Home Weatherization

dad and daughter with insulation

Weatherization In Your Home

Whether you own or rent your residence, the winter cold and summer heat can rob your home of its comfort and increase energy costs. By installing high-efficiency attic insulation, floor insulation and windows, you can reduce your energy bill. Many older homes have less insulation than homes built today, but even adding insulation to a newer home may pay for itself within a few years. It can also increase property values, reduce noise and enhance comfort all year round.

How insulation works

Insulation is like a blanket for your home that blocks heat loss in the winter and heat gain in the summer. It is rated according to an R-value- its ability to resist heat flow. The higher the R-value, the greater the insulation’s effectiveness. Insulating up to the maximum recommended for your climate zone should always be your first priority. ENERGY STAR® estimates that you can save up to 20% on heating and cooling costs just by insulating and sealing your home against air leaks alone.

Types of Insulation

Attic Insulation: To achieve the biggest savings, the easiest place to add insulation is in the attic. Properly insulating and air sealing your attic will help reduce your energy bills.

  • Is your home built before 1980?
  • Are your energy bills excessively high?
  • Are you uncomfortably cold in the winter or too hot in the summer?

If you answered yes, chances are that your home may require additional insulation.

  • The recommended insulation level for most attics is R-38 (or about 10-14 inches of insulation, depending on the insulation type).
  • In the coldest climates, insulating up to R-49 is recommended.

Floor Insulation: Insulating your home flooring is also important. Heat loss through an uninsulated floor over a vented crawl space can be significant. Depending on the size of your home, you can save significantly in heating costs by insulating your floor.

Windows: Look for windows with energy saving features such as: ENERGY STAR-qualified windows, low-e coating, double panes, and vinyl or fiberglass frames. A window's ability to insulate is given by its U-value. The lower the U-value, the more efficient the window. Also look for the NFRC (National Fenestration Rating Council) label as your guide to window energy performance.

 Other ways to weatherize your home

There are many other ways that can help you increase the energy efficiency of your home such as:

  • Ceiling and duct insulation
  • Duct leakage sealing
  • Shell infiltration sealing
  • Insulation of water heater and water heater pipes
  • Minor home repairs
  • Heating and cooling system repairs/replacements

These measures may be available to income-qualified customers at no cost in certain areas. Click here to learn more about Southwest Gas’ Assistance Programs available in your state.

More Savings with Rebates

Southwest Gas residential customers can save even more money with weatherization rebates available in the following areas:


Window Rebates

* In order to qualify for the Southwest Gas weatherization rebates, weatherization measures must be installed by a Southwest Gas Authorized Contractor in your area.


Additional Resources

  • For more information on home weatherization, download our brochure or call
    our Energy Specialists at 1-800-654-2765.
  • For information regarding the U.S. Department of Energy’s Weatherization Assistance Program visit www.eere.energy.gov.
  • You can easily conduct a do-it-yourself energy audit. Visit the U.S. Department of Energy’s Energy Savers website at www.energysavers.gov for simple ways you can perform a home energy assessment.
  • To find out the minimum recommended R-values based on your climate zone, click here.