There’s a few tricks to keeping flexible liners from shifting and moving after installation. First, make sure you order a large enough liner that the material overlaps the ground around the edges by at least two to three feet. Covering this extra material, often referred to as an apron or anchor barrier, with heavy rocks and other decorative materials holds down the liner and keeps it from moving under the weight of the water. Keep animals like dogs with sharp claws out of the pond so their paws don’t tear or yank the material lose.
If you’re dealing with a liner that floats or appears loose and wrinkled around the edges instead, you may need more cover materials to weigh it down. Water and gas that gets under the liner is powerful enough to lift it to the surface, creating a visible bubble that looks a little like the Loch Ness monster. Don’t let these mysterious bubbles ruin the look of your pond. Adding rocks or gravel may make cleaning a little more of a chore, but it’s the fastest way to counter any rising effects lifting the liner. Piercing the liner will let the gas or liquid out, but it doesn’t fix the problem in the long run and can cause leaks to develop even with patching.
