Application
Box Welded Garden Pond Liners
The cleanest finish available for a garden pond. Made to your dimensions — no folding, no creasing, no compromises.
Why choose a box welded liner for your garden pond?
A professional finish from day one
No visible folds or creases at the waterline. A box-welded liner looks clean and intentional — the liner disappears and the water takes centre stage.
Works for any garden pond shape
Square, rectangular, circular, L-shaped or stepped — we manufacture to your exact dimensions, whatever the shape.
Faster installation
A box-welded liner drops straight in. No wrestling with excess material or improvised folding. For a contractor, that time saving adds up quickly.
The right choice for formal garden ponds
A garden pond is often the centrepiece of an outdoor space — and a liner with visible folds at the corners undermines the finished result. Box welding produces a liner that fits the excavation exactly, so the walls are flat and the base is clean. The water surface reflects clearly, the planting shelves sit at the intended depth, and the whole feature looks intentional from the day it fills.
Comparing the cost to flat sheet
A box-welded garden pond liner costs more upfront than a flat sheet equivalent. The difference is typically modest — and the installation is considerably faster, because there is no folding, trimming or improvisation required. For a contractor, that time saving offsets most or all of the price difference. For a homeowner doing the work themselves, the simpler installation means fewer mistakes. A small square garden pond liner starts from approximately £220 — use our quote form for a price based on your exact dimensions.
What shapes work best
Box welding is most effective for ponds with defined, consistent geometry — straight walls, a flat base, consistent depth throughout. The most common garden pond shapes are square and rectangular, which we can manufacture quickly and economically. L-shaped, circular and stepped designs are all available. For genuinely informal, freeform shapes, a flat sheet liner is usually more practical — and we will tell you that honestly if it applies to your project.
See our measuring guide for help with taking the right dimensions, and our cost guide for a detailed explanation of what affects the price.
Shapes we manufacture
What to measure
Measure the internal dimensions of your pond excavation:
- Length (m)
- Width (m)
- Depth (m) — maximum depth
- Lip allowance — how much liner overhangs the edge
Frequently asked questions
Use our online calculator for square and rectangular ponds. For other shapes, send us your dimensions and we will calculate the liner size and send a drawing.
Box welding works best for ponds with defined geometry — straight walls, consistent depths. For truly freeform shapes, a flat sheet liner is often more practical. Call us to discuss your specific design.
Our standard lead time is 5–10 working days from drawing approval. We also offer an express service for most shapes — ask when you request your quote.
A flat sheet liner is a single piece of material that you fold and pleat into the pond shape on site. A box welded liner is pre-cut and welded to the exact dimensions of your pond before delivery — it drops straight in with no folding required. The result is a cleaner finish with flat walls and no creased corners.
A small square or rectangular box welded garden pond liner starts from approximately £220. The price depends on size, shape complexity and material thickness. Use our quote form for an exact price based on your dimensions.
Our 0.75mm standard grade is suitable for most domestic garden ponds. The 1.0mm heavy duty grade is recommended for larger ponds or where additional robustness is valued. Both carry a 25-year guarantee.
Ready to get a quote?
Send us your dimensions — we'll reply with a price and a technical drawing the same working day.