We supply Pond Liner Underlay in two grades, a budget Pond Grade Underlay (150-180gsm) and a more robust Heavy Duty Underlay (250-260gsm). The Heavy Duty Grade is simply identified as being the thicker of the two, as both are mechanically bonded, non-woven, needle-punched, polypropylene geotextiles.

The two most important qualities to consider for an underlay when used as a pond liner protector is the degree of puncture resistance and overall tensile strength. These are the first factors to compare when selecting an underlay material. (Note:- colour of underlay material can vary from white to light grey depending on supply and has no bearing on specification). We suggest using the highest grade of Underlay your budget allows to ensure the maximum possible long term protection for your liner.

The strong geotextile materials we select for our underlay are actually developed for commercial road building and ground stabilisation applications and are thus technically far superior than cheaper underlay felts. Our 50 years trading experience reinforces our belief that quality pond building begins with selecting high quality products from the industry leading suppliers. Using cheaper materials with a lower grade specification could potentially lead to a liner failure in years to come.

Heavy Duty Underlay (250-260gsm)

Our Pond Underlay Geotextiles offer exceptionally high performance and provide a highly effective protective barrier between substrate and liner. We recommend that our underlay is used beneath all our liners, not only to help protect liners from penetration by sharp stones, roots, etc, but also to reduce excessive localised stretching of the liner when settlement occurs.

We supply our Pond Grade Underlay as 2 metre wide rolls and cut to length sheets for Aquatic centres, and as full rolls 2m x 150m for larger landscaping work, direct to site if required.