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.