Pond Underlayment - 10' x 15'
Pond underlayment is installed before the liner in order to prevent punctures that may occur from rough or rocky ground. The underlayment serves a couple of purposes. First and foremost it is protection for the pond liner to keep leaks and holes from forming. It allows the ground to "breath" from underneath - often gases from the earth can get trapped causing the liner to be pushed up into the pond. The underlayment keeps this from happening.
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