Our Favorite Pond Liners And Liner Materials

The liner is the foundation of any pond. Here's what you need to know about liner options.

Your pond liner holds the water—everything depends on it. A quality liner:

Our top recommendation for most ponds.

Advantages: - Flexible and easy to work with - Handles complex shapes - Expands and contracts with temperature - Long lifespan (20-30+ years) - Fish and plant safe

Considerations: - Heavier than other options - Requires careful installation - Seams need proper adhesive

45 mil thickness is standard for most residential ponds.

A newer option gaining popularity.

Advantages: - Lighter than EPDM - Extremely puncture resistant - Long lifespan - Less expensive than EPDM

Considerations: - Less flexible in cold weather - Seams require heat welding

Budget-friendly but with limitations.

Advantages: - Lower cost - Lightweight - Easy to install

Considerations: - Shorter lifespan - Less UV resistant - Becomes brittle in cold

Rigid shells in set shapes and sizes.

Advantages: - Easy installation - Consistent depth and shape - Good for small water features

Considerations: - Limited sizes and shapes - Visible edges can be hard to hide - Difficult to customize

Always use protective underlayment beneath your liner:

For koi ponds and water features, we use 45 mil EPDM with quality underlayment. The slight additional cost provides decades of reliable performance.

Freedom Pondscapes uses premium liners in every pond we build.