How old is too old for an asphalt shingle roof?
Age alone is not the trigger. Condition is. Replace when the shingles show field-wide granule loss exposing the mat, curling or cupping across whole planes, cracking away from the fastener line, or when you are repairing the same roof repeatedly. A twenty-year-old roof in good condition on a well-ventilated attic can have years left. A twelve-year-old roof over an unventilated attic in a hot climate can be finished. Have someone look at the shingles and at the attic, not at the install date.
Warranty years are not service years
A shingle sold with a thirty-year warranty is not a thirty-year roof. The warranty covers manufacturing defects in the shingle, usually on a prorated basis that declines sharply after the first years, and it does not cover installation, ventilation, or weather. Actual service life on a three-tab or architectural asphalt roof depends far more on four things than on the number printed on the wrapper.
Attic ventilation. This is the single largest factor and the one homeowners never look at. A poorly ventilated attic in a hot climate cooks the shingles from below, and the roof ages from the underside outward. Two roofs of the same age and product can be a decade apart in condition on this variable alone.
Slope and exposure. A south or west facing plane in a sunny climate ages faster than a north facing one on the same house, which is why one slope often fails first.
Installation quality. Fastener placement, starter course, valley method, and flashing detail decide where a roof begins to fail. Most premature roof failures are installation failures wearing an age costume.
Weather history. Hail bruises the mat without necessarily removing granules visibly, and a roof that has taken hail ages faster afterward.
Labor estimate, computed
A documented roof condition assessment: walk the accessible slopes, inspect flashings, boots, and valleys, inspect the attic for ventilation and deck condition, and produce a photographed report with a remaining-life opinion.
$82 in labor
$27.20 per hour × 3.0 hours
How this number is built
The wage is an employment-weighted average of the published median hourly wages for Roofers, Standard Occupational Classification 47-2181, across 265 United States metropolitan areas covering 118,240 workers, from the May 2025 OEWS, published May 15, 2026. It is an average of metropolitan medians, not a national median, because the extract behind this site is metropolitan. The labor-hour figure is 3.0 hours: an hour and a half on the roof and in the attic, an hour to produce a photographed written report, and half an hour of travel; a report worth reading is not a fifteen-minute look
The product is a labor cost only. It carries no equipment, materials, refrigerant, permit fee, disposal, travel, overhead, warranty, or profit, and a quoted job price is normally a multiple of it. A working contractor bills a shop rate rather than a wage. Treat this as a floor for the labor content of the work and nothing more.
Source: Bureau of Labor Statistics, Occupational Employment and Wage Statistics.
What to actually look at
Granule loss. Some granule shedding is normal, especially in the first year. Loss to the point where the black asphalt mat is visible across an area, not just at one spot, means the shingle has lost its ultraviolet protection and the countdown is short. Check the gutters: heavy granule accumulation is an early signal.
Curling and cupping. Edges lifting or the centre of a tab dishing. Once a plane is doing this, the shingles no longer seal to each other and the roof is vulnerable to wind.
Cracking. Straight cracks running across the tab, distinct from a tear at a nail. This is thermal fatigue and it is not repairable.
Flashings and boots. These fail long before the field does and are the most common leak source. Their condition is a separate question from the roof's age and is often the real answer to a leak.
The deck, from inside. Soft spots, delamination, rusted nail points, frost or staining on the sheathing. Frost in the attic in winter is a ventilation problem announcing itself, and it will shorten the next roof too if nobody fixes it.
Timing the replacement deliberately
The best time to replace a roof is the year before it fails, on your schedule, with two or three quotes and no water in the house. The worst time is the week after it fails, in the season everybody else needs a roofer.
If a condition assessment says three to five years, that is a planning horizon, not an emergency. Use it. Get the ventilation corrected as part of the eventual replacement, since it is cheap while the roof is off and expensive at any other time. Decide whether you are staying in the house, because a roof that outlives your ownership by fifteen years is money you gave to a buyer.
If the assessment says one to two years and you are selling, a roof at the end of its life is a negotiation item that a buyer's inspector will find regardless of whether it has leaked.
What to ask for in an assessment
A written report with photographs of the specific conditions found, on each slope. An opinion on remaining service life with the reasoning attached. An assessment of attic ventilation with the intake and exhaust noted, since a roof replaced without fixing that will age the same way. And a clear separation between what is a repair, what is deferred maintenance, and what is replacement.
If a leak is what prompted this, our page on repairing or replacing after a leak covers the diagnosis that should come first.
What this site publishes
The labor figure above is computed from published wage data times the stated hours and is labor only. We publish no project prices and reproduce no third-party cost tables. Contractors on record appear alphabetically and never by any commercial relationship.
Sources
Where another organisation publishes a cost range for this work, it is linked below and not reproduced here. Their figures are theirs to maintain, and a stale copy on this page would be worse than a link.
- National Roofing Contractors Association Trade guidance on roof system inspection, ventilation, and service life.
- United States Department of Energy, attic ventilation and insulation
- Federal Emergency Management Agency, building science
- ENERGY STAR, roof products
Reviewer: Not yet assigned, this page is waiting on sign-off from a named roofing contractor, and the slot stays visibly empty until one signs it. Last reviewed: September 20, 2026, the date this build of the page was produced. Review is editorial. It is not a site visit, an inspection, or advice about your specific equipment.
This page names no contractor and recommends none. Contractor listings on this site are ordered alphabetically or by distance and never by any commercial relationship. Nothing here is a rating, an endorsement, or a recommendation, and nothing here is legal advice about your local code.