Liners & Underlay

An essential part of any pond construction is laying the right foundations. Using a solid and reliable pond liner stops water from leaking out of the pond and into any soil. For pond liners to work correctly, it’s a good idea to use a pond underlay first. Pond underlay will offer an extra layer of protection when building a pond and give your water feature the right start so it lasts for many years. 

Pond underlay helps to protect the pond lining from pieces of debris or rock that may be in the soil when you dig out a pond. It’s common to find that as you’re building a pond, the further you go into the earth, the harder the ground can be. This is where potentially damaging stones or rough corners may be, which can penetrate your pond lining and lead to leaks. A good pond underlay is an impermeable sheet, usually made from polyester or polypropylene. These manmade materials do not rot easily, which is why they make an excellent pond underlay to sit beneath your pond liner. 

There are many elements to consider with pond construction. Getting the pond underlay in place and topping with a robust pond liner is one of the first things to take care of. After this, you can consider the other essential pieces of pond equipment, such as pond heaters and pond air pumps. If you have successfully finished building a pond then you can find advice on caring for your pond in winter or summer, or take a look at our pond accessories to make the most of your new water feature.

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  1. HDPE Pond Liner & Underlay Combo (Various Sizes)
    HDPE Pond Liner & Underlay Combo (Various Sizes)
    Out of stock

    Finest-Filters Quality HDPE Pond Liner complete with underlay. In stock in our UK warehouse ready for immediate shipping!

    This is a fantastic quality liner, fully UV and tear resistant and guaranteed for 25 years when correctly installed.

    Our liners are available in many different sizes – please select the size required from the drop down menu when ordering. Please Note: underlay may be supplied in two pieces for some of the larger sizes, but liner is always supplied as one piece.

    Our underlay is one of the thickest and best quality on the market which is manufactured to ensure optimal protection to your liner. Our underlay is 140 grams per square meter.

    We also have the larger sizes of liner available for collection from our store. Please contact us here for more information.

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