During the rainy season, a leaking roof of an old house becomes a serious problem. Seepage from rainwater can reach the walls, causing dampness both on the roof and on the walls of the entire house. The only solution to this major problem is roof waterproofing.
There are several methods for roof waterproofing, some of which are more expensive, while others are more budget-friendly.
Overall, the standard cost of roof waterproofing ranges from 40 to 180 rupees per square foot. If the roof area is 1000 square feet, the total cost can be approximately from 40,000 to 180,000.
The cost of waterproofing depends on the quality of the materials used and the applied process.
One of the most common methods is applying a liquid polymer coating. The cost of this process is from 40 to 70 rupees per square foot. It involves applying three layers: crack filler, fiberglass mesh, and waterproof liquid coating. This method is effective for eliminating small cracks and minor dampness on roofs.
Another option is membrane waterproofing. This method is more costly but suitable if there are many cracks and severe dampness on the roof. Its cost is 100–180 rupees per square foot. In this process, a special sheet of plastic or bitumen is heated with a gas torch and glued to the roof. This approach is considered very durable and permanent, and it is considered the most effective in areas with heavy rainfall.
Another waterproofing method is cementitious waterproofing. This is the cheapest and most popular process. The roof is made waterproof by applying a single layer of mortar made from white cement, Fevicol, or a mixture of cement and polymer with a brush. This method is the most economical and accessible.
