How Long Does a Roof Last?

Updated 2026-10-24 · Sources checked

"Or how long would you expect the roof to last?"

One commenter in a roofing thread asked it that way. Most new roofs are designed for about 20 years of useful service¹, and some, such as slate, clay tile and certain metals, can last longer. A metal roof can last up to 50 years or more². A design figure is not an expiry date, and where your roof stands shows in a few checks.

Quick answer:

Look at ceilings, interior walls and the attic for water stains and discoloration³.
Look from the yard at the shingle edges for peeling or curling⁴.
Write down the roof's age and material, and photograph what you find with the date.
Get a written proposal⁵ from a roofer you chose before you decide to repair or replace.

On this page

How do I know where my roof is in its life?
Do I need a new roof every 15 to 20 years?
Repair or replace: signs toward each side
If you were told it's time for a metal roof, or that you get what you pay for
Does an old roof change my insurance?
What to ask the roofer, and what to get in writing

What you note down in these checks is what a roofer will want to know, so you can have it ready today.

How do I know where my roof is in its life?

Start inside the house, then look from the yard. Don't go up to check: avoid getting on the roof whenever a task can be done from a ladder or other stable platform⁶.

Photograph and write down each of these, with the date:

Water stains and discoloration on ceilings and interior walls³.
Stains or discoloration on the rafters and the insulation in the attic³.
Shingle edges that begin to peel up and curl with time⁴, or shingles that split: curling or splitting is evidence of deterioration⁷.
Dislodged or missing shingle tabs, which should be repaired to maintain weathertightness⁷.
The roof's age and what it is made of.

Not sure when the roof was last replaced? How to find out when your roof was replaced.

Do I need a new roof every 15 to 20 years?

Not by the calendar alone. About 20 years is the design figure for most new roofs¹, and some types can last longer. Asphalt shingles, the most familiar roof, last about 20 years on average⁸. Metal costs more up front than asphalt shingles² and can last up to 50 years or more². "Up to" is a ceiling, not what to expect. As one commenter put it, "Metal roofs last a long time, but not forever."

How long a shingle roof lasts doesn't come down to one expiry year either. The curling edges, splits and missing tabs above tell you where yours is.

Already at that age and torn between patching the roof and replacing it? How to tell if your roof needs repair or replacement.

Repair or replace: signs toward each side

Toward repair: a few dislodged or missing tabs. They should be repaired to keep the roof weathertight⁷.

Toward replacing: shingles that curl or split across the roof, and one trade rule of thumb: more than 10% of the old roof needing repair points to a new roof⁹. Use it as a question for your roofer: what share of my roof needs work? If you find a water stain or damp insulation: it can mean a leak. Wet or damp insulation indicates a leaky roof¹⁰. Photograph it, then ask a roofer you chose to look at it. Ask whether water is getting in now and how long they expect the repair to last.

If you were told it's time for a metal roof, or that you get what you pay for

Two pieces of advice show up in homeowners' threads. Each has a plain answer.

Just go metal. In a thread about a denied homeowners insurance application, a reply said, "Time for a metal roof, those things last a hell of a long time..." Metal can last up to 50 years or more², and only certain metals are named as lasting longer¹ than the usual design life. Ask for the price of both options in the written proposal.
Pay more, get more. Don't automatically choose the lowest bidder, and ask for an explanation if there's a big difference among the estimates¹¹. A high bid and a low one get the same question: what does the written scope include?

Does an old roof change my insurance?

It can. Some insurers may decline to write new policies for homes with older roofs¹², or may cover the roof only at actual cash value. That means the policy pays the amount needed to replace the item minus depreciation¹³, so depreciation lowers the payout.

In Texas, for example, an insurance company won't pay for a new roof just because it's old or worn out¹⁴. Wherever you live, ask your insurer or your state's insurance department whether a similar rule applies to your policy.

Check your deductible, the amount you pay before the insurer does. If repairs cost about the same or less, filing may not be worth it, and a written estimate from a roofer you chose yourself helps you decide¹⁵. If you suspect damage rather than age, contact your insurance company or a roofer you choose, not one who shows up uninvited¹⁶.

Can an insurer drop you over your roof's age? Homeowners insurance cancelled because of your roof.

What to ask the roofer, and what to get in writing

Ask for a proposal on paper: insist on a written proposal with complete descriptions of the work and specifications⁵. Ask the roofer to price the repair and the replacement separately, so you can compare them line by line.

You can send this:

I am deciding whether to repair or replace my roof, which is about (age) years old and made of (material). Please list in writing what each option includes. Please also put in writing the price of any hidden damage you find once the work starts.

If a roofer pushes you to sign today or won't put this in writing, that is an answer too: weigh it against the bids that do. A proposal on paper is also how you tell a straight roofer from a pushy one.

Before you sign, read the warranty carefully and understand the provisions that will void it⁵. On payment, don't pay the full amount up front, and some states limit the down payment¹¹. In Maryland, for example, a contractor cannot accept more than 1/3 of the contract price as a deposit¹⁷. Wherever you live, ask your state's consumer protection office what limit applies. At the end, in Wisconsin, for example: never sign a completion certificate or make final payment until you are satisfied and all work is done as specified¹⁸.