Polyurethane roof waterproof insulation construction step

1, grassroots processing

First, the basic treatment is carried out so that the roof (wall surface) is basically flat, without floating ash and oil.

Function characteristics: fixed base moisture

2, spraying rigid polyurethane foam

The rigid polyurethane foam is sprayed on the base surface by special equipment to form a dense foam material. According to the thickness of the insulation layer, one construction work surface can be sprayed several times, and the construction work surface of the day must be continuously sprayed on the same day. After 24 hours of spraying, partial trimming can be performed with a hand-held planer.

Function characteristics: excellent water resistance, excellent heat preservation.

3, batch coating plaster

Apply the surface glue to the surface of the polyurethane foam. During the construction, the surface should be flat and maintain a certain humidity.

Function, characteristics: to ensure the strength of the outer layer.

4, join the grid cloth

The enamel glue is not dried, the glass fiber mesh cloth is covered on the surface of the glue, and the mesh cloth is pressed into the glue with a batch knife.

Function and characteristics: After the glue is dried, the force of the mesh cloth on each other can play a role in crack resistance and effectively prevent water leakage.

5, batch coating waterproof anti-cracking glue

After the previous layer of the glue is dried, the glue is applied again, and the thickness of the two layers is not less than 2 mm, ensuring the firmness of the outer layer.

Function and characteristics: ensure the strength of the outer layer and effectively prevent water leakage.