How long a roof will last is dependent on several controllable factors. The lifespan of a house-top can be extended or reduced depending on the way it is maintained by the homeowner; however, it is a fact that no matter how well it is cared for, at some point the material will deteriorate and risk structure failure. Common signs of structural roof problems include: the presence of granulation; broken shingles; and slipping or cracked shingles. All of this if not detected at an early stage could allow water to penetrate the structure and cause severe damage and premature failure of…