Bright Views, Better Efficiency: Upgrading Your Home with Energy-Saving Windows

Did you know that energy-efficient window replacements are among the best home upgrades to improve your home’s value and curb appeal?

Installing new windows can provide as much as a 75% return on investment when you sell your home. However, they also help accent views, bring in more natural light and help pay for themselves through energy savings.

Here we look at upgrading your home with energy-saving windows and why they are such a smart investment.

What are Energy Saving Windows?

Energy-saving windows are durable windows that help keep interior home temperatures comfortable.

As a result, you are less likely to waste energy turning up the heat or AC, providing improved efficiency. Energy-efficient windows are Energy Star certified and built with the most energy-efficient materials and construction, including:

• The frame materials
• The glazing or glass features
• Gas fills and spacers

You can review the National Fenestration Rating Council (NFRC) label on windows to compare energy efficiency. ENERGY STAR-certified windows require a maximum U-factor of 1.22 W/m2K and a minimum ER of 34. When selecting windows in Illinois, aim for a U-factor of 1.4 W/m2K or lower and an ER (solar gain effect of the window) of 29 or higher

Choosing Your Energy Saving Windows

Here’s what to look for when shopping for energy-saving windows:

Frames and Sash

Aluminum/metal: These windows tend to have the worst insulating material as they conduct temperatures much faster. If you are only interested in metal frames, be sure they have what is called a “thermal break” between the inside and outside of the frame and sash, as it acts as an insulator.

Composite: Composite frames are very stable, offering the same or better thermal properties as wood. However, they are also resistant to moisture to prevent rot and decay and require much less maintenance, making them a better choice than their natural material counterparts.

Fiberglass and vinyl: Both materials offer superior thermal performance and can be purchased with filled cavities for additional insulation. They are also low maintenance, making them the best choice overall.

Wood: Despite relatively good insulation, the high maintenance of wood makes them less desirable.

Glazing/Glass

Insulation: Insulating glass usually has two or three panes filled with argon or krypton gas to improve energy efficiency. While three panes are more energy efficient, they are also more costly.

Type of glass: Low-e glass has an invisible metallic coating to block radiant heat transfer and regulate home temperatures. They reduce energy loss by as much as 30% to 50%.

Spectrally selective coatings: Some low-e window glazing is “spectrally selective” and can filter out 40% to 70% of the heat normally transmitted through insulated windows. However, they are also more expensive.

Spacers

Spacers between glazing layers should be about .5” between panes. However, because krypton gas tends to be more effective, the spacing is usually about .25”. Also, look for “warm edge” spacers, as they help lower the U-factor and reduce condensation.

The Importance of Window Operation

The style of window operation also affects energy efficiency because it impacts air leakage:

• Fixed: Because these windows don’t open, they are the most airtight and energy efficient, but only when they are installed properly.
• Awning, hopper, and casement: These hinged windows vary on how they open, with awnings hinged on the top, hoppers hinged on the bottom, and casements hinged on the side. The hinges help improve the seal as the windows close with the sash pressing against the frame.
• Single- and double-sliding: These windows slide open horizontally and tend to have higher air leakage rates than hinged and fixed windows.

You can use our guide to help source the most energy-efficient windows for your home.

The Len Roofing & Remodeling Difference

When we say that we’re a top-quality home remodeling and roofing company that serves the North Shore and surrounding Chicagoland area, we back it up. We do more than simply cover the basics: we show up on time and nail it. For more information or to schedule a consultation, call 847-768-6000 or visit our contact page.