Does your house have the middle age blues? Flickering lights, rusty water, mysterious dripping, creeping cracks, leaky roofs, drafty windows, sagging floors and a crumbling chimney are some of the signs. If you notice these symptoms of aging, it’s time to give your house a dose of preventive medicine. Akin to people, who begin aging at birth, houses start to age right after the last coat of paint is put on. Although not immediately apparent, the natural forces of gravity, …