Putting a second layer of roof on your house will only last two-thirds as long as the first. To stop ring around your bathtub, wipe the sides with liquid Calgon dishwasher detergent and let it dry. The same additive that helps dishes dry without spots will also repel dirty bathtub water and divert more of it down the drain. Pouring a tablespoon of baking soda down your garbage disposer once a week can stop odors. Stains on the side of a house often signal leaks in the roof tiles or flashing.
Radon gas can exist in homes without basements.
Even pressure treated lumber can deteriorate if not maintained properly. Installing a timer on your electric water heater can cut heating costs by two-thirds. Old screw-in fuses can be safer than circuit breakers if properly installed. For electric heat pumps, set the thermostat then leave it alone for maximum savings. Moving the temperature setting up and down can cost a lot more.