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Weld or sew?

News, Q&A: GMA Techline | June 1, 2016 | By:

Questions and answers from the GMA Techline

We have a liner contractor who would like to wedge-weld geotextile rather than sew it. The material is simply a cushion layer below the 40-mil geomembrane and the contractor is concerned the sewn seams will affect wedge welding of the above geomembrane.

Do you have a recommendation on this or a direction you can point me in for publications?

Hoj | USA

Hi Hoj,

It is a rather good idea because there is less of a “bump” in comparison to a sewn seam. That said, there are many options. We will send you a study we did for joining GCL overlap seams via eight methods. With it, I think you can see where sewn prayer seams fit into other joining methods.

Bob Koerner | GMA Techline

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