Capillary barrier
Every pond needs a so-called capillary barrier at its edge . It is designed to prevent water loss through capillary action.
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If the surrounding soil had contact with the bottom area of the pond, the capillary action of the soil would practically suck the water out of the pond. Inside the pond, this is prevented by the pond liner, but at the edge of the pond both layers meet.
For this reason, the pond liner must always be brought to the top of the soil and fastened there. Otherwise the capillary action of the soil would pull the water out of the upper edge of the pond. A sign that something like this is happening are usually swampy areas around the pond. To prevent the liner from sliding down, you have to attach the pond liner to the edge.
Shore mats
Shore mats can be used to hide the raised pond liner. These are mats that consist of fiber and many pores. They allow for a good hold for bank plants.
Depending on how the pond bank is designed, the shore mat is laid:
1. In a so-called bank terrace, 10 cm below the water surface, the bank mat is placed there and pulled over the pond liner over the edge of the embankment. While the pond liner still extends into the bank ditch and is attached to its end, the bank mat already ends in the ditch edge leading downwards.
2. In the case of steep pond banks without a bank terrace, the bank mat is pulled up over the steep bank and attached to the upper edge of the pond together with the pond liner. The pond liner is then continued and fastened separately (ideally clamped between two stones or two squared timbers)
The pond liner must be pulled up and fixed on a side wall on the bank. This is the case, for example, with:
- Palisade walls
- Stone walls
- Walls made of wooden stakes
If such walls form a bank boundary, a strip can also be screwed onto the wall, under which the pond liner is attached. It is then folded over the bar again from above. The slope mat is then placed over it and conceals both the foil and the strip.
Tips
Pay enough attention to the border design - it is extremely important. If you plan your pond yourself, it is best to talk to a specialist about your planned border design in order to avoid problems later.
