New Construction Windows vs Replacement Windows: Which Is Better?
How These Two Window Types Are Built Differently The biggest difference is not the glass, it is the way the window ties into the wall. New construction windows are meant for rough openings where the framing is exposed, which lets the crew fasten the unit with a nailing flange and build the weather barrier around it. Replacement windows are designed for projects where the old frame is still serviceable, so the installer removes the old sash and sets the new unit int