Typical roof lifespans by material
| Roof type | InterNACHI estimate[1] | NAHB study (2007)[3] |
|---|---|---|
| Asphalt shingles, 3-tab | 20 years | About 20 years (asphalt shingles) |
| Asphalt shingles, architectural | 30 years | |
| Metal | 40–80 years | Not listed |
| Slate | 60–150 years | Over 50 years |
| Wood shakes or shingles | 25 years | About 30 years (shakes) |
| Fiber cement | 25 years | About 25 years |
| EPDM rubber (flat) | 15–25 years | Not listed |
| TPO (flat) | 7–20 years | Not listed |
| Modified bitumen (flat) | 20 years | Not listed |
Both sources say a roof's life depends on local weather, design and installation, material quality and maintenance.[1][3] No published study gives Buffalo-specific lifespans.
What wears roofs out in Western New York
The National Weather Service describes Buffalo winters as cold and snowy but changeable, with frequent thaws and rain. Over half the annual snowfall comes from localized lake-effect bands, which hit areas south of Buffalo much harder than areas to the north.[2] Normal snowfall at the airport is 95.4 inches a year.[4]
That melt-and-refreeze cycle is what drives ice dams. Water backs up behind the ice, finds cracks and openings in the roof covering, and can soak insulation and ceilings and lead to mold.[5] Older, tightly spaced homes in Kenmore and Tonawanda often need ventilation and air-sealing work alongside a reroof.
Flat roofs on Western New York homes and businesses
Flat and low-slope membranes have shorter expected lives than pitched roofs: 15–25 years for EPDM, 7–20 for TPO and about 20 for modified bitumen, by InterNACHI's estimates.[1] Drainage and snow load matter most on flat roofs. See flat and commercial roofing.
How to get more years from your roof
- Stop attic heat loss. Air-seal the ceiling first, then add insulation, to prevent ice dams.[5]
- Use ice barrier underlayment at the eaves when you reroof. New York's Residential Code requires it where the local building department records a history of ice-dam damage.[6]
- Keep gutters working. Aluminum gutters are rated 20 to 40+ years.[1]
- Inspect after big storms and every spring, from the ground or with a pro. See signs you need a new roof after winter.
When age isn’t the only factor
A 20-year-old roof with one leak may only need a repair, and a newer roof with widespread storm damage may need replacement. Homeowners insurance covers sudden damage from covered causes, not wear.[7] Compare your options in roof repair vs. replacement, or browse roof replacement contractors.