Shingles can be blown off your roof during storms with high-speed winds, such as hurricanes. You'll usually find them scattered throughout your yard and the bare spots will be noticeable from ground level.
If you look at your ceiling inside your home and you notice water damage in the form of brown or yellowed stains, or have watched your ceiling drip water, it's definitely time to call a roofing contractor.
Signs of Age & Wear
When you look at your roof and see overgrown moss or faded, stained, deformed or crumbling shingles, it may be time for a roof replacement. A typical asphalt roof will last between 15 and 30 years.