Systems & Lifespan
How Long Does a Roof Last? Lifespan by Material
Roof lifespan is the single largest variable in a home's long-term cost profile. The spread between a 20-year asphalt roof and a 100-year slate roof is a six-figure decision over the life of a property.
Lifespan by material
Assume the lower end of each range in high-sun, high-wind, or freeze-thaw climates.
- 3-tab asphalt shingle: 15–20 years
- Architectural shingle: 25–30 years
- Wood shake: 25–35 years
- Standing seam metal: 40–70 years
- Clay or concrete tile: 50–100 years
- Natural slate: 75–150 years
What shortens roof life
Ventilation is the most underrated factor. An under-ventilated attic can cut asphalt shingle life nearly in half by cooking the shingles from below.
- Poor attic ventilation and trapped heat
- Clogged gutters holding water at the eaves
- Overhanging branches and biological growth
- Layered roofs installed over old material
- Improper flashing at valleys, chimneys, and skylights
Five signs replacement is close
Any two of these together justify a professional evaluation this season.
- Granules collecting in gutters
- Curling, cupping, or missing shingles
- Daylight or staining visible in the attic
- Sagging along the ridge or between rafters
- Repeated repairs in the same area
Repair or replace
A useful rule: if the roof is past 75 percent of its expected life and the repair exceeds 25 percent of replacement cost, replace it. Insurers increasingly price policies on roof age, so an aging roof costs money even when it is not leaking.
Frequently asked questions
How long does an asphalt shingle roof last?
Typically 15–20 years for 3-tab and 25–30 years for architectural shingle, with ventilation and climate shifting results by several years in either direction.
Does roof age affect home insurance?
Yes. Many carriers reduce coverage, require actual-cash-value settlement, or decline renewal once a roof passes 15–20 years.