Box Welded Pond Liner

Box welded pond liner is tailored to fit vertically sided earth, brick or concrete formal shaped ponds (rectangles, circles or “L“ shapes). Formal ponds with planting shelves, sloping bases, uneven depths or a haunched base to fit a bottom drain to Koi ponds, can all be accommodated.

The advantage to installing a box welded pond liner versus a flat sheet liner is that they eliminate folds and unsightly creases. Ponds where there are folds to the pond liner have the potential for harbouring debris. This can then lead to the growth of unwanted pathogens and as a result, adversely affect the quality of water threatening the health of fish.

Made to bespoke dimensions

When a box welded pond liner is ordered it will be prefabricated to bespoke requirements. We use either 0.75mm or 1.0mm Butyl pond liner membranes. The guarantee is subject to installation above a protective underlay.

Box-welded liners are fabricated to fit the exact shape of a pond with an overlay lip. Flagstone or other edging material can be placed over the lip to secure the liner in place.

To assist us in providing you with the tailored-to-fit liner, we will need a drawing showing all the dimensions. Our service offers a bespoke liner cut and welded to the exact shape of your pond for a snug fit.

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How to order a box welded pond liner

If you are planning a complicated and irregular shaped pond it may be easier for you to provide a template of the base and send it to us. We can then cut out the shape and add in the walls. For very complicated ponds we can tailor make and install the tailored-to-fit pond liner on site using our 1.2mm Flagon Thermoplastic Polyolefin (TPO) liner.

For more information regarding onsite pond liner installations, you can view some of the work we have done in our Bespoke Projects section.

Tailored pond liner orders will be supplied with a lead time of 5-10 working days.

To place an order for a box welded pond liner, add in your details and requirements in an email and send it to us at or telephone us at +44 (0)1908 556053.