What is the purpose of using a pond liner in water garden or pond construction, and how does it help in maintaining water retention and preventing leaks?

A pond liner is used in water garden or pond construction to create a waterproof barrier that prevents water from seeping into the ground. Its main purpose is to retain water effectively, ensuring that the pond remains filled and stable over time.

Natural soil alone often cannot hold water efficiently because it contains small cracks, sand, or porous materials that allow leakage. A pond liner — made from materials like HDPE (High-Density Polyethylene), EPDM rubber, or PVC — acts as a durable and flexible membrane that lines the bottom and sides of the pond.

By sealing the pond, the liner helps:

Prevent water loss due to seepage.

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