The life expectance for components in a Home.
Roofs
Shingles 15 to 25 years, 25 to 30 years up 50 years
Tile roof 25 years to 50 years
Plumbing: Cooper pipes 40 to 50 years
Air conditioning systems expected lifespan About 15 years
Heat Pumps About 16 years
Clothes dryers: About 13 years
Electrical ranges & Refrigerators: About 13 years
Microwaves: About 9 years
Dishwashers: About 9 years
Shower stalls and pans About 15 years