The minimum cost to replace a window is $1,000. Materials are a major cost driver. Wood frames for the window require regular maintenance. Aluminum frames are prone to denting. Fiberglass can offer better efficiency, but the material leaves little room for customization. The best frame material is vinyl. It’s the most common type of frame. It offers moisture resistance, energy efficiency, and superior warranty.
For the glass itself, a single pane is the easiest to break and the least energy efficient. Double pane windows are up to 31% more energy efficient than single pane windows. Triple pane brings that number up to 48%. Of course, additional panes require more glass, which can be more expensive.
On the outer layer of glass, window coatings can be an extra upfront expense that pays off in the long run. Some coatings reduce up to 70% of solar heat gain, lowering AC bills.