Big City Insulation
of Idaho
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What Does the R-Value of Insulation Mean?

If you’ve read about insulation, you’ve probably seen the term “R-value.” But what is it and what does it mean? R-value indicates how effective a particular material is. This term of measurement plays a significant part in determining how much insulation is needed and the savings that can be gained.

How Is Insulation R-Value Calculated?

Let’s start at a base point: Solid wood has an R-value of 1. An R-value is also calculated per inch of width. Therefore, a three-inch-thick board has an R-value of 3. Blown fiberglass installed in the attic has an R-value of 2.2 per inch, so 12 inches of it would give you an R-value of 26.4.

Ready for an estimate? Contact us about pricing for your project.

What R-Value Is Right for My Boise Home?

Generally, a higher R-value means a more effective insulator, but the highest R-value possible may not necessarily be right for your project. Homes in certain climates don’t need as much insulation as others.

For example, homeowners in Florida don’t need to worry about insulating against extremely cold temperatures — the weather is quite different here in Idaho. That’s why different regions of the U.S. have different recommended insulation levels.

The Boise area is in zone 5.

Insulation R-value climate zone map of the U.S.


How Much Insulation Should I Install in My Home?

Where to install insulation is the second thing you’ll need to know because different areas of your home require different R-values.

Attic insulation needs a higher R-value than wall insulation because heat naturally rises and commonly escapes through your attic. Different materials also differ in R-values. For example, spray foam has a different R-value than fiberglass.

After you’ve determined your zone and where your insulation needs to go, then you look at your different options and types of insulation.

This is a lot of information, but don’t worry — you won’t be doing this on your own. An insulation company can help you with all your needs and explain the R-value and right amount of home insulation for you.

Contact Your Local Insulation Contractor for Insulation Solutions in Boise, ID

The R-value shouldn’t be the only determining factor when you choose insulation. How old your home is, its location and building materials are all factors in choosing the right insulation. Cost and the inhabitants of the home are other factors in your decision-making. No matter what type of insulation you choose, Big City Insulation of Idaho can help.

Contact us to learn more about our insulation installations or if you’re ready to install insulation in your Boise area home.

Services We Provide
Residential Insulation

Our insulation team adds energy efficiency, comfort and value to new and existing homes.

Commercial Insulation

Big City Insulation of Idaho is a leading installer of commercial fiberglass, rigid board and rockwool insulation.

Insulation Removal

Big City Insulation of Idaho provides home insulation removal services.

Window Coverings

Our team provides professional window blind and shutter installation for your home or business.

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