There’s a difference between a damaged roof and an aged roof. Common roof damage can be the result of a hail occurrence, strong winds, tree branches rubbing against the shingles, etc. An aged roof is simply when the shingles have reached the end of their normal life expectancy. Shingle Life Expectancy Typically, standard 3-tab shingle roofs have an average life expectancy of 15+/- years, while architectural grade shingle roofs have an average life expectancy of …