Most people are up to date with R-values. Tend to be some how insulation and other components employeed to create the home's envelope are rated for resisting heat harm. But windows are different than insulation nestled between wall surfaces can remain. Windows let in light and let's see for. They interact with outside and inside air temperatures, sunlight and wind and they connect with us directly. Solar radiation (i.e., sunlight) also warms the windows specific framing even on cold winter days....Read Full Post »