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Did you know insulation plays an important role in how your home uses energy? It's also one of the main players in heating and cooling costs. In fact, the Environmental Protection Agency estimates homeowners can save an average of 15% on heating and cooling costs by air sealing their homes and adding insulation to attics, floors above crawl spaces and accessible basement rim joists (Energy Star).

Most people associate insulation with fuzzy rolls of pink stuff and a recognizable cartoon character, but what is it?

Insulation is a classification of materials that are used to reduce heat transfer from the inside and outside of a building. Most commonly, insulation is used in attics, ceilings, walls, floors and crawl spaces to help maintain more constant, comfortable temperatures in your home. 

For qualified upgrades, Inland Power will pay a rebate of $0.75 per square foot of new insulation. See below for the application and program requirements. 


Batts (or rolls) are the most common and available form of insulation, and are often referred to as blanket insulation.

Benefits: Flexible fiberglass batts are manufactured in the right size to fit between wall joists, studs and under floors, and can be easily cut by hand and installed.


Foam board and rigid foam insulation sheets are available in various lengths, widths and densities, and can be used almost anywhere in your home.

Benefits: Can perform up to two times greater than other insulation types with the same thickness and can be purchased at your local home improvement store.


Loose fill or blow-in is made of small particles of different materials that can be blown into areas.

Benefits: Can be blown into areas that may be hard to reach or where it is difficult to apply other types of insulation. Commonly used materials for loose-fill or blow-in are:

  • Cellulose: recycled newsprint.

  • Fiberglass: comprises 40%-60% recycled glass

  • Mineral wool: 75% post-industrial recycled content

Spray foam insulation is a liquid mixture that can be sprayed, injected or poured into place to insulate and reduce air leakage.

Benefits: Conforms to the space where it is applied and is very effective at sealing small cavities and cracks. Some types can have a higher R-value than traditional batt and roll insulation.


Insulation resistance value, commonly known as R-value, is the capacity or measure of the insulation materials to resist heat transfer from one side of an object to another. The higher the R-value of the materials, the more effective it is at insulating the area. R-value can be dependent on the type of material or the thickness used.


Along with insulation, air sealing is another important and cost-effective way to increase comfort throughout your home. Air leakage and improperly installed insulation can waste 20% or more of the energy used to heat or cool a home (Energy Star). Properly sealing the gaps and cracks in your home will:

  • Reduce indoor pollutants and control moisture.

  • Mitigate air leakage through gaps and cracks found in your home. 

  • Help your heating and cooling equipment work more efficiently.


Caulk can be used to fill cracks, gaps, or joints that are less than a quarter inch wide and allow air to escape from your home. These compounds come in various materials, including silicone, latex and polyurethane foam, and are made for specific areas and purposes.

To seal gaps around working windows and doors, use weather stripping, which is typically made of vinyl, rubber or poly foam. Weather stripping can be attached to existing windows and doors to reduce drafts, increase comfort and reduce noise.

Listed below are suggested Insulation contractors who have achieved Gold Star status with Inland. This means they have completed 2+ home installations in a given year for Inland Power & Light consumers.  

Inland Power cannot recommend any one company and recommends doing your due diligence; make sure to get more than one estimate, inform contractor of intent to claim Inland's rebate prior to installation, and ask about warranty details.

Pacific Insulation

  • (509) 879-0495

PNW Insulation Specialists

  • (509) 481-7468

Specialty Insulation

  • (509) 535-1515

Click here for a full list of contractors.


When taking before and after photos, insert a measuring tape or ruler into the insulation. This documentation is required from contractor's and self-installs to qualify for the rebate.




Find out if your upgrade qualifies for a federal tax credit



Insulation Rebate Application


Residential Weatherization Best Practices

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