Consideration of their use should include the overall reduction in maintenance in factoring their cost-effectiveness. UV resistance is product specific. PVC should have a covering of at least 12 inches of clean fill, with this it will last for decades. If your needs dictate exposure to direct sunlight and environmental weathering or if no fill material is avaiable, take a look at the Hypalon , RPP , EPDM , HDPE . Each of these geomembrane products bring attributes to your project.
Liners resist root penetration.
This concern can be avoided by subgrade soils prepared to be free of roots and organic material. L iner thicknesses are determined by the project engineer based on project site specific conditions. A liner is tested to survive exposure to a large variety of chemicals, even though the chemical could have some effects on the liner, without causing the liner to fail. Size may be affected by the panel weight that can be efficiently handled in the field. Pre-fabricating geomembranes allows us to seam liner under exact conditions, reducing field seaming requirements and costs.