Winter can be a tough season for low-quality pond liners, especially those that become brittle in cold temperatures. In a long cold season with repeated freeze-thaw cycles, the ground shifts slightly as it heaves and sinks. A liner that has lost its flexibility can't accommodate those changes, and will crack, leaving you with leaks you may not detect until the spring thaw.
A high-quality reinforced polyethylene (RPE) liner remains flexible in sub-zero temperatures thanks to its layered construction. It's certified to resist cracking at temperatures as low as -85°F.
