How long does a roof last?

Published July 21, 2026.

Most roofs are asphalt shingle, and how long yours lasts comes down mainly to the shingle type. Basic 3-tab shingles typically last about 15 to 20 years, while the thicker architectural (also called dimensional) shingles most homes use today last about 25 to 30 years. InterNACHI’s life expectancy chart puts 3-tab at 20 years and architectural at 30, and This Old House lands in the same place. Other materials last much longer: metal roofs run about 40 to 80 years, clay or concrete tile 50 to 100 or more, and slate 60 to 150 years. These are benchmarks for a roof that was installed well and vented properly, so treat them as planning figures, not a guarantee for your house.

How long asphalt shingles last

Since asphalt covers most homes, this is the number that matters to most readers.

Standard 3-tab shingles are the flat, single-layer type. InterNACHI’s chart lists them at about 20 years, and This Old House gives roughly the same. In practice many roofers plan for 15 to 20 years, and Bob Vila notes warranties of up to 25 years on these.

Architectural or dimensional shingles are thicker and built up in layers, which helps them shed water and resist wind better. InterNACHI lists them at 30 years, and This Old House puts them at 25 to 30. That extra durability is why they have become the default on new roofs.

One honest caveat: the number on the wrapper is a best case. A “30-year” architectural shingle assumes good installation, balanced attic ventilation, and a reasonable climate. In hot, sunny, or storm-prone areas, plan on the lower end and start paying closer attention once the roof passes 20 to 25 years. You can estimate where your roof sits with our roof lifespan calculator.

Roof lifespan by material

If you are comparing materials or weighing a replacement, here is how the common roofing types stack up. Ranges combine InterNACHI’s life expectancy chart with This Old House and Bob Vila, and they vary with climate, product grade, and install quality.

Material	Typical lifespan	Notes
Asphalt shingle, 3-tab	15 to 20 years	Most affordable; shortest-lived common option
Asphalt shingle, architectural	25 to 30 years	Thicker, layered; today's standard choice
Metal	40 to 80 years	Thicker gauges last longest; great in snow
Wood shake or shingle	25 to 40 years	Depends heavily on climate and upkeep
Clay or concrete tile	50 to 100+ years	Very durable; heavy, needs strong framing
Slate	60 to 150 years	Longest-lived; premium cost, specialist install

Wood shake is the widest range on the list. InterNACHI lists wood at about 25 years, while This Old House puts well-maintained shakes at 40 to 50. Both can be right: in a dry climate with regular maintenance, wood lasts a long time, and in a humid or shaded spot, moss and rot cut it short.

What shortens or extends a roof’s life

Two identical roofs on two different houses can wear out years apart. This Old House points to materials, workmanship, and local weather as the main drivers. Here is what moves the number for you.

Climate and sun exposure. Intense heat and UV bake asphalt over time, and hot regions see shorter shingle life. Hail, high wind, and hard freeze-thaw cycles all take a toll too.
Attic ventilation. A balanced attic system lets heat and moisture escape. Poor ventilation traps heat that cooks shingles from below and moisture that rots the deck, which is one of the more common reasons a roof fails early.
Installation quality. Workmanship and a proper underlayment matter as much as the shingle you pick. A good install reaches the material’s rated life; a rushed one does not.
Shingle color and quality. This Old House notes lighter colors perform better in sunny regions because they run cooler. A higher-grade architectural shingle also outlasts a bargain 3-tab.
Slope, drainage, and trees. Roofs that drain well and stay clear of overhanging branches and trapped debris hold up longer. Standing water and shade that feeds moss shorten the life.
Maintenance. Clearing debris, keeping gutters flowing, and fixing small problems early keeps minor damage from spreading.

None of these is a small tweak. Ventilation and installation in particular can be the difference between a roof that reaches 28 years and one that gives out at 18.

Signs your roof is near the end

You do not have to guess. A roof usually tells you it is wearing out before it fails outright. Watch for these.

Curling or cupping shingles. Edges that lift or corners that curl signal aging or a moisture and heat problem underneath.
Granule loss. Some granules shed normally, but heavy loss leaves bare patches where the black asphalt shows through, which IKO flags as a replacement sign. This Old House suggests checking your gutters and yard for granules after storms.
Cracked, brittle, or missing shingles. Shingles that crack or feel brittle when pressed, or that have blown off, are past their prime.
Leaks and water stains. Stains on ceilings or walls, or repeated leaks in more than one spot, mean water is getting past the roof.
Sagging. A roofline that dips between rafters points to a deck or structural issue and needs a pro promptly.
Age. Once an asphalt roof passes about 20 to 25 years, have it looked at even if it looks fine from the ground.

One sign alone might be a repair. Several of these together, especially on an older roof, usually means it is time to replace rather than patch.

When to inspect versus replace

Inspection is cheap insurance; replacement is a major project. Do the first often so you can time the second well.

This Old House recommends checking your roof about twice a year and after major storms. Much of that you can do safely from the ground with binoculars, looking at the field of shingles, the valleys, and the flashing where the roof meets walls and chimneys. Walk the yard for fallen granules or shingle pieces after heavy weather.

Call a roofing pro up onto the roof when you see warning signs, after severe hail or wind, or once the roof is in its final years. A licensed roofer can tell whether you are looking at a spot repair, a few more seasons of life, or a full replacement, and can check the attic ventilation and decking that you cannot see from outside.

Plan for replacement as the roof nears the end of its material’s range, not the day it starts leaking. A roof that is 3-tab at 18 years or architectural at 25 is worth budgeting for, so you are choosing your timing instead of reacting to water in the living room. Anything involving structural sagging, active leaks, or safety should go to a licensed roofing contractor, and always confirm against your local codes.

Sources

InterNACHI · Standard Estimated Life Expectancy Chart for Homes. nachi.org/life-expectancy.htm
This Old House · How Long Does a Roof Last? thisoldhouse.com/roofing/how-long-does-a-roof-last
Bob Vila · How Long Does a Roof Last? bobvila.com/articles/how-long-does-a-roof-last
IKO · Signs You Need a New Roof. iko.com/na/blog/5-signs-you-need-a-new-roof

Roof lifespan calculator →

Frequently asked questions

How long does an asphalt shingle roof last?

It depends on the shingle type. Basic 3-tab shingles usually last about 15 to 20 years, and InterNACHI and This Old House both put them near 20. The thicker architectural (dimensional) shingles most homes use today last about 25 to 30 years, and InterNACHI lists them at 30. Those are benchmarks for a well-installed, well-ventilated roof. Hot, sunny climates and poor attic ventilation can pull the real number several years lower.

What roofing material lasts the longest?

Slate lasts the longest by a wide margin. This Old House and InterNACHI both put slate at roughly 60 to 150 years, and Bob Vila describes good slate lasting a century or longer. Clay and concrete tile come next at 50 to 100 or more years, and metal roofs run about 40 to 80 years depending on the gauge and quality. Asphalt shingles are the shortest-lived of the common choices, which is part of why they are also the most affordable.

What are the signs a roof needs to be replaced?

Watch for shingles that curl at the edges or lose granules, granules collecting in your gutters, cracked or missing shingles, and leaks or water stains on the ceiling. This Old House notes brittleness and sagging between rafters as later warning signs, and IKO points to large bare patches where the black asphalt shows through. Age matters too: once an asphalt roof passes 20 to 25 years, it is worth a professional look even if nothing obvious is wrong. Several of these signs together usually means replacement rather than a patch.