Ponds / water features
The use of Drybase cementitious waterproofing products is often associated with civil engineering applications such as reservoir waterproofing. They also provide a cost-effective waterproofing solution for ponds and water features.
First, a fillet is formed around the inside perimeter of the pond using Drybase Universal Mortar. Once the Universal Mortar has cured, two coats of Drybase Tanking Slurry are applied to the sides and floor of the pond.
If a tiled finish is required, a 3:1 sand: cement render should be applied over the second coat of Drybase Tanking Slurry whilst it is still green. This will provide a suitable base for tiles to be fixed using a suitable waterproof tile grout.
Where fish are to be kept in the pond, it is important to take precautions to ensure that the water quality is suitable for the species of fish to be kept. To this end, advice should be sought from the fish supplier.
In common with all cementitious coatings, Drybase Universal Mortar and Drybase Tanking Slurry will cause the water in the pond to have a high pH (typically between 12 and 13) when first filled. To bring the pH down to a more neutral level, the pond will have to be emptied and filled several times until the correct pH is reached.
Preferably, pipe inlets will be formed in situ during the casting of the concrete and sealed using Drybase Water Bar expanding waterstop. This replaces Expaseal B Plus.
Where it is necessary to install pipes after the casting of the concrete, these can be sealed using Vandex Uniflex.
Other Types of Pond Construction
Details of other types of water-retaining structures that can be waterproofed using Vandex products can be found on our water-retaining structures page.