Geotextile Protective Underlay


Recommended for all pond liner installations. Orders must be a minimum of 2 meters in width.

m2 * £2.05


SKU: GPUPL Categories: ,


Pond underlay price per square m : £2.05 (£1.85 excl. VAT).

Orders must be minimum 2 meters in width.

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Pond Liner Guarantee

Pond Liner size calculator

Geotextile 250gm grey protective pond underlay is a mechanically bonded polypropylene needle punched material. This is a high performing, tough underlay relative to some brands available on the market.

Geotextile is used to protect your pond liner from being punctured by sharp stones, rocks, roots and other soil debris. This protective underlay also acts as an escape route for any gasses that may build up under a pond liner.

When garden pond liners are covered with soil, gravel, rocks or concrete, Geotextile protective underlay should be used both above and below the pond liner to prevent costly and time consuming repairs. Protective matting is recommended for all pond liner installations. Liners Online guarantee all our pond liners when used with this protective liner. Geotextile is supplied in rolls of 2 metre widths

Features of Geotextile pond underlay:

  • Remains unaffected by extreme weather conditions
  • Rot resistant
  • Easy to install
  • Helps prevent holes and leaks in pond liner
  • Environmentally safe
  • Provides the first line of defence against punctures and tears to a pond liner

Customers should follow this calculation to order the correct dimension for your pond. The 0.15m overlap or overlay is the minimal amount and a guide depending on the type of edging you have planned:

  • Maximum pond length + (2 x depth) +2 x 0.15m overlap = Total Length of Liner
  • Maximum pond width + (2 x depth) + 2 x 0.15m overlap = Total Width of Liner

Multiplying the depth by 2 accounts for the depth on both sides of the pond. And, the same applies to the overlay. Planting shelves in your pond design don’t need to be accounted for as they won’t significantly affect the pond measurements.

Building a garden pond and installing a bottom drain or fountain pump? Save on postage by adding waterproof sealant to your pond liner and pond underlay order.

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