Flat roofs are commonly the type of roofs that suffer mostly from leaks,due to old felt roof coatings having been applied. Nowadays they are many new types of flat roof coatings on the market, many are mastic roof coatings, or resin based roof coatings.These type of coatings take into account the uneveness of flat roofs and are self leveling products, They can be hot or cold applied depending on the exsiting roofing.