A recent survey by Bank of America Home Equity and conducted by the National Association of Home Builders gives real world estimates of the life expectancy of a variety of home appliances. Here are a few:

Gas ranges: 15 years or more: With no motor or many moving parts, gas ranges are the most trouble-free of appliances.

Refrigerators: 13 years: The compressor on refrigerators works hard and runs often. Add complications, such as automatic icemakers and there’s more to go wrong. That they last as long as they do is a tribute to their generally high quality.

Dishwashers: 9 years: This appliance gets widely varying amounts of use, depending on the household.

Cabinets: 50 years: Good quality cabinets are built to last a long time but styles go in and out of fashion. Many homeowners replace cabinets after a fraction of their useful life.

Countertops: 20 years to forever: Granite could outlast you–by a long shot. Cultured marble has a lifespan of about 20 years.

Concrete and masonry: 100 years plus: Concrete foundations, including chimneys and fireplaces, should last a lifetime and brick walls have a life span of 100 years or more.

Decks: up to 20 years: In ideal weather, figure 20 years. In monsoon conditions, count on half of that.

Electrical: 10 years to a lifetime: You shouldn’t have to replace good quality copper wiring but switches and other controls may have to be replace every 10 years or so.

Roofing: 20 to 50 years: Local weather conditions are critical but, on average, slate copper, and clay/concrete tile roofs last the longest, 50 years ore more. Figure wood shake roofs for 20 years, fiber cement shingle 25 and asphalt shingle 20.