|
|
|
|
|
|
Component |
Average Life (yrs.) |
|
Roof
Covering |
|
|
Asphalt
standard shingle |
12-15 |
|
Asphalt
premium shingle |
15-30 |
|
Wood
shingle |
10-20 |
|
Concrete/clay tile |
20-40 |
|
Asbestos
cement |
40-80 |
|
Slate tile |
40-80 |
|
Roll
roofing |
5-15 |
|
Tar &
Gravel |
15-25 |
|
Metal |
60 |
|
|
|
|
Heating |
|
|
Forced air
furnace |
10-25 |
|
Oil tank |
40 |
|
Water/steam boiler-welded steel |
15-30 |
|
Water
steam boiler-cast iron |
30-50 |
|
water/steam circulating pump |
10-25 |
|
|
|
|
Cooling |
|
|
Central
air |
10-15 |
|
Heat pump |
10-15 |
|
Window air
conditioning |
10-20 |
|
|
|
|
Plumbing |
|
|
Galvanized
water pipe |
20-25 |
|
Hot water
heater |
5-15 |
|
Septic/sewer pump |
5-10 |
|
Well pump |
10 |
|
|
|
|
Appliances |
|
|
Dishwasher |
5-12 |
|
Dryer |
10-25 |
|
Garbage
disposal |
5-12 |
|
Oven/range |
15-20 |
|
Washing
machine |
5-15 |
|
|
|
|
|
