In building construction, a structure needs waterproofing since concrete itself will not be watertight on its own (but not concrete is easily waterproofed with additives). The conventional system of waterproofing involves ‘members’. This relies on the application of one or more layers of membrane (available in various materials: e.g. bitumen, silicate, PVC, EPDM etc.) that act as a barrier between the water and the building structure, preventing the passage of water. However, the membrane system relies on exacting application or adherence to the substrate can lead to leakage. Parapet wall top are mostly ignored which are the initial factor causing.