1. Polyurethane rubber waterproof rigid foam is a kind of compact microcellular foam, with a closed cell rate of over 92%. It has smooth self-crust and is an excellent waterproof material. In the construction, the direct spray molding technology is adopted, so that the Pu hard foam layer does not have the complete water tightness of the whole joint, and the possibility of roof water infiltration along the joint is avoided.

2. Polyurethane rubber sheet has good heat preservation and energy saving effect. Pu rigid foam has low thermal conductivity, and its thermal insulation effect is incomparable to any other roofing thermal insulation material.

3. The load of polyurethane rubber sheet roof is light. Pu rigid foam has low density and light weight, so the roof load is light. The load above the roof supporting plate is one quarter of that of the traditional roof method, which is of great significance to improve the overall structure of the house and reduce the project cost, so it is also suitable for long-span thin-shell roof buildings.

4. The construction of polyurethane rubber sheet is convenient and the project progress is fast. Pu rigid foam roof adopts on-site foaming molding, with simple process equipment and convenient operation, and can be sprayed or poured. Can be used for complex roof construction, generally 3-4 people work, and can spray more than 20 cubic meters every day. Based on the thickness of the spraying layer of 30 mm, it can spray more than 700 square meters every day, which is more efficient than laying traditional materials, and at the same time reduces the labor intensity, improves the working environment and reduces the cost.