How often should you replace an asphalt shingle roof?
Updated July 2026
An asphalt shingle roof gets replaced roughly every 20 to 30 years, and the spread is mostly about which shingle you have: laminated architectural shingles run 25–30 years, while older 3-tab shingles are more like 15–20. Intense sun, a poorly ventilated attic that bakes the underside, and a single bad hail or wind storm can all cut those numbers short. The roof rarely dies all at once; it tells you it is nearing the end, and reading those signs beats waiting for a leak.
What changes the interval
| Your situation | Interval | Why |
|---|---|---|
| Architectural / laminated shingles | 25–30 years | Thicker two-layer construction resists wind and wear far better than 3-tab |
| 3-tab shingles | 15–20 years | The thinner budget shingle; common on older and spec homes |
| Hot, high-UV climate (Southwest, Deep South) | 15–25 years | Relentless sun bakes the asphalt brittle and burns off the protective granules |
| Poor attic ventilation | Knock off 3–5 years | Trapped heat cooks shingles from below and ages them prematurely |
| After major hail or wind | Inspect now, maybe replace early | Storm damage can total a mid-life roof; document it for insurance |
| Impact-resistant (Class 4) shingles | 25–30+ years | Built for hail country and can earn an insurance discount |
The cost of skipping it
What running it to failure costs: a planned tear-off and replacement runs $8,000–20,000+ depending on size, pitch, and shingle grade (roughly $4.50–7 a square foot installed). Push a worn roof one storm too far and the leak finds the decking first: soaked plywood delaminates and must be replaced sheet by sheet, insulation matts down, and water reaches ceilings and framing. Now you are paying for the roof plus deck replacement plus interior repair, and possibly mold. Replacing near the end of the expected life, on your schedule, is the whole game.
How to do it (Pro job · $8,000–20,000+ installed)
- Once a year, scan the roof from the ground with binoculars for curling, cupping, or lifted shingles.
- Check the gutters and splash zones for shingle granules; heavy granule loss means the shingles are wearing out.
- Look for bald dark patches, cracked shingles, and any missing tabs after a storm.
- Go into the attic and look for daylight, water stains, or sagging between rafters.
- Note the roof age from records or the last permit; near the interval, get a pro inspection before you have a leak.
- If replacing, budget a tear-off (not an overlay) so the roofer can inspect and repair the decking underneath.
Knowing the interval is the easy half. OnOtto reminds you at the right interval, and it won't let you snooze it into next year. Tasks persist until they're done, and completing roof replacements schedules the next one automatically.
Put this on autopilot, free for 30 daysFrequently asked questions
Can I put a second layer of shingles over the old roof?
Sometimes code allows one overlay of a second layer over existing shingles, and it saves on tear-off labor. But most roofers steer you to a full tear-off, and for good reasons: an overlay hides the decking so rot goes unseen, adds heat-trapping weight, does not last as long as shingles on a clean deck, and can complicate future repairs. The tear-off costs more up front (a few thousand more on an average home) and is almost always the better value over the roof's life.
What are the signs a roof needs replacing?
Widespread curling or cupping shingles, bald spots where the granules have worn off, cracked or brittle shingles, and piles of granules in the gutters that look like coarse sand. Missing shingles after storms, sagging rooflines, and daylight or stains in the attic are more urgent. One or two damaged shingles is a repair; when the wear is everywhere and the roof is near its age, that is a replacement conversation, not a patch.
Do other roofing materials last longer than asphalt?
Considerably. Standing-seam metal roofs run 40–70 years, concrete and clay tile can exceed 50, and slate lasts a century, all at a much higher install cost. Asphalt shingles win on price and ease of repair, which is why they cover most US homes. If you are replacing anyway and plan to stay put for decades, it is worth pricing metal, because the longer life and storm resistance can pencil out despite the higher upfront number.
Does attic ventilation really change how long a roof lasts?
Yes, more than most owners expect. A poorly vented attic traps summer heat that cooks the shingles from below, aging them years early and sometimes voiding the warranty. In winter, trapped warm air melts snow that refreezes at the eaves into ice dams that pry shingles loose. Balanced intake (soffit) and exhaust (ridge) venting keeps the deck cooler and drier. It is worth confirming your ventilation when you replace, and checking your attic insulation depth at the same time.