What is an R-value and how important is it?
“R” stands for resistance. The higher the “R” factors, the better the insulation characteristics. The “R” value of a windows frame and glass is very important since it directly relates to how well the window will reduce energy consumption. A higher R-Value will perform better in reducing energy costs than a lower R-Value. In fact, you do more to reduce heat loss by switching from an R-2 glass (like in a double pane window) to R-4 glass, than by raising the insulation value of an equal area of R-11 wall all the way up to an R-100!
