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Insulation R-Value

If you want to improve your home’s overall energy efficiency, you’re probably looking into insulation—and if you aren’t, you should be! Insulating your home is one of the best ways to help maximize energy efficiency and save money.

But how much insulation should you install? This is where the ever-important R-value comes into play. What is insulation R-value and what does it mean for you?

How Is Insulation R-Value Calculated?

In simple terms, the R in R-value stands for resistance, and it’s a basic measurement of an insulation material’s resistance to heat.

Let us show you an example: 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 in your attic installation project.

Insulation professionals will be able to tell you how much insulation you need, based on:

  • What region you live in (see the map below)
  • What type of HVAC systems you have
  • The size of your home
  • Where you need to insulate
  • And more

One of the most important aspects is where you live.

What Are Recommended R-Values for the Portland Area?

Here in the Portland, Oregon area, we are in zone 4. When there is no insulation, ideal attic insulation R-value is R38 – R60. For floors, the typical R-value range is R25 – R30.

Of course, it’s important to talk to your insulation company about specifics. They’ll be able to determine how much insulation you need and recommend solutions for your unique situation and any special cases.

Related to R-value and how much insulation you need, professionals will help you determine where you need to insulate (attic, walls or crawl space) and what type of insulation to install. Your options are:

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

Home Insulation in the Portland, OR Area

The R-Value shouldn’t be the only determining factor. How old your home is, its location and building materials also play an important role when it comes to choosing the right insulation. Cost and the inhabitants of the home may be another factor in your decision-making. Whatever the type of installation you need, Installed Building Products Portland can help. As part of the IBP family of companies, we offer the resources and expertise that few local companies can match.

Contact us to learn more about our insulation installation services or if you’re ready to install insulation in your Portland area home!

TESTIMONIALS

I had Installed Building Products Portland put up this plastic coated paper in my shed to hold up my insulation. It made it look so..

– Pam
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