When choosing windows for your home, every homeowner wants to make the right decision. As a big purchase, it’s only natural to feel overwhelmed by the variety of choices you’re met with when window shopping. Many homeowners feel unsure about the decision between single-hung and double-hung windows and their energy efficiency. Single-hung windows have only a bottom sash that moves, whereas double-hung windows offer an operational top and bottom sash.

Which is more energy-efficient: single-hung or double-hung windows? This guide has compiled the basics to help you make the best decision for your home. Here’s what you need to know about comparing the energy efficiency of single-hung vs. double-hung windows. 

Which is More Energy-Efficient: Single-Hung or Double-Hung Windows?

Generally, single-hung windows are considered more energy efficient because the top sash does not move. This means there’s less chance of air filtration. 

However, advancements in energy-efficient window features have made double-hung windows nearly as energy-efficient as single-hung windows. For most customers, double-hung windows’ ease of use and functionality make them a better choice. Some modern features of energy-efficient windows include:

Spacers and Seals

Spacers and sealing systems reduce the likelihood of condensation and air infiltration and ensure proper spacing of glass panes in double- and triple-pane windows. At SoftLite, we use either SuperSpacers or stainless steel spacers. Both types of spacers help with energy efficiency. Our unique designs feature air and water barriers and between 360-600” of dual- or triple-fin weatherstripping around the various perimeters to minimize air infiltration.

Low-E Coatings and Number of Glass Panes

Low-emissivity (Low-E) coatings help redirect heat away from the window, promoting enhanced energy efficiency. Microscopic, metal, or metallic oxide layers that keep heat inside during the cold months and outside in the warm months. SoftLite offers varying levels of Low-E coatings for protection against solar heat, depending on your climate region.

Double or triple glass panes also provide insulation and will have greater energy efficiency than single-pane windows. We also offer different types of glass in varying strengths.

Gas Between Panes

The gas used between window panes can also help improve thermal insulation efficiency. SoftLite uses argon gas to help enhance the energy efficiency of our windows. These odorless, colorless, and non-toxic gasses aren’t harmful. The greater density makes it less thermally conductive than air.

Frame Material

The material of the window frame also plays a role in the energy efficiency of a window. For example, you can choose wood, aluminum, fiberglass, composite, or vinyl for your window frame. Vinyl material is a popular option, as it’s a high-performing insulator and tends to be more energy-efficient than wood or metal window frames. 

Insulating Foam 

Many SoftLite window models also offer insulating foam in the frames and sashes. This expanding foam fills the chambers to enhance energy value and makes your home more comfortable. In addition, our double-hung windows have improved sash-locking mechanisms that help eliminate gaps and decrease air infiltration.

Choosing Single- vs. Double-Hung Windows

Have you finally decided between single- vs double-hung windows for your home?

SoftLite offers a great selection of double-hung windows. We offer some of the most energy-efficient and highest-performing double-hung windows in the industry.

Additionally, our window dealers can help discuss your specific window needs and guide you in deciding between single-hung vs. double-hung windows. Find a SoftLite Dealer near you today to start shopping for your energy-efficient windows.