LISA BERGERON, HOMEBUILDER MAGAZINE.
For as long as I can remember in the construction industry, the perception was that windows were the weakest link among building envelope thermal components. And in fact, they are-—no argument there. When you dissect a wall assembly into its components, windows do have the lowest R-values and can’t compete against insulation. This story, however, is not about competing with insulation; it’s about complementing insulation and finding opportunities to improve the whole wall effective R-values in ways that benefit builders, homeowners and the environment.