roof and pavement consultants

Observation From The Field: Cold Welded Seams

Benchmark Service: Construction Phase Services

Issue: Field membrane lap seams were “cold welded” due to a faulty portable gas-powered generator.

Solution: Two field membrane seams were covered with hot air welded membrane strips.

Possible Impact: This project was at a hospital, over a complex of operating rooms. Had the cold-welded field membrane seams not been identified and repaired, they would have eventually become open laps, allowing a large amount of water to enter the building.

Field membrane seam test cut performed to verify if properly hot air welded. Hot air welding membrane cover strip over failed (cold welded) seams.


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