When you hear R-Value, do your eyes glaze over? It’s okay, that’s why we’re here, to help. If you want to keep heat inside your home during the winter and prevent it from entering during the summer, look no further than insulation.

A properly insulated home can not only keep you warm in the winter, and cool in the summer, but can help you save money on your utility bills!


Simply put, insulation slows heat flow.

Insulation comes in many forms: blown-in cellulose, fiberglass batts, and spray foam, to name a few. When thinking about insulation it is important to understand the basics of R-Values (we swear, it’s easy to remember!). R-Value is a measure of the insulation material’s ability to stop the flow of heat. If you remember one thing about R-Values, remember that the higher the R-Value, the better the insulation.

When insulating your home it’s important to think about all the areas of your home that you want to be heated or cooled. In other words, your home’s thermal boundary. Once that is determined, you can work on air sealing and insulating hand-in-hand. Before adding insulation, it’s important to address air leakage (visit our air sealing page).

Insulating can save you money and improve your comfort. Unsure of how well your home is insulated? Get a Home Energy Assessment. During the assessment, a certified Building Analyst will record your home’s current insulation level and list what improvements can be made.


CORE rebates: 25% of project cost up to $500

Home Energy Assessment required. Insulation projects must conform to the 2015 International Energy Conservation Code (IECC).

The R-value of the insulation must meet the following minimum requirements:

  • Ceiling: R-49
  • Wood frame wall: R-20 cavity insulation and R-5 continuous or R-13 cavity insulation and R-10 continuous
  • Mass wall: R-19; R-20 if more than ½ the insulation is located interior surface of the mass wall
  • Floor: R-30 to R-38 (depending on your home’s climate zone)
  • Basement and basement wall: R-15; R-19 if more than ½ the insulation is located on the interior surface of the basement wall
  • Air sealing must be completed prior to adding insulation, unless you are already at or below 0.35 Natural Air Changes per Hour (NACH)

Utility rebates may be available:
Aspen Electric | Holy Cross Energy | Black Hills Energy |  Glenwood Springs Electric | Xcel Energy