Geomembrane patching? Landfill cooling?
Questions and answers from the GMA Techline
Would it be acceptable to repair an existing 30-mil HDPE geomembrane liner system with 60-mil HDPE geomembrane patches? Is there any research documenting this application? Are there any additional welding preparation procedures required for this application?
(Byran | Maryland)
And the answer is “yes.” That said, a 30-mil sheet is extremely thin and grinding will have to be carefully done as well as being careful with the temperature of the extrudate. We would recommend regular trial strips to observe the underside of the weld to see if the 30-mil sheet is not unduly distorted. Tell us how you make out in this regard.