What is an R-Value?


One of the first things a homeowner should inquire about when considering options for windows is the R-value. The R-value is an specified number that comes from a standard testing procedure to evaluate a material’s “resistance to conductive heat transfer”. The greater the R-value, the greater a window’s resistance to conductive heat transfer. R-value is the standard measurement of thermal efficiency. The greater the R-value, the larger the insulating qualities. This number shows how likely the window is to lose heat. An R-value of 1 is considered inefficient, while an R-value of 2 or greater is normal for insulating glass. FAS Windows and Doors offers with a broad range of products with R-values that can satisfy your thermal efficiency needs.

It’s important to keep your environment in mind while scoping out R-values. Educating yourself about your environment and your personal window or door needs is the greatest way to ensure that you get what you want during the replacement or upgrading process.

For more information regarding FAS Windows and Doors’ products, contact FAS Windows & Doors at 1-888-422-1960. If you have any questions you’d like to submit online, you can always ask our FAS expert! Call us today to schedule your FREE in-home estimate!

Katie Pettit 9/28/2010