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| 581 W. 4th St. #8 Benson, AZ 85602 Benson (520) 586-8626 Sierra Vista (520) 255-0542 |
HEATING SYSTEMS YEARS
Boilers
Cast iron 30 to 60
Steel 20 to 35
Heating Exchangers (steel)
Gas-fired 15 to 20
Oil-fired 20 to 35
Heat Pump Compressor 7 to 12
Heating Pipes
Steel 80 to 120
Copper 60 to ?
Burners
Oil 20 to 30
Gas 30 to 40
Misc. Heating Components
Circulators 20 to 30
Fans 12 to 40
Oil Tanks (inside) 25 to 50
Expansion Tanks 35 to 50
Zone Valves 7 to 10
Note: Heaters need complete replacement when the boiler (water) or heat exchanger
(air) fails.
AIR CONDITIONING YEARS
(Electric)
Compressors 10 to 14
Coils 20 to 30
Fans 12 to 40
PLUMBING SYSTEMS YEARS
Water Service (Public)
Lead 50 to 90
Steel 40 to 75
Copper 70 to ?
Plastic (Should be dependable) Unknown Interior Water Pipe
Steel 1/2" 40 to 60
Copper 1/2" 70 to 100
Plastic (Should be dependable) Unknown Drainage Lines
Galvanized Steel 40 to 60
Copper 60 to 100
Cast Iron 50 to 90
Plastic (P.V.C.) 35 to ?
Lead 50 to 90
Well Equipment
(On-site Water Supply)
Pump-Submersible 15 to 22
Pump-Above Ground 13 to 20
Pressure Tank-Steel 15 to 25
Pressure Tank - Fiberglass 25 to 50
Septic System
(On-Site Drainage System)
Steel Tank 15 to 30
Concrete Tank 25 to 40
NOTE: Life expectancy of leaching fields is determined by porosity of soil and
maintenance (10 to 60 years)
Miscellaneous Plumbing Items
Water Heater
Gas 8 to 14
Electric 12 to 18
Oil Burner 20 to 40
Fixtures
Builders line faucets, etc. 20 to 35
Builders line tub, toilets & sinks 40 to 60
Better quality faucets, etc. 30 to 60
Better quality tubs, toilets & sinks 50 to 90
ELECTRICAL SYSTEMS YEARS
Service cables (depends on exposure to sun) 20 to 40
Wiring (interior)
Knob & tube (cloth insulation, copper conductor) 60 to 90
Armored Cable (copper conductor-BX) 50 to 80
Plastic sheathed (copper conductor-Romex) 70 to Unknown
(It should be 80+.)
Panel Boxes
Fuses or Circuit Breakers 20 to 50
Note: Life expectancy is directly related to moisture in the area of the box (rust &
oxidation of contacts).
EXTERIOR COMPONENTS YEARS
Roof Covering
Fiberglass Reinforced Asphalt Shingles 18 to 25
Note: Roofs wear out sooner on the south side of the house.
Built-Up Roofing, 3- or 4-ply 10 to 15
Note: Installation procedures and regular recoating can extend the life of these roofs
2, 3 or more times.
Slate (depends on the quarry from which it came) 35 to 200
(Maintenance is required.)
Metal Standing or Welded Seams 50 to 90
Note: Metal roofs are mostly tin and will remain functional as long as you keep them
from rusting -- recoat every 4 to 5 years.
Cedar (depends on quality of wood, workmanship, and maintenance) 20 to 40
Gutters and Downspouts
Note: Life expectancies of gutters and spouts depend to some extent on the slope of
the gutters and how clean they are.
Aluminum (gauge of metal is important) 18 to 20
Galvanized (the new painted steel should last longer) 15 to 22
Copper (do not use steel brackets) 35 to 50
Plastic (P.V.C.) 25 to ?
Sidings and Veneers
Aluminum (you may repaint aluminum siding at about 20-23 years to extend life)
18-25
Vinyl 25 to ?
Aluminum with Tedlar coating 35 to 50
Hardboard or composition (depends on finish, exposure to sun and maintenance)
20 to 40
T1-11 Plywood Siding (must receive regular coatings or will not last more than 8
years) 20 to 40
Stucco (70 years without paint, 200+ years with regular painting) 70 to 200+
Asbestos (needs normal maintenance, recommended painting) 40 to 100
Brick. Veneers or complete masonry units. As long as the brick is an exterior brick, it
will only need periodic pointing. 100+
Masonry Walls
Concrete. Brick (see sidings above)
block and stone
Note: Masonry walls are very durable and as long as they are designed properly and
receive periodic maintenance, they should last 100+ years. Exceptions would be
salmon brick, cinder block (instead of concrete block) and Serpentine stone.
Windows
Wood. Usually very dependable and have long life expectancies with regular painting
and storm windows to help protect them. 35 to 100
Aluminum. Usually are marginal in design and functionability. An advantage is their low
cost. 10 to 25
Vinyl. Reasonable window, moderate cost, not enough history to project life
expectancy. 15 to ?
Aluminum storm windows 30 to 40
INTERIORS YEARS
Ceramic Tile (in tub or shower wall areas)
Wed Bed (cement) or Wonder Board Backing 40 to 90
Mastic System (adhesive) 14 to 20
Plaster
Walls 70 to 120
Ceilings 60 to 90
Note: Life expectancy of plaster is altered by the carpentry framing and the type of
plaster lath used.
Drywall (also called sheetrock)
Walls 50 to ?
Ceilings 30 to ?
Note: Not enough history to project the life expectancies.
APPLIANCES YEARS
Refrigerators 10 to 20
Dishwashers 13 to 18
Gas Ranges 20 to 35
Electric Ranges 15 to 25
Garbage Disposal 10 to 15
Humidifiers (Note: 2 years without maintenance.) 5 to 20
Dehumidifiers 8 to 12
Washers 10 to 20
Dryers 10 to 20