Go up into your attic and inspect for insulation. If your attic has insulation but you can still clearly see the joists, or if you find a leak in the attic roof, you need new insulation. If your attic has no insulation at all, you'll soon enjoy lower energy bills.
Take measurements to estimate how much insulation you'll need.
Go out to your local hardware store and purchase batt or fiberglass roll insulation. You can purchase blown installation, but you will have to rent an insulation blower and follow strict safety guidelines (for this insulation method it is best to hire a professional). Minimum recommended R-values are:
- R-49 for the U.S. northeast, north, midwest, northwest, and southwest
- R-38 for the Texas and Louisiana coastline and Florida, Hawaii, and California
Install insulation between the joists using manufacturer's instructions. If using batts, make sure to close all seam gaps between batts. Also make sure not to compress insulation when installing it.
Things You Will Need
- Batt, blow-in, or fiberglass roll insulation
- When buying insulation, the higher the R-value, the greater the energy efficiency. Figures provided in Step 3 are the minimum R-value recommendations; the homeowner has the option of going higher for increased energy savings.
- Batt insulation generally has a higher R-value per inch when installed correctly.
- For homeowners with electric heat, R-49 or greater is recommended regardless of where the person lives.