the use is obviously limited by seasons;

2. Polyurethane foam spray molding speed is fast, and it is not easy to make a flat spray effect, and unevenness is a normal phenomenon;

3, used for roof waterproof and thermal insulation, the flatness can be relaxed, but the flatness of eaves gutter and gutter is not good, which will affect the drainage speed. So it should be used in conjunction with other waterproof materials.