If you have been shopping for replacement windows for your home or are considering a more extensive remodeling project, you have likely seen the R-value and U-value advertised, but what are these ratings and what do they mean? Unless you are a contractor or well-versed in construction terminology, these numbers are probably useless to you without explanation.
In the sections below, we’ll explain what both the R-value and U-value are and why they are important when you are shopping for windows.