UnderGuard Geotextile Underlayment
The biggest contributors to pond liners failing are poor, unstable soil conditions that cause rips and tears from rocks and boulders. Shifting soil creates pockets and voids under your pond liner, forcing it to stretch under the weight of the water. Use UnderGuard Geotextile Underlayment to extend the life of your pond liner.
Underlayment is manufactured in 5', 10' 15' widths and will ship to you in one or more pieces (equal to the total square footage of the pond liner in liner/geo combo). Simply lay the pieces next to each other and install the pond liner.
The standard underlayment is 6oz, but 4oz and 8oz are available for bulk orders (10+ rolls) upon request.