Here are some tactics to waterproof your balcony the right way: Choose the right sealant for balcony material Complete all-penetrative work before waterproofing your balcony – check all lines, grouts, to see if water is leaking or not Make sure all the penetrative materials are sealed and again resealed to be extra sure A good drainage system is required so water doesn’t accumulate in the balcony If the balcony flooring is wood then we suggest you buy tarp to cover the floor of your balcony The water must be channeled correctly and must be directed such so that the water does not seep into the surface.