What does the term "compression web" refer to in roofing?

"Compression web" refers to a component in a truss system that is designed specifically to support loads. In roofing, trusses are commonly used to create a sturdy framework that can bear the weight of the roofing materials, as well as any additional loads from snow, wind, or other external forces.

The compression web is the part of the truss that experiences compressive forces, helping to transfer loads effectively from the roof to the supporting walls or foundation. This ensures stability and structural integrity, which are critical in roofing applications.

The other options suggest unrelated concepts. For instance, waterproofing methods focus on preventing moisture infiltration, while decorative elements pertain to aesthetics rather than structural functions. Similarly, insulation layers are meant for thermal performance rather than load-bearing capacity. Thus, recognizing the "compression web" as a member that supports truss loads clarifies its primary role in roofing systems.