10 Ways to Know Your Home’s Roof Might Need Replacing

Shingles are curled or cupping.
Shingle granules are missing and the asphalt substrate is showing through.
Excessive granules spill from your downspouts after a rainstorm. This applies only to older roofs. A newly installed roof will release some granules that will accumulate for a short time; this is caused simply by the manufacturing.
Shingles are cracked or missing.
Your roof is 20 years of age or older.
The roof is leaking. Leaks can often be repaired, but on an older roof they may signal the need to replace it. If your roof is leaking, address the issue as soon as you can. Plywood and framing can rot, which can lead to both mold growth and insulation & drywall damage that will cost more to repair if you wait.
Moss appears on roof surfaces. Moss can hold moisture against shingles and quicken granule loss.
Your home is not properly vented. Is your attic too hot? Can you see mold or streaking under the plywood or the framing? These signs indicate insufficient home ventilation that will shorten the life of your roof.
Your neighbors are getting new roofs. Many homes in subdivisions are built around the same time and subjected to the same weather conditions.
Your roof just looks old and worn.