Pond Liners

Quality Lining Co., Inc. lined ponds typically range from 1/2 to 10 acres in size. It is common that our clients have previously attempted to resolve problems with water retention through the addition of clay or by amending on-site soil with sodium bentonite to create a less permeable subgrade. A geomembrane pond liner has proven to be an absolute barrier to leakage and therefore is a solution that does not require that the client simply “cross their fingers” and hope for the best. The adage “do it right the first time” is applicable in this instance.

There are various pond liners available for installation on a prepared subgrade. Quality Lining Co., Inc. provides and installs PVC, Polypropylene (scrim-reinforced and non-reinforced), HDPE (High Density Polyethylene), and LLDPE (Linear-Low Density Polyethylene, scrim-reinforced and non-reinforced), as well as composite resin liners such as XR-5 and Coolguard HR Geomembranes. Most of the listed geomembranes are formulated for Ultraviolet and Ozone resistance (PVC is typically used in buried applications). HDPE, LLDPE, XR-5, and Coolguard are excellent geomembranes to use in an exposed environment. HDPE and LLDPE geomembranes are produced in a 23′ roll width and are also available with either a smooth surface or a textured surface. The textured surface provides for a heightened friction coefficient which holds onto a sloped subgrade and also provides for more of a “non-skid” surface for swimmers or foot traffic. HDPE and LLDPE Geomembrane pond liner thicknesses range from 40 to 100 mil with the most commonly used thickness being either 40-mil (.040″) or 60-mil (.060″). Considering the wide roll width, HDPE and LLDPE pond liners may be deployed over large areas in a relatively short period of time. The installation of a pond liner must be accomplished with specialized seam welding equipment in the hands of trained technicians. Testing of seams also requires various testing apparatuses that are designed to perform different tests such as peel, shear, vacuum, and spark testing. The actual test to be performed is determined by the seam type. Seams are made with wedge welders on long and straight field seams and extrusion welders are utilized for detail seams, pipe boots, etc. It is very important that a geomembrane be installed by experienced technicians that are familiar with inherent factors to a particular geomembrane such as expansion / contraction influences, welding parameters, quality control procedure, documentation, etc.