Materials and workmanship as well as the weather elements in your location determine the lifespan of a roof.
Will a roof over last as long.
When installed correctly a typical standing seam metal roof will last anywhere from 30 to 50 years.
Cedar shake can also go for about three decades.
Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones.
Done correctly a reroof job will look as good and last as long as a new roof for a lot less money and a lot less hassle.
Fiber cement can go up to 25 years and the thicker asphalt can give you about 30 years.
Premium metals such as stainless steel titanium zinc and copper can last well over 100 years.
However there are premium brands that can serve you diligently for 50 years.
If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing.
While many types of roofs last longer than 15 years some can hold up well for 50.
Most homes have asphalt or composite shingle roofing which normally last about 20 years.