Common Weak Points in Flat Roof Fastening Systems

With the wind uplift test, there are three weak points or possible scenarios which could cause a system failure.

Roof Membrane and Stress Plate Connection Failures

1. The connection between the roofing membrane and the stress plate. This is usually the weakest link in the chain. The failure load largely depends on the mechanical properties of the roofing membrane.

Stress Plate and Fastener Connection Failures

2. The connection between the stress plate and the screw. Here, the failure load depends largely on the material of the stress plate and the geometry of the screw head.

Fastener Pull-Out Failures Within the Roof Substrate

3. The connection between the screw and the substrate.