We recommend that all impermeable liners have welded seams around attenuation systems. Stormwater Management employ T.W.I certified operators to install both the liner system and Flowblock units. This gives the client confidence that the system will perform as intended throughout the expected lifespan of the development.
Correct membrane specification is also vital to the integrity of the attenuation tank. Membrane thickness, tensile strength, water transmissivity and compatibility with site specific ground conditions are all important factors to take into account.
For the correct specification of the required impermeable membrane, please contact our technical department.