Residential & Commercial | Bonded & Insured

Serving All Areas In North Carolina

Sealed Crawl Space Encapsulation, Insulation Installation, Radon Mitigation & Spray Foam

Residential & Commercial | Bonded & Insured

Serving All Areas In North Carolina

R-Value Matters

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What is R-value?

It is the resistance of heat transfer through the insulation. Higher R-value equals higher performance insulation. Well insulated homes get you more savings on your heating and cooling bills. 


There are a few different ways to measure. Contractor Tom Silva of This Old House explains that to calculate the R-value of existing insulation, you can measure it with a tape measure. It needs to touch the ceiling board to get the height. As a rule of thumb, for most insulation types such as fiberglass and cellulose, every inch of insulation is roughly equal to a 3.5.


We give recommendations based on where you are geographically located. In the southern region of the US, contractors use a lower R-value of 30, whereas colder, northern states typically use an R-value closer to 49.

No matter whether a type of insulation is thick or thin, the value could be the same. Blown-in (or loose-fill) insulation has the lowest R-value per inch compared to insulation blankets and spray foam insulation. Foam board insulation has the highest per inch. 

Contact Us Now


If you would like to have your basement or attic reinsulated with a more effective option, give us a call. Our number is (919) 453-6411. Your home or commercial building will be well insulated to ensure cool temperatures indoors in the summer weather and warmth indoors during the colder months. 

Attention Builders: