Cattle crossing carpet and gravel or dirt access roads.
Pond underlayment carpet.
Carpet is sometimes suggested as a pond liner underlay and you might get away with this just ensure that the carpet is a man made fibre such as polypropylene as a natural fabric such as wool will rot over time reducing it s effectiveness as a barrier and leaving the pond liner exposed to danger.
The underlayment is light in weight spreads easily and has a non slippery surface making installation quick and easy.
Water is easy to move and replace but beautiful fish and other aquatic creatures are often not cooperative.
Rock and boulder padding.
Liner and underlayment epdm pond liner is extremely flexible and will conform easily to whatever shape pond your desire.
Pond underlayment has only one job and that is to protect your pond liner.
Aquascape non woven geotextile underlayment is used to protect pond liner from rocks roots and other sharp objects that may damage the liner.
45 mil pond liner is very strong and puncture resistant but it does have its limits.
A proper underlayment is considered a non woven geotextile that is a fancy term for saying it is a really tough material that is lightweight and easy to work with.
Walkway driveway patio under paver.
Garden and commercial landscape fabric.
Since patching systems require a clean and dry surface on which to bond a puncture to the liner typically means draining the pond for a repair.
Using a 6oz thickness of underlayment can improve the punture resistance of your pond liner by 400.
Pond underlayment provides additional protection for flexible rubber or plastic liners.