SoCalGas - Caulking and Insulation
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Caulking and Insulation

Caulking and weather-stripping help seal your home and reduce drafts, keeping heat inside during winter and cool air inside during summer. Insulation blocks the flow of heat through attics, floors and walls by forming “dead air” spaces. Having adequate insulation can help save on energy costs up to 25%, and caulking and weather stripping can save up to 5% on heating costs.

Southern California Gas Company (SoCalGas) provides weatherization and furnace repair/replacement to qualified limited-income renters and homeowners.


  • The following types of insulation are available at hardware, building supply stores and lumberyards: blanket or batts, loose-fill / blown-in, rigid, and reflective.
  • When choosing insulation, be sure it meets local building codes and always consider the R-value, a measure of effectiveness. "R" stands for the resistance to heat flow; the higher the "R" number, the greater the insulating power.


  • When deciding which weather-stripping materials to buy, consider installation instructions, how long it will last, where it will be used and the price.
  • Instructions for installing weather-stripping can be found in home improvement books or weather-stripping kits. You can also ask home improvement personnel for advice on installation and which type of material you should buy.
  • Read our tips on hiring a contractor.


  • Caulking should be used to seal gaps between nonmoving parts of doors and windows (such as around frames) and other small openings around the house. You should use the highest quality caulking material suited for your job.
  • Common types of caulking are oil-base, acrylic latex, butyl, polyvinyl, and silicone. Caulking materials come in rope form, tubes and disposable cartridges for use with caulking guns. The most common method of applying caulking is with a caulking gun.
  • Check with home improvement stores for the caulking that best suits your needs.
  • Read our tips on hiring a contractor.

Where can I get more information about insulation, caulking, and weather-stripping?

The actual energy savings obtained in each instance depend on various factors, including geographic location, weather conditions, equipment installed, usage rates, and so forth. Completing multiple energy saving measures will not necessarily result in cumulative savings. Any rebates provided are subject to satisfaction of applicable qualification rules. Certain rebate programs may be modified by the California Public Utilities Commission (CPUC), and are subject to the availability of funds.

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Wall insulation

Conservation Tip Video

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Rebates Available

You can receive cash rebates on clothes washers, dishwashers, attic/wall insulation, natural gas storage water heaters and furnaces. Go to Rebates for Your Home.