What Does The R-Value Mean When It Comes To Your Overhead Door

Common Questions, General

Whether you’re a homeowner or a business owner who is trying to save energy costs, if you have a garage door or overhead door, it’s important to understand what the R-value is and what it means.

By definition, the R-value is a measure of resistance to heat flow through a given thickness of material. The higher the R-value, the greater the resistance. To be clear, you want a high R-value when looking for a quality insulated door.

Overhead Door Company sells and installs overhead doors that lead the industry when it comes to superior insulation and performance. We’ll outline some of our top performers and their features for both homeowners (residential garage doors) and business owners (commercial doors).

Residential Garage Doors

Whether your garage is heated, air conditioned or not, a well-insulated door can keep the garage room temperature comfortable which is ideal if it functions as a workshop or other livable space. They also operate more quietly, provide added strength and have a more aesthetic appeal on the interior than a non-insulated door. Here are some of our top choices for insulated garage doors:


For premium construction and maximum thermal efficiency, a Thermacore® insulated steel door is the ideal choice. This series of doors feature our sandwich construction of steel-polyurethane-steel as well as between-section seals with thermal breaks to reduce air infiltration. With several panel designs to choose from, these doors offer design flexibility, durability and thermal efficiency that will help keep your home comfortable. This garage door has an R-value of up to 17.5.

Courtyard Collection

Our Courtyard Collection features an insulated steel construction, and is fashioned to resemble the elegant wood designs of traditional carriage house doors. The result is you have the beauty of wood, and the durability of steel. These classic designs enhance the architectural beauty of your home. The Courtyard Collection has an R-value of up to 12.76.

Carriage House Collection

The Carriage House Collection combines the beauty of a wood carriage-house door with the durability of steel. These doors combine distinctive carriage house designs and superior insulated steel construction to create a harmonious blend of elegance and strength. You can customize the look by selecting from several paint or stain options, window styles and decorative hardware. The Carriage House Collection has an R-value of 10.

Commercial Garage Door

Advanced Performance Sectional Steel Doors

This commercial door is the solution for advanced performance in commercial and industrial applications where climate control, durability and ease of maintenance are primary concerns. This door system presents the most advanced thermal performance values published by any major U.S. manufacturer of a 3″ commercial insulated sectional door. It has an R-value of 26.

Thermacore® Sectional Steel Doors

This is a premier insulated sectional steel door, which is ideal for applications that demand the highest levels of thermal efficiency. It features an R-value of up to 26 combined with minimized air infiltration provides for superior thermal performance. It has thermal breaks to prevent cold or heat from passing through the sections. It also has a flexible bottom weather seal with a retainer, which lessens conductivity of heat and cold, minimizes air and water penetration, and accommodates irregular floor conditions. Lastly, it has a baked-on, polyester paint finish that eliminates field painting and provides long-lasting protection against the elements.

If you are interested in receiving a quote for a new door for your home or business, completed the Request A Free Estimate form, call or visit your nearest overhead door showroom!


"Brandon and crew were very easy to work with. Doors were put in in a timely manner and everything was cleaned up when done. Would definitely recommend to anyone."
- Jane Heiny
5 Stars
"Everyone from the salesman to the tech that installed the equipment were very professional. Great job!"
- Jason Brown
5 Stars
"I’m very pleased with the work done, and in a timely manner. The guys were friendly, answered all my questions, and left the property cleaned up. I love the quiet door movement."
- Lorna Thompson
5 Stars

"Excellent service very friendly and knowledgeable high quality. love our doors thanks overhead doors!!!!!"
- Dianna Weaver
5 Stars

"I’ve had nothing but pleasant experiences! The individuals on the other end of the phone are always so kind and organized. We have received quick service twice and have been so pleased with the level of professionalism and courtesy shown by technicians. Great and honest company!"
- Olivia Hildebrand
5 Stars
"Torsion spring broke on my garage door. Called Overhead Door and spoke with Brandon. He scheduled the techs for the next day which they came out and replaced both torsion springs on the door and adjusted the door so it worked perfectly!! The technicians were very knowledgeable and experienced and had the new springs installed very quickly. Great job!!"
- Dale Rogers
5 Stars
"Very professional! Completed the repairs in an hour and gave the rest of the unit a checkup. Would definitely give them my business again. "
- James Edmonson
5 Stars
"Had a very good overall experience. They arrived within one hour of my request for a quote and provided a written formal quote an hour later.They arrived on time, completed the job in a couple of hours and left the garage spotless. Very professional installers. Highly recommended!"
- Bruce Costigan
5 Stars
"HI called them and they were extremely friendly and made you feel comfortable. I told him my problems and he knew what was wrong. They scheduled me for the next day and they came when they said they would. The two men that came were very professional. Upbeat and knew their job. The job took them 15 minutes. They oiled everything up. (above and beyond) I will use them again I hope I don’t have the need anytime soon. But I would recommend them highly."
- Yvonne Berryman
5 Stars
"The technician did a very nice job replacing the springs. He was very proficient in his work. He also shared ideas for lubricants for maintaining the opener."
- Paul Johnson
5 Stars
"I called on Friday at 11am with a broken garage door spring. I was told the soonest they would be able to get to me was early the following week. By 3:00 p.m. Friday afternoon to my surprise they arrived and fixed the spring. I had a very positive experience recommend them!!"
- Chris Beaver
5 Stars
"Workers were friendly and did good work."
- Robert Hanson
5 Stars
"We and a non-emergent problem with our door. They were there the same day."
- Phillip Blake
5 Stars

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Overhead Door Company - Mason City, IA

Overhead Door Company of Mason City™, Overhead Door Company of Albert Lea™ and Overhead Door Company of Olmsted County™ proudly serves customers in each nine-county area and beyond.

OVERHEAD DOOR COMPANY OF MASON CITY™: Floyd, Cerro Gordo, Howard, Winnebago, Winneshiek, Butler, Hancock, Bremer, Kossuth, Chickasaw, Mitchell, Palo Alto, Franklin, Worth, Wright

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