10 Signs You Need a New Roof - and How to Be Sure
By Roofing Price Tool Editors · Updated · 6 min read
Catch roof failure before the leak. Ten specific warning signs from the ground (and from your attic) that mean it's time to replace, with what each one tells you.
The five-minute self-check
Stand across the street from your house at midday with binoculars (or your phone's zoom). Look up. Most of these signs are visible from there - you don't need to get on the roof.
1. Curled, cupping, or buckled shingles
Edges that lift up or corners that curl mean the shingle has lost its binder oils and is no longer water-tight. Scattered curling is common on south-facing slopes near end of life. Curling across the whole roof = replace within 12 months.
2. Bald patches and lost granules
Shingles look black, sparkly, or shiny where they used to look textured. Granules protect the asphalt mat from UV - once they're gone, the shingle has roughly 2 - 3 years left before it cracks open.
3. Granules pooling in your gutters or downspouts
Some granule loss happens early (those are loose ones). Heavy accumulation 10+ years in is the same signal as #2 from a different angle. Cup a handful from a downspout extension - if it's more sand than dirt, the roof is shedding.
4. Daylight visible in the attic
Climb to your attic on a sunny day with the lights off. Any pinholes of light through the decking mean there are matching holes in the roof above. Common around chimney flashing, vent boots, and skylights.
5. Sagging anywhere along the roof line
Eyeball the ridge line and the eaves from the street. A new roof should look like a perfectly straight line. Any sag suggests rotted decking or compromised rafters underneath. This is the only sign on this list that's a structural emergency, not just an end-of-life warning.
6. Heavy moss, algae, or lichen
Surface stains (the black streaks of gloeocapsa magma algae) are cosmetic and treatable. Three-dimensional moss with stems holding moisture against the shingle is a different problem - it's accelerating decay underneath.
7. Water stains on upstairs ceilings or walls
By the time water makes it through the decking, insulation, and drywall, the roof has been actively leaking for a while. One stain might be flashing or a vent boot. Multiple stains in different rooms = the roof itself.
8. Two leak repairs in the last three years
Repeated repairs are diminishing returns. A roof at end of life will fail in a new spot every season - patching becomes more expensive than replacement within a few years.
9. The roof is past its material's expected life
Find the original install date. If you're past 85% of expected lifespan (rough numbers: 17+ years for architectural asphalt, 13+ for 3-tab, 35+ for metal, 50+ for tile), start budgeting. The next bad winter or wind event will likely tip it over.
10. Your neighbors are replacing theirs
Houses built in the same year by the same builder usually got the same roof. If three houses on your block have new roofs in the last two years, yours is on the same clock.
How to verify before you commit
Get a written inspection from a contractor whose business is established, not a door-knocking "storm chaser" the week after a hail event. Insist on photos - a real inspector takes 30 - 50 of them. If the only thing they want is to start tearing off tomorrow, that's not an inspection, it's a sales pitch.
And before you call anyone, know roughly what a replacement should cost for your roof. Run the calculator in 2 minutes so you can read a quote without flinching.
Sources: InterNACHI roof inspection standards · NRCA