Pond Liners
The following is a typical specification for the Liquid Rubber Vezlar™ spray applied membrane when applied as a continuous seamless liner for earthen ponds, lakes and reservoirs. Each project will have special conditions and these should be identified and addressed in addition to this specification. If in doubt, seek the advice of a Liquid Rubber technical advisor before proceeding.
Prior to beginning, a thorough inspection of the substrate should be carried out to determine or confirm the nature of the soil, drainage, water table level, presence of any natural or man-made objects that could potentially damage the liner. Liquid Rubber liner systems should be installed on smooth sand, clay or concrete binding, free of sharps and undulations, as well as free of weeds and other vegetation The site engineer should always be consulted when designing the liner system.
At the perimeter of the pond or containment basin it is recommended to terminate into a trench for support of the sides of the liner. This serves as secondary and final fixing points of the perimeter of the membrane, and its use is recommended even when no anchoring requirements are specified. This trench should be a minimum of 200 mm. wide and 200 mm. deep. The perimeter ends are terminated by making at least 2 complete turns of the geo-textile around a one-inch PVC pipe. Place pipe in bottom of trench and back fill.
A soil ‘sterilant’ sprayed onto
soil sub-base prior to the installation of a geo-textile will prevent
any unwanted vegetation growth that could damage the finished membrane.
Roll out the geo-textile on the sub-base, overlapping the seams to
a minimum of 100 mm. Ensure the geo-textile is tight at all inside
corners. Using galvanized pins secure geo-textile on at 2 m. grid
pattern. Apply Voxlar™ within the seams to a minimum thickness
of 1 mm. to seal the overlap and around all pins.
Liquid Rubber Vezlar™ should be applied at a thickness of between
2 mm to 3 mm after all the detailing work and seaming has been completed.
Detailing and sealing penetrations requires application of Voxlar™
to a thickening of 1 mm. When applying Vezlar™, begin spraying
from the lowest point to the highest in slow even strokes.
If the water table is above the low point of the pond or basin, the geo-textile liner should be sprayed with Vezlar™ to the prescribed thickness outside of the pond and allowed to cure. Once cured, the membrane is placed in the bottom of the pond or basin and the overlapping joints are sealed with Voxlar™. This ensures that the waterproofing membrane cures properly and is not adversely affected by any standing water in the bottom of the pond.
The membrane should be checked for correct
thickness using a grid pattern with sections not greater than 10m².
The liner system should be allowed to cure, free of any water for
48 hours before being put into use. The Vezlar™ spray applied
seamless waterproofing membrane may be applied to most synthetic liners
and geo-textiles, however it is not recommended with EPDM type liners.
Liquid Rubber products meet waterproofing industry standards, including
the Australian Standard 4858 ‘Wet Area Membrane’ and meet
ASTM D1434-82 gas permeability, ASTM E2178 air permeance, ASTM E154
biological resistance, and CGSB37-GP-56 puncture resistance and water
tightness standards.
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