What R-value Means for Insulation and Why It’s Important

Quality insulation is crucial for a comfortable and energy-efficient home. Insulation serves as a thermal barrier that slows down the movement of heat through convection and conduction and sometimes radiation. During hot weather, the layers of insulation in the walls and the attic prevent excess heat from seeping inside, making it easier to cool your house and lessen the burden on your AC. During cold weather, insulation keeps heat trapped inside, and your heating system won’t have to strain continually to replace the warmth escaping to the outdoors.

But simply having insulation in your home isn’t enough: it must be properly installed, and it must be the right type. One important piece of information to have about insulation is its “R-value,” which plays a huge role in whether the insulation is right for the job or not.

Trust professionals like those at J & W Heating and Air for your insulation in Orange Park, FL and you will always receive the correct R-value insulation, installed correctly.

So just what is R-value?

R-value is a measure of how much resistance a piece of insulation creates against the movement of heat through conduction: in rough terms, R-value is how “good” insulation is at creating a heat barrier.

The R-value of insulation is determined through laboratory tests, and run through the following formula: temperature difference x area x length of exposure divided by heat loss. The resulting integer is the R-value; the higher the number, the more effective the insulation at slowing the heat transfer. A typical R-value for fiberglass insulation is R-19.

It’s important to know that high R-value doesn’t necessarily mean that the insulation will do the best job for your home. For one thing, R-value does not measure how well the insulation blocks heat movement through convection or radiation, only conduction. Then there is the issue of installation, since the highest R-value available is no good if the installer placed it poorly and left areas where heat is still able to escape or enter. Insulation that is compressed or crushed also loses most of its R-value, and if the insulation isn’t the right type for the section of the house it is supposed to heat-shield, the R-value will again be of little use.

Professional insulation installers are skilled at balancing R-value with other factors to make sure that a home has the proper barrier against heat that will keep it cooled down in summer and warm in winter. Our insulation experts at J & W Heating and Air use a variety of types of insulation, such as bats and blown-in insulation (excellent for filling in oddly shaped spaces). They can survey your house and make sure that it receives the ideal insulation in Orange Park, FL for all seasons. Contact us today to set up an appointment with one of our insulation specialists.

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J & W Heating and Air
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Stacy Russell
Stacy Russell
15:10 02 Jun 20
I will be recommending J&W to my friends and family. They were very professional and on time. Did a very well job in... a quality manner. Dustin, Mark, and Robert. Worked very well together and was in and out with no cleanup for me to do. Thanks so much for getting my home back to a cool environment.read more
Phillip Wallace
Phillip Wallace
13:46 27 May 20
Just had an entirely new, full HVAC install done at our old house in Riverside, which was a fairly big job. Brian and... Will did the installation, and were awesome. There was going to be issues leveling the air handler in the attic, so they moved it to a new spot and hung it instead, getting new parts/changing the plan on the fly. We're much happier with this new setup and location of the air handler. I really appreciated this, their professionalism/thoroughness, and flexibility. Brian and Will worked super-hard, and double-checked everything once the job was done. Would use this company again.read more
Louis Kincheloe
Louis Kincheloe
21:18 01 May 20
Two installers here early this morning. Worked all day. Very professional, extremely well mannered and quick to answer... all my questions. They are Dustin and Robert. Both men went above just installing my new unit, they were personable and knowledgeable in what they were doing. I was surprised when I found out these two hadn't been working that long together. They worked extremely well together. I highly recommend this two men.read more
Shirley Davis-So Brooks
Shirley Davis-So Brooks
18:10 01 Jun 18
Very pleased with installation of York A/C Heating unit. Jason Bottoms and Jason Flatearth were professional, ... arrived on time and completed the job in a timely manner. The unit looks great. They upgraded and repaired everything that needed it. Great Job.read more
James Ponciano
James Ponciano
22:46 03 May 18
A snake crawled into my outdoor condenser and stopped my 16 year old Trane last week on Thursday. The power surge took... out my blower unit circuit board and the motor. I called J&W and Rob was over within two hours of my call. I was spec'd a new York 17 seer system and it was up and running on Monday. Technicians Jason and Brian arrived promptly and every facet of the installation was thorough. When completed, I would not of even known they were there except they left my garage cleaner! Thanks J&W!read more
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