When the exteriors of the house are exposed to rainwater and humidity, water and moisture will travel through the masonry and affect the internal walls. This means the walls will stay damp for long, leading to mold growth or worse, irreparable damage to the structure.
Typically, the external wall is built with masonry to fill spaces in the concrete frame containing slabs, beams, and columns. The plaster in them often develops cracks, allowing for seepage of rainwater from the external to the internal wall. Cracks in plaster can lead to water seepage in the exterior foundation wall as well. It is therefore necessary to have high-performance waterproof coating that covers the surface and bridges the cracks to prevent seepage of water from the external wall to the interiors of the building.