Knowing the difference between R- and U-values has a significant effect on your home’s coziness. These terms are essential for thermal comfort and help when selecting new windows. Make sure your home is adequately insulated while maximizing energy efficiency by familiarizing yourself with these terms.

Understanding R-Value & U-Value Windows

R-Value

R-value represents a material’s resistance to heat flow. This rating considers objects surrounding the glass, such as insulation and caulking, where it meets the building. Adding the scores of different construction materials will give you the R-value of a home or building.

U-Value

How much heat an object loses or gains is represented by a U-score. The value is the result of a scientific calculation gauging the energy efficiency of a door or window. Unlike R-value, U-ratings measure the thermal performance of an entire system instead of individual components.

Which Value Is Better?

A lower U-value means a higher R-rating. The former is best for understanding a window’s insulating capability. The latter is a lesser-known term that helps determine an area's resistance to heat transfer. This is excellent for defining the amount of insulation that drywall provides a home, but it is more complicated for windows.

Energy-efficient windows will provide ventilation while limiting unwanted air infiltration. These conflicting values require a U-score’s data regarding the transfer of energy via radiation and conduction, generally making it a better deciding factor. The limited scope of R-Values won’t offer the best data regarding thermal performance.

If you’re looking for energy-efficient windows, trust the professionals at Affordable Window & Glass in Florence, KY. Serving Northern Kentucky and Cincinnati for over 40 years, their specialists are skilled in a variety of projects, including window replacement, glass repair, and insulated glass. Visit their website for a look at services or call them at (859) 282-7787 with any questions.