Don T Replace Those Old Windows Before You Try Window Inserts
As a committed Treehugger, one of the most important goals of my recent house renovation was to reduce energy consumption per person. The first thing many people do in a renovation is replace all the windows, even though study after study have shown that it has just about the worst bang for the buck of anything you can do. It also doesn’t even make that much difference; a single-paned window has an R value of perhaps 1 and a new double-glazed window is between 2 and 4 unless you go very, very expensive....