INSUWRAP PVC 1200 TNL

Apply (PVC 1200 TNL) membranes loose laid for horizontal areas with 50 mm overlap by using hot air welding technique. Horizontal PVC membranes shall be installed to 300 mm height on the vertical walls to enable the welder to join the horizontal membranes at the corners properly with the followed vertical PVC membrane. Apply horizontally protection layer nonwoven polyester (140g/m2) with 100 mm overlap over the entire horizontal PVC membrane or as required. Cover sheets with permanent overlying construction as soon as possible. This can be done by applying a minimum 50 mm thick concrete protection layer. Lay steel reinforcement and concrete as specified.

Apply (PVC 1200 TNL) membrane vertically by mechanical fixing using PVC coated galvanized metal strips (50 mm width) fixed horizontally to the walls by fasteners and receiving PVC membrane by using hot air welding technique over the strips. PVC rolls should be joined vertically with 50 mm overlaps using hot air welding technique. For pipes, ducts, cables, and other penetrations through the sheets, ensure complete watertightness by using pre-formed collars fully bonded/sealed to both pipes and sheets. Dressing can be made at site using the same PVC liner. Cover external walls of tanking system with at-least (10 mm thick) fiberboards. Provide a temporary support or contact adhesive to ensure full contact of boards to tanking system during back filling operation.