1. If the spraying surface is not disposed of glass, plastic, lubricated ceramics, metal, rubber and other materials can not be constructed, spraying the surface of water seepage, dust, oil and other conditions to stop construction.

2. Nozzle from the working surface of the interval should be adjusted according to the pressure of the spraying equipment, should not exceed 1.5m, spraying nozzle movement speed to be uniform.

3. Spraying construction of the ambient temperature should be 10 ~ 40 ℃, wind speed should not be greater than 5m, relative humidity should be less than 80%, should not be constructed on rainy days.

4. The temperature of AB material of spraying equipment should be set between 45~55 degrees under normal condition, the temperature of pipeline should be about 5 degrees lower than the temperature of material, and the pressure value should be set between 1200~1500. After spraying the polyurethane black material hard foam insulation layer should be fully matured 48h~72h before the next process construction.

5. After spraying the polyurethane black material hard foam insulation layer appearance flatness promised error not more than 6mm.

6. When spraying construction work, door and window openings and downwind openings should be covered to prevent foam splashing and pollution of the environment.

7. After spraying in the next process before construction, polyurethane rigid foam insulation layer should be prevented from rain, suffer from rain should be completely dried before the next process construction.

8. Black material is sensitive to moisture and harmful to human body, so attention should be paid to storage and construction safety.