What is the proper seaming procedure for TPO membranes?

The proper seaming procedure for TPO (Thermoplastic Polyolefin) membranes is hot-air welding. This method is specifically designed for TPO, as it creates a strong bond by using hot air to raise the temperature of the membrane's seams to the point where they become pliable. The two overlapping sheets are then pressed together, resulting in a watertight seal once cooled.

Hot-air welding is favored for its ability to provide a continuous seam without the use of additional materials, which is crucial for maintaining the integrity and durability of the roof system. It ensures that the seams are not only robust but also provide excellent resistance to water infiltration and the effects of weathering.

Other methods, while they may be applicable in certain situations or with specific materials, do not provide the same level of reliability or effectiveness for TPO membranes.