Why do foundations need waterproofing? Ingress of water into a building can cause a lot of damage. Ingress of water into the foundation and underground structures, like basement, causes rotting, corrosion of steel, damage to concrete. In other words, it reduces house’s lifespan and compromises its functionality and usability. Therefore, waterproofing is indispensable and reliable protection against water. Balconies, terraces, flat roofs, the point where the house and ground meet, and the foundation must be protected with a layer of polyurethane or bitumen. Waterproofing also provides protection against the elements, such as frost, snow, hail, heat, and anything that can cause building materials to shrink or expand. There are different ways to waterproof a basement, including foil, a bitumen waterproofing membrane, membrane, bitumen, sealing of joints, coatings, waterproof mortar, etc.. Waterproofing mortars are also used for other construction works, e.g. protection of floors prior to laying flooring, balconies, terraces, or swimming pools. Check out other advice we’ve prepared, and use our calculator to see the cost of waterproofing. You can also always contact our experts, who’ll be more than happy to reply.