Cold storage roof spray polyurethane foam technical requirements

The first layer of spray thickness of not more than 0.5cm, each layer thickness of not more than 3cm. rigid polyurethane spray and grass-roots wall solid combination, is to ensure the stability of the basic premise of the external insulation layer. For the wall, its surface should do interface treatment, if the surface layer exists loose, hollow drum situation, must be carefully cleaned up to ensure that the hard foam polyurethane spraying insulation layer and the wall close combination. Rigid foam polyurethane spray exterior insulation system should be able to resist the combined effect of the following factors, that is, the most unfavorable local temperature and humidity conditions, to withstand the wind, self-weight and normal collision and other internal and external combination of loads, the insulation layer is not separated from the grass-roots level, falling off and in a moist state to maintain stability.