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Interior
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Heating systems
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Electric baseboard heaters
Electric furnace with air blower
Forced air oil
conventional efficiency
mid to high efficiencies
Forced air gas and propane
conventional efficiency
mid to high efficiencies
Note that if these above units have air conditioning combined with them, the overall life span can be reduced by 10 years or more.
Boilers oil or gas, Cast Iron steel
Boilers oil or gas, Steel on steel
Air conditioners electric
Air to air thermo-pumps
Ground source thermo heat pumps
Since the interior evaporator coil of the a/c produces moisture and water that drips on the heat exchanger, it substantially reduces the normal life expectancy of any furnaces.
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35 years +
15 to 25 years
25 years
25 years
15 years
15 to 20 years
35 to 100 years
35 to 50 years
10 to 15 years
10 to 15 years
20 years
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Oil tanks (steel)
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Interior
Exterior (unprotected from the elements)
(protected from the elements)
Propane tanks
Gas metres
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20 years
10 years
20 years
10 years +
10 to 15 years
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Interior Plumbing System
The hardness of the water, base temperature, hot water temperature will affect the life expectancy.
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Drain lines
Cast Iron
Galvanized plumbing (see Insurance issues)
Copper
ABS, PVC and other plastic/polymer composites
Supply lines
Lead
Galvanized plumbing (see insurance issues section)
Copper rigid or flex pipes
Plastic (Pex, Plex, Plexiglas)
ABS
PVC
Septic system with leaching bed
(If well maintained and pumped regularly)
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50 to 200 years
5 to 40 years
50 to 75 years
50 to 100 years
50 to 200 years
10 to 50 years
50 to 75 years
50 to 75 years
50 to 75 years
20 years
20 years + |
Electrical wiring
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Knob & tube wiring (see insurance issues)
Copper (Romex, NMD)
Non metallic sheathing, wet underground wires
Exterior above head wires
BX sheathed wires
Aluminium wires (some maintenance and insurance issues)
Rigid conduit wiring
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50 to 75 years
75 years +
50 years +
35 years
75 years +
75 years +
75 years +
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Interior wall finishes
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Paint (premium quality)
(standard quality)
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4 to 10 years
2 to 4 years
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Floor Covering
We would like to stress the importance of properly preparing the floor surface to be covered, and the importance of a solid base. The quality of the under-pad can make a substantial difference to the lifespan of a carpet.
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Hardwood floors
Manufactured wood laminates
Vinyl cushion, tiles
Ceramic tiles floors
Marble tiles
Slate tiles
Carpets
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50 to 150 years
25 to 50 years+
15 to 20 years
15 to 25 years
25 to 75 years
200 years
10 to 25 years
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