> Who replaces their windows and doors every 20 years? Do modern windows even last that long? From observation of my own and relatives' houses, and from lookin

> Who replaces their windows and doors every 20 years? Do modern windows even last that long? From observation of my own and relatives' houses, and from looking at houses when buying, most lose their seal by 15-20 years—so, efficiency goes way down because the gap between the panes is breached, they fog and collect moisture, et c. Replacing is so cheap that even minor problems aren't considered for repair, as labor's similar either way. "I could charge you $400 to fix this, or $500 to replace it, and the newer ones are slightly more energy efficient, and this one'll probably develop more problems soonish. UV/IR coating on this is torn up anyway, those things rarely last more than a few years, especially with young kids or pets, kind of a joke. Give you a deal—say, $2250—if you just wanna do all 5 on this side of the house so they don't look different, and to get ahead of problems on the others". That kind of thing.