Pond & Lake Liner Protection
Lets face it pond liners are expensive, especially the rubber type i.e Butyl Rubber or EPDM pond liners - so ask yourself why spend so much money on an expensive pond liner only to be sold a lightweight / cheap underlay that is not up to the job? A lot of retailers sell pond liners almost at cost price - but make a hugh margin by selling lightweight or inappropriate matting to "protect" the liner.
Can you imagine if a pond is 8.0m x 6.0m x 1.50m deep for example, that is a lot of water / weight on a pond liner and if a lightweight protective underlay was used on top of i.e shale / sharp stones, then over time there is a good possibility the stone will work it way through the geotextile and eventually puncture the liner.
There also may be an occassion that a person might climb into a pond to i.e. separate water lillies - this extra load may also lead to a premature liner failure.
If buying protective underlay / pond fleece / geotextile underlay from an aquatic outlet or online retailer. Here are some general guidelines
General ground / rough ground - 250gsm / Polyfelt TS60 260gsm protective underlay
Box Welded Liners / Tailored Liners Polyfelt TS50 200gsm
Irrigation tank liners 260gsm / 300gsm / 400gsm dependent upon the tank
Polyfelt TS60 260gsm protective underlay, does not require a sand binding for general ponds. In the photo above we used Polyfelt TS60 260gsm protective matting on a pond with rough substrate measuring almost 1900sqm...so it gives you an idea of the strength of the material.Read More