How Long Home Components Last

What this table is for

When something breaks, the first question is usually whether to fix it or replace it. Age is a big part of the answer. A repair on a part that is near the end of its typical life often buys little time. The same repair on a young part is usually money well spent.

This table gives a rough sense of where a part sits in its life. It lists a selected set of components from the Standard Estimated Life Expectancy Chart that InterNACHI, an association of home inspectors, publishes. The chart is much longer. We kept the parts that most often come up when a homeowner is weighing a repair against a replacement, and we left out the rest. The full chart is on the InterNACHI site.

These are estimates, not promises

Read every number here as a typical figure, not a deadline. InterNACHI says the same on its own page. It describes the chart as a general guideline and says it should not be treated as a guarantee or a warranty. Its figures assume regular recommended maintenance and normal wear, and not extreme weather, neglect, over-use or abuse.

Several things move the real number. A hot climate is hard on asphalt shingles. Severe weather such as hail can shorten a roof's life or cause isolated damage. Hard water, with its high mineral content, can shorten a water heater's life. Installation quality matters for almost everything. Parts that get regular maintenance usually outlast parts that do not. And appliances are often replaced for style or technology long before they wear out.

How to use the table

Find your part, then compare its age with the range. Use your browser's find command to jump to a row, and on a phone each row becomes a card. A range such as a low number to a high one is the spread the chart gives. A plus sign means the chart gives a minimum.

Then think about a few things. First, where does the part sit in its range? Second, how bad is the problem: a small, clean fix on an old part is different from a failing core component. Third, what is the repair likely to cost compared with a replacement? Ask a licensed professional for both prices on the same scope, in writing.

Worked example: a water heater with a leak

A homeowner has a conventional water heater that has started to leak from the tank. She looks up the row in the table and sees that the chart gives a range of years for conventional units. Her unit is inside that range, near the upper end. A leak from the tank itself is not a part that a plumber can patch, so age is only part of the story here. She also has hard water, which the chart says can shorten the life of water heaters.

She asks a licensed plumber for a written replacement price and checks whether the unit has a warranty left. She does not count on the chart to tell her the answer. She uses it to understand that a replacement, not a repair, is the likely outcome, and to avoid being surprised by the price.

When to call a pro

Call a licensed professional when the part is a safety item or hard to inspect. That includes gas appliances and gas lines, electrical equipment, anything on the roof, and anything that could affect the structure. Do not wait for a part to reach the end of its typical life if you see warning signs such as water, rust, a gas smell, scorching or a strange noise. A part can fail early, and one can outlast the range.

If the damage came from a sudden event such as a storm or a burst pipe, the age of the part may also affect what an insurer pays. The depreciation guide explains why.

Next steps

If your concern is the roof, the repair or replace the roof troubleshooter uses these lifespans to point you toward a repair, an inspection or a replacement plan. When you are ready to get estimates, use the hiring a contractor checklist. To find out whether an insurer might pay, try is my damage covered?. For upkeep that stretches a part's life, see the annual home maintenance checklist.

Sources

1. InterNACHI, Standard Estimated Life Expectancy Chart for Homes nachi.org