What are U and R Values & How Do They Relate To Window Insulation?

One way that insulation is created is with dead-air space between panes of glass. That's why a double-paned window gives more insulation than a single-paned one. Other factors contribute to the insulation qualities of a window, such as the gasket, the material type, and the gas used in a gas-filled window. The U/R value tells how the product insulates. It is a formula derived from the efficiency of the product, and that formula takes into account many of the factors just mentioned. A good R measurement is a high one, while a good U measurement is low since U is the reciprocal of the R. Homeowners are more interested in the R value, while builders are interested in the U value.

For more information on a specific window model's U and R values, stop by one of The Window Man' three Northern Virginia showrooms or call us at 703-978-9888.