Which of these is NOT among common methods for joining gutter sections to metal roofing systems?

The use of adhesive bonding as a method for joining gutter sections to metal roofing systems is not commonly practiced. In roofing applications, especially when working with metal, the emphasis is often placed on creating strong and durable mechanical connections that can withstand various environmental conditions. Riveting, welding, and screwing are traditional methods that provide robust connections capable of handling the stress and movement inherent in roofing systems.

Riveting forms a solid connection that allows for some flexibility, preventing damage due to thermal expansion or contraction. Welding creates a permanent bond that is very strong, while screwing allows for easier disassembly and reassembly, making maintenance simpler. In contrast, adhesive bonding does not offer the same level of mechanical strength and durability needed for the structural requirements of gutters, particularly when dealing with the potential for heavy rains and debris accumulation. Thus, while it may have applications in other areas, adhesive bonding is not standard for joining gutter sections to metal roofing systems.