The APP bitumen membrane, short for Atactic Polypropylene Membrane, is a special waterproofing material that is manufactured from Bitumen. They comes in rolls. Each roll measures 10 metres by 1 metre and covers an area of 8.7 m². With proper workmanship, the APP membrane is a very efficient and durable waterproofing material used in most constructions.
APP membrane can be applied for fresh roof slab, sunken slab, balconies, and basement.
APP Membranes applied as follows
- Clean entries surface
- Apply primer
- Once the primer is completely dry, heat an stick APP membrane on the surface. Must provide an overlap of 10cm on both side.
APP membranes are not UV resistant. So a protective plastering or screading is must over the treated surface. Unless it is protected, membranes may de-bond from surface and water may enter in to sheet. This will cause the entire application get damaged