A waterproofing membrane is a thin layer of watertight material, that is laid over the surface that needs to waterproofed. This layer is continuous & does not allow water seepage. These membranes could be laid on roof of any shape or terrace without breaking. These membranes are designed considering various factors such as structural movement, tear resistance, flexibility, strength, elasticity & UV resistance. These are very cost effective & time saving as they eliminate all the civil work. These membrane s are broadly classified as Sheet based membrane available in roll form & liquid applied membrane.