Shingled roofs are built to survive at least until the guarantee term expires, and maybe for a few years beyond. Shingles of varying grades will stay longer or shorter. Some shingles are designed to survive for up to 30 years. As shingles deteriorate, they shed their protective granules, which end up in the gutters. Cleaning up the gutters can assist to gauge how much of the granules have worn from the shingles and provide a decent estimate of how quickly the roof is degrading. Replacing a building’s roof before it begins to leak water might save money on fixing water damage in addition to replacing the roof.