DuraLiner™ – Pond Liner Underlayment - Custom Cut

custom cut pond liner underlayment is a practical way to help protect your pond liner from punctures and tears while improving the stability of the ground beneath it. Designed as a geotextile fabric layer, this underlayment cushions the liner from sharp stones, roots, and other debris that can compromise an installation over time. Because it’s custom cut, you can order the coverage you need without paying for excessive material, making planning and layout more efficient on jobs of any size.

Use custom cut pond liner underlayment below the liner to create a more forgiving base that supports the liner and helps reduce point-load stress. It can also be placed above the liner before adding gravel or rock, helping reduce the risk of damage during placement and future maintenance.

Key advantages

• Added liner protection: Helps guard against punctures, abrasions, and tears from roots, stones, and irregular subgrade.
• Improved base stability: Supports soil stability and can contribute to erosion control in and around the excavation.
• Flexible installation: Suitable for use underneath or on top of many common pond liner types.
• Custom-fit planning: Ordering a custom cut pond liner underlayment makes it easier to match coverage to your pond shape, shelves, and edges.

Where to use it

• Under the liner: On compacted soil or sand to help cushion and protect the liner.
• Over the liner: Before adding gravel/rock in streams, bogs, or decorative zones where impact and abrasion risk is higher.

Installation tips

• Remove sharp debris and smooth the subgrade before laying underlayment.
• Overlap seams as needed for continuous coverage, especially on shelves and transitions.
• When placing stone on top, set material carefully to avoid shifting and point loading.

FAQ

Can I use custom cut pond liner underlayment with EPDM? Yes, it’s commonly paired with EPDM and other pond liners as a protective layer.

Do I need it if my soil is soft? Even in softer soils, underlayment can help protect against hidden rocks, roots, and future settling.