waterproofing and insulation at construction site, roof sealing process of synthetic membrane with hot air hand tool

activity air bituminous building closeup coating construction covering damp detail equipment flat floor hand hot industry insulated insulation laborer major material membrane process proofing prorect pvc recovering refurbishment renewal roof roofing sealing sheet sinthetic site solare system technique technology tempo tool underlayment vaporbarrier vinylroll waterproof waterproofing work