Air isolation type thermal insulation waterproof composite roofing and its construction method

The air separating heat insulating waterproof composite roofing belongs to the field of roofing building structure technology. The roofing structure includes several roofing blocks spread in the leveling layer of roofing board, flexible sealing glue layers set inside the slots between roofing blocks, waterproof sealing strips between flexible sealing glue layers and puffing filled in the joint seams. The construction process includes the following steps: spreading leveling layer on the roofing board with cement mortar and laying composite roofing boards on the leveling layer; filling the seams between roofing boards with hydrophobic flexible sealing glue; pressing flexible waterproof sealing strips into the hydrophobic flexible sealing glue; and smearing the seams with puffing. The present invention has the advantages of being light, anticracking, heat insulating, waterproof, low in cost, etc.