How Long Should It Last?

Average Life Spans of Common House Components in Years

Siding

Brick 100
Aluminum 80
Wood 25~35
Stucco 25
Vinyl 18

Roofing

Slate or Tile 45
Metal 25
Asphalt 20~30
Wood 20

Windows

Unclad Wood 39
Aluminum 23
Vinyl 19

Exterior

Gutters & Downspouts 30
Exposed Concrete Slabs 25
Exterior Doors 25~50
Exterior Paint / Stain 7~10

Interior

Insulation 100+
Wood Floors 100+
Toilets 25
Drywall 30~70
Faucets 13~20
Carpeting 11
Sinks 5~30

Appliances

Furnace / Heat Pump (indoor unit) 18
Refrigerator 17
Central Air-conditioning/ Heat Pump (outdoor unit) 15
Water Heater 14
Clothes Dryer 14
Clothes Washer 13
Smoke Detector 12
Dishwasher 10

Source: National Institute of Standards and Technology, National Association of Home Builders Research Center, interviews with contractors.