How much ballast is needed over exposed liners?
The ballast system should be designed to secure the liner in place under the maximum anticipated wind suction pressures for the specific project site. Wind uplift pressures can be as high as 30 psf depending on the project site geometry and wind velocity. Please call your Poly-Flex sales representative for more information. • Can construction equipment be operated directly on the liner? Equipment that applies less than 2 psi ground pressure can be operated directly on the liner when operated with caution, including no sudden starts, stops or turns. • What maintenance is required for Poly-Flex liners after installation? None, Poly-Flex liners are maintenance free.
