From the GMA Techline
Subject: Geomembrane costs — What is the average cost in U.S. dollars, for installation only, of 10,000m2 and 100,000m2 of PVC membrane and HDPE membrane? (Lindo, Louisiana)
Reply: I can’t give you an answer, since costs vary with the thickness of the geomembrane, the site location, and time of year. What I’d recommend is for you to contact the installers directly. They are most cooperative in this regard.
Please use the annual Specifier’s Guide by Geosynthetics magazine to find all of the major geomembrane installers.