Introduction
The following represents average life expectancies for certain
systems and components in the home. Life expectancies can
vary greatly depending on the quality of the product and/or
its installation, its exposure to weather and other forms
of damage, the amount of use, and whether it has been properly
maintained.
Structural Components
| Chemical treatment for termites |
10 to 12 years |
| Construct detached garage |
30 to 50 years |
| Install basement entrance |
20 to 40 years |
| Install timber retaining wall |
10 to 15 years |
| Rebuild exterior brick porch columns |
15 to 30 years |
Roofing System
| Conventional asphalt shingles installed
over existing |
12 to 15 years |
| Strip and reshingle with conventional asphalt
shingles |
12 to 15 years |
| Strip and reshingle with top quality asphalt
shingles |
25 to 30 years |
| Strip and reshingle with low slope asphalt
shingles |
10 to 15 years |
| Strip and re-roof with cedar shingles |
20 to 40 years |
| Strip and re-roof with cedar shakes |
25 to 50 years |
| Install concrete tile roofing |
15 years + |
| Install new slate roof |
40 to 200 years |
| Install roll roofing |
5 to 10 years |
| Strip and replace built-up tar and gravel
roof |
15 to 20 years |
| Strip and install single-ply roof membrane |
Best guess - 20 years |
Exterior Components
| Install galvanized or aluminum gutters and
down spouts |
20 to 30 years |
| Install copper gutters and downspouts |
50 to 100 years |
| Install aluminum soffits and fascia |
Indefinite |
| Install aluminum or vinyl siding |
Indefinite |
| Install cedar or paint grade wood siding |
Maintenance dependant |
| Paint trim: windows, doors, soffits, fascia, wall surfaces |
4 to 6 years |
| Install a deck or fence |
10 to 20 years |
| Resurface existing driveway |
10 to 20 years |
| Seal asphalt driveway |
1 to 3 years |
| Install interlocking brick driveway or patio |
15 years + |
| Install concrete driveway |
30 to 40 years |
| Install concrete slab patio |
30 to 40 years |
| Install concrete patio stones |
30 to 40 years |
Heating System
| Install conventional or mid-efficiency forced-air
furnace |
20 to 25 years |
| Install high-efficiency forced-air furnace |
Best guess
20 to 25 years |
| Replace blower and/or motor |
10 to 20 years |
| Install drum-type humidifier |
5 to 10 years |
| Install electronic air filter |
10 to 20 years |
| Install conventional boiler |
20 to 25 years |
| Install high-efficiency boiler |
Best guess
20 to 25 years |
| Install circulating pump |
10 to 25 years |
| Add electric baseboard heater |
15 to 25 years |
Cooling / Heat Pump System
| Add central air conditioning |
10 to 15 years |
| Add heat pump |
10 to 15 years |
| Replace heat pump or A/C compressor |
10 to 15 years |
Plumbing System
| Install hot water heater |
8 to 12 years |
| Replace toilet |
30 to 40 years |
| Replace toilet flush mechanism |
8 to 12 years |
| Install bidet |
30 to 40 years |
| Replace vanity or pedestal sink |
12 to 20 years |
| Replace faucet set |
10 to 15 years |
| Replace bathtub including ceramic tiles |
20 to 30 years |
| Retile bathtub enclosure |
Maintenance dependant |
| Install bathroom exhaust fan |
5 to 10 years |
| Replace laundry tubs |
15 to 25 years |
| Install dishwasher |
10 to 15 years |
| Install garbage disposal |
8 to 12 years |
| Install sump pump |
2 to 7 years |
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