R-Value and the Amount of Insulation a House Should Have

November 5, 2014

As an insulation contractor, you may be asked how much insulation is necessary for a home. The answer comes down to the recommended R-Value by location. What is R-Value and why is it so important? At Capitol Machine, we like to provide content that is helpful for insulation professionals and their customers. Here’s what you should tell homeowners about R-Value.

The Importance of R-Value

R-Value is a measure of an insulating material’s ability to resist heat flow. Insulation with higher R-values will have better thermal performance. Insulation’s performance is also dependent upon how and where it is installed. To achieve the optimal R-Value and get the most out of a home’s insulation, the type of insulation, thickness and density must all be taken into account.

What is the Recommended R-Value?

EPA's R-Value Insulation Zones By State

The amount of insulation a house needs differs depending on the “zone” of each state. The EPA has broken up the Unites States into eight zones. The DOE Zip Code Insulation Calculator also provides tailored information based on zip code for homeowners who would like to learn more about R-Value. Zone no. 1 represents the warmest climates, where the coldest fall into zone no. 8. View the EPA’s map and Recommended R-Values.

Recommended R-Values By Zones

What conversations have you had about R-Value with your customers? Share your experiences with us on social media and use this article as a guide the next time you are asked about the proper amount of insulation.