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That depends pretty heavily on the area you are in, the type of weather and environment you have and most importantly how the roof was installed.

Most manufactures include a 15 to 30 year limited warranty on traditional asphalt 3 tab shingles, so that is a good place to start.

You can assume that the manufacturer is going to be sure to only warranty their product for the assumed 'best life' of the product, so in a best case scenario I would tag on an extra 10, 15 maybe even 20 years if you live in an area with mild weather.

Most people are not that lucky. In my experience asphalt roofing tends to start showing its age at around 7 to 10 years. In temperate climates with medium humidity you will start to find algal staining. If you roof is near a tall tree you can get damage from debris or dampness. Cracking from excessive heat exposure. 3 tab roofing can also be effected by conditions with in the house which can cause nails to 'pop up' under the shingles compromising the condition of your roof. Weather plays a very big role in the life of your roof. Strong winds, hail, freezing rain, heavy snows and even excessive UV exposure can take decades off of your roofs useful life in just one day.

Other issues that can prematurely age your roof include improper venting, inadequate flashing, non functional gutters or clogged gutters (this is a very big one!!!) Quality and age of the sub roof materials. Quality of materials and installation of valleys, ridges and flashing around chimneys, vent, skylights and other roof components. (These are the first to fail on a bad roof install, and they can ruin a whole roof as well as you home with in when it goes!)

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11y ago
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12y ago

They are usually guaranteed for 30 years. However, they are now making a shingle that is guaranteed for 50 years.

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11y ago

One hot sunny day.

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Q: How long does a shingle roof last?
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