The short version
- InterNACHI estimates about 20 years for 3-tab shingles, about 30 for architectural, and 40 to 80 for metal.
- Ohio's freeze-thaw cycles, ice dams, heat and storms all shorten a roof's life.
- Curling shingles, granule loss and repeat leaks are signs it's time.
- Clean gutters, good ventilation and post-storm checks help a roof last.
Typical lifespans
InterNACHI, the home inspectors' association, estimates these lifespans:
| Roof type | Estimated life |
|---|---|
| 3-tab asphalt shingles | About 20 years |
| Architectural asphalt shingles | About 30 years |
| Metal roofing | 40 to 80 years |
Those are estimates for roofs that were installed well and maintained. Real life depends on weather, ventilation, installation and upkeep.
What Ohio weather does to a roof
- Freeze and thaw. Water that gets under shingles freezes, expands and works them loose over many winters.
- Ice dams. Heat escaping into the attic melts snow, which refreezes at the cold eaves and backs water up under the shingles. Ice and water shield along the eaves and good attic ventilation help prevent this.
- Summer heat. Hot attics bake shingles from below, which is why ventilation matters so much.
- Hail and wind. Spring and summer storms bruise shingles and break their seals, shortening their life even when nothing looks wrong.
- Trees. Shade holds moisture on the roof, and falling limbs and clogged gutters add damage.
Signs it's time to replace
- Curling, cupping or cracked shingles
- Bare spots and granules collecting in the gutters
- Missing shingles after ordinary storms
- Leaks or water stains that keep coming back
- Daylight through the roof boards in the attic, or soft, sagging spots
- A roof that's 20 or more years old, especially with 3-tab shingles
How to make your roof last longer
- Keep gutters clean so water drains off the roof edge
- Make sure the attic is properly ventilated
- Have the roof checked after major hail or wind storms
- Fix small problems, like a cracked pipe boot or lifted shingle, before they become leaks
- Trim branches back from the roof
Repair or replace?
If your roof is in good shape overall and the problem is in one spot, a repair usually makes sense. If it's past 20 years, has problems in several places, or keeps needing repairs, replacement usually costs less over time. Roof repair · Roof replacement.