Several questions need to be answered when determining the approximate lifespan of a roof that has been correctly installed. To start, one must examine the type of a roof. Whether the roof is sloped or flat, it has two basic elements: the roof deck and the wood planks, plywood, or oriented strand board, otherwise known as particle board. These elements are usually used in residential construction and have a weather-resistance or waterproof finish. A sloped roof can be finished with asphalt composite shingles, wood shingles/shakes, clay tiles, metal, or slate tiles. A flat roof's membrane typically includes several layers or plies of felt with a coat of tar between each ply.
Different types of roofs
The surface of the roof…