Common Flat Roof Fastener Failure Points

On the one hand, the weld seam can be a weak point, and on the other hand, the strength and quality of the mesh insert of the roofing membrane. In most cases, the failure is due to the roofing membrane under the stress plates being ripped out or the stress plate is unclipped. If the roofing membrane has high mechanical properties, then the fastener can also be ripped out of the substrate.

The original position of the round metal stress plate is still clearly visible. The roofing membrane has been ripped out along the fastener. From this we can deduct that the wind suction stress, and thereby the force applied to the attachment point, was too large. A reduction of the fastener gap reduces the stress applied to the fastening point and thereby also reduces the risk of damage.