When to Replace Roof Shingles10 Warning Signs to Watch For
Don't wait for a leak to discover your roof needs attention. Learn to recognize these warning signs before costly damage occurs.
How Long Do Roof Shingles Last?
Note: Coastal climates, harsh weather, and poor ventilation can reduce lifespan by 20-30%.
10 Warning Signs Your Shingles Need Replacement
Age Over 20 Years
If your roof is approaching or past 20 years old, it's likely nearing the end of its effective lifespan. Even if it looks okay from the ground, underlying deterioration may be occurring.
Action: Schedule a professional inspection if your roof is 15+ years old.
Curling or Buckling Shingles
Shingles that curl at the edges or buckle in the middle have lost their ability to shed water effectively. This is caused by heat, moisture, or aging adhesive strips.
Action: Curled shingles cannot be repaired—replacement is necessary.
Missing Shingles
Visible gaps where shingles have blown off expose your roof deck to water damage. If you're finding shingles in your yard after storms, your roof is failing.
Action: A few missing shingles may be replaced; widespread loss requires full replacement.
Granules in Gutters
Finding excessive black or colored granules in your gutters or downspout discharge areas indicates shingle deterioration. Granules protect against UV damage—without them, shingles age rapidly.
Action: Some granule loss is normal on new roofs; excessive loss on older roofs signals replacement time.
Cracked or Split Shingles
Shingles with visible cracks or splits have been damaged by wind, temperature cycling, or age. Cracked shingles allow water penetration.
Action: Isolated cracks can be repaired; widespread cracking indicates roof-wide failure.
Bald Spots (No Granules)
Areas where the black asphalt base is visible have lost their protective granule coating. These spots are vulnerable to UV damage and will deteriorate quickly.
Action: Bald spots indicate significant wear—replacement is recommended.
Daylight Through Roof Boards
If you can see daylight through your roof boards when in the attic, your roof has serious structural issues. This usually indicates rotted decking or failed shingles.
Action: Immediate professional inspection needed—this is a serious issue.
Sagging Roof Deck
A sagging roofline visible from the ground or a bouncy feeling when walking on the roof indicates structural damage from moisture intrusion. The decking has been compromised.
Action: Do not delay—sagging indicates serious damage requiring immediate attention.
Water Stains on Ceilings
Brown water stains or bubbling paint on interior ceilings are clear evidence of roof leaks. Even small stains indicate water is penetrating your roof system.
Action: Find the leak source promptly—water damage spreads quickly.
Increasing Energy Bills
Sudden increases in heating or cooling costs may indicate poor roof ventilation or compromised insulation due to moisture from failing shingles.
Action: Have your roof and attic ventilation inspected to identify the cause.
Repair vs. Replace: Decision Guide
✓ Repair May Be Sufficient When:
- ✓Roof is less than 10-15 years old
- ✓Damage is isolated to one area
- ✓Less than 30% of shingles affected
- ✓No structural or deck damage
- ✓Matching shingles are available
✗ Replacement is Recommended When:
- ✗Roof is 20+ years old
- ✗Damage is widespread across the roof
- ✗Multiple leaks have occurred
- ✗Decking shows signs of rot
- ✗You're planning to sell your home
Not Sure If Your Shingles Need Replacing?
Get a free professional inspection from a GAF Master Elite certified contractor. We'll provide honest recommendations with no pressure.