Approximately 15% of an average home’s wall space is comprised of windows, making them prime candidates for curb appeal enhancers and energy efficiency boosters. That said, it’s important to know what sets energy-savvy windows apart from ordinary windows. Let’s examine the anatomy of an energy-efficient window.

Examining the Anatomy of an Energy-Efficient Window

Your replacement windows contractor showcases the features of an energy-efficient window.


Glass, or glazing, is the most prominent part of your fenestration. Multiple-glazing windows are more energy-efficient compared to single-pane types. In this case, energy efficiency is measured by various categories. However, the three most significant values are Solar Heat Gain Coefficient (SHGC), R-value and U-value.

1. SHGC – refers to how much solar heat your windows gain from the sun. A low SHGC means less heat gained. However, it’s important to optimize SHGC. While it can provide sufficient indoor heat during winter, it can also lead to overheating during warmer months. Keep in mind that SHGC measurements can also apply to the entire window installation and not just the glazing.

2. R-Value – measures a window’s heat resistance. Windows with high R-value have better thermal insulating properties.

3. U-Value – is the rate in which heat escapes from any room. The U-factor should be low, as it indicates that your windows are doing a good job of keeping ideal interior temperature.

Framing Material

Air leaks and heat conduction are two of the most common problems encountered by windows. These issues can be addressed by choosing the right window frames made of quality and durable materials. You may choose from wood, composite, fiberglass, vinyl and many more. Each material has its advantages and drawbacks, so it helps to discuss your window frame options with your window replacement contractor.

Gas Fills

Multiple-paned windows are filled with non-toxic gases such as krypton and argon for better insulation. These gases are kept with the help of spacers. Spacers ensure the optimal distance between glass panes. Take note that some windows only use regular air, which is less efficient in insulating windows.

Knowing the parts of an energy-efficient window helps you achieve a beautiful home, minus the soaring energy bills. Better View Windows and More offers excellent products and services for your home improvement projects. You may call us at (757) 655-3017. We serve Norfolk and Virginia Beach, VA.