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Which Liner
and Underlay should you choose.
Whether your pond is a natural pond, home to a few Goldfish or has giant Koi it has to hold water, and in most ponds the water is kept in with a liner. The process of building a pond is not something too many people would cherish having to do twice. It is therefore important that the correct liner, and if need be underlay is chosen. If not then the pond will not be water tight and the whole project may need re-doing. You cannot predict every eventuality, but spending some time working out the risk and threats can save time and money later. The risks to liners come from above and below. From above they are predominantly from claws and accidents. The claws could be dogs, cats, ducks and herons. From below the risks are from stones, flint, rubble, underground pipe work and roots (existing and new systems). This is not a full list, but some of the most common problems we have come across. If you believe any of these maybe a problem then we would recommend using the stronger liners and underlay i.e. Greenseal, Butyl, Firestone, AquaPrem Lifetime liners each with 260g underlay. However, if you do not believe the liner is under any threat then consider the AquaPrem 15 or 30 with 180g underlay as an added precaution.
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