Waterproofing is the process of making an object or structure waterproof or water-resistant, so that it remains relatively unaffected by water or resisting the ingress of water under specified conditions. Waterproofing is the process which we use for external areas such as roofs, planter boxes, podiums, balconies and retaining walls just to name a few. Waterproofing is a combination of materials and methods used to prevent water intrusion into structural elements of building or finished spaces. As we have seen 90% of water intrusion occurs at critical junctions, such as seams between one façade system and another.