Typical lifespans
| Material | Typical life |
|---|---|
| 3-tab asphalt | 15–20 years |
| Architectural asphalt | 20–30 years |
| Standing-seam metal | 40–70 years |
| Cedar shake | 20–30 years |
| Natural slate | 75+ years |
These are common industry ranges. Local conditions and workmanship change them.
What shortens a roof's life here
Poor attic ventilation
Hot, damp attics cook shingles from below. In summer, heat builds. In winter, moisture condenses on the deck. Balanced vents fix both problems. See our Michigan roofing code guide.
Freeze and thaw
Water gets into tiny cracks, freezes, and expands. Over many winters, shingles crack and flashing loosens.
Ice dams
Repeated ice dams soak the deck and rot the edge boards. Read our ice dam guide.
Wind and storms
April 2026 storms in West Michigan hit 60 to 75 mph. Poor nailing or old sealing strips fail first.
Shade and trees
Shaded slopes stay damp. Moss and algae grow and hold water against shingles.
Installation quality
High nails, missing flashing, and short ice barrier cut life by years. A good crew following the maker's instructions protects the warranty and the roof.
Signs your roof is near the end
- Shingles curl, crack, or lose granules.
- Bald spots show the dark mat below.
- Granules collect in gutters and downspouts.
- Daylight shows through attic boards.
- Ceiling stains grow after rain or melt.
- The roof sags between rafters.
- Moss spreads on several slopes.
How to get the most from a new roof
- Choose a roof system with ice barrier, quality underlayment, and new flashing.
- Improve attic ventilation and insulation.
- Clean gutters twice a year.
- Trim branches that touch the roof.
- Check the roof after major storms.
- Keep the permit, invoice, and warranty papers.
Warranty years are not roof years
A "30-year" shingle does not promise 30 dry years. Warranties often prorate after a set period, and they exclude poor installation, bad ventilation, and storm damage. Read the fine print. Ask your roofer to explain what the maker covers and what the crew covers.
Repair or replace?
Use these rules of thumb.
- Repair if damage is small, the roof is under about 15 years old, and shingles still lie flat.
- Replace if damage spreads across several slopes, shingles curl or crack, or leaks return after patches.
- Replace if the roof is near the end of its range and the deck feels soft in spots.
Repairs on an old roof can cost more over time than one new roof. An inspection gives you a clear answer.
Match the material to your timeline
If you plan to sell in five to ten years, architectural asphalt shingles give strong value. If you plan to stay 25 years or more, metal may cost less per year of life. Owners of historic homes may prefer cedar or slate for their look and longevity.
Is it time to replace?
If your roof is near the lifespan range and shows several signs above, plan a replacement. Start with the cost guide so you know the numbers. Then compare materials on our asphalt and metal pages.
Book an inspection and we will check the roof, the deck, and the attic.