How Cold Welds Occur
Cold welds occur in heat-welded membranePrimary Roof Covering - A single-ply membrane is a roof covering that uses one continuous layer of material to waterproof low-slope roofs. More roofs such as TPOPrimary Roof Covering - TPO (thermoplastic polyolefin) is a white roof covering used on flat (low slope) roofs, commonly installed on commercial buildings to create a continuous waterproof surface. More and PVC. During installation, adjacent sheets are heated and pressed together to form a continuous waterproof surface. A cold weld occurs when part of that seam does not fully fuse.
Cold welds are one of the most common sources of leaks on low-slope roofsRoof Types - Low-slope roofs (flat roofs) are a type of roof system with less than a 3:12 pitch, most commonly found on commercial and industrial buildings. More. Because they may not be visible from the surface, cold welds are often identified with a probe tool during roof inspections.
Cold welds typically result from installation conditions, not wear and tear. Because weather conditions and temperature change throughout the day, installers must regularly adjust weld settings and test welds throughout the day to prevent cold welds.