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Average Roof Lifespan

AVERAGE LIFESPAN OF A ROOF

The life expectancy of a roof varies between different roof materials. Here’s the averages:

    • Asphalt Shingles, 3-tab – 15 to 18 years

    • Asphalt Shingles, Architectural – 24 to 30 years

    • Galvalume (metal) – 30 to 45 years

    • Concrete Tile – 35 to 50 years

    • Built-Up or Modified Bitumen – 10 to 16 years

    • EPDM (rubber) – 10 to 16 years

 

 

 

 

 

 

But average lifespan estimates are based on “average” conditions. Many factors contribute to a longer or shorter life of the roof; so a particular roof’s life can vary—sometimes significantly—from the average. Here’s a list of conditions that affect roof longevity:

  • Color of roof – A dark roof absorbs more heat, which shortens the lifespan.
  • Angle of roof slope – Higher pitch roofs tend to last longer.
  • Orientation of roof surface – A roof slope facing south will get more sunlight, and have a shorter life.
  • Multiple-layer roof – A roof installed over an existing roof will have a shorter life.
  • Quality of roof material – “Economy” roof materials have a shorter life.
  • Installation – Sloppy or improper installation shortens roof life.
  • Attic ventilation – An unventilated or poorly ventilated attic reduces roof lifespan.
  • Trees near roof – Tree branches rubbing on a roof or the acidity from the accumulation of leaf debris on a roof shortens its life.
  • Harsh climate – Severe weather, both harsh winters and hot summers, along with big temperature swings within a 24-hour period, also shorten lifespan because of the expansion and contraction of roof materials.