Are Double-Hung Windows More Efficient Than Casement Windows?

Are Double-Hung Windows More Efficient Than Casement Windows?

Choosing the right windows for your home can feel like missing pieces to the larger puzzle. There are many different styles of windows that you might not be completely familiar with when you begin your search. In this article, we will discuss the differences between two window styles— double-hung windows and casement windows. By they end you'll be familiar with differences in the window style and energy efficiency so you can decide if either option will meet your window needs.

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Double-Hung Windows vs. Casement Windows

Double-hung windows are vertically-oriented windows that have two sliding sashes. The bottom sash can slide upward, typically over front of the upper sash. The top sash can then slide down behind part of the bottom sash. There are also single-hung windows that only have one sash that can move up and down, typically the bottom one. Both single- and double-hung windows are included in some of the most popular window types to be installed in modern homes.

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Casement windows have surprisingly been around for a lot longer than double-hung windows and are considered more of a classic, the sash window. Most homes have more hung windows but more and more homeowners are choosing casement windows. They work by moving outward from a hinged side of the window. Like hung windows, casement windows can be ordered as individual standalone units or they can be made in multi-window units. It's common to see single casements, double-casements, or casement-picture-casement combinations. This style is typically opened by a rotating crank, some are designed to open by push.

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Are Double-Hung Windows More Energy Efficient Than Casement Windows?

Double-hung windows are not more energy-efficient than casement windows. Casement windows have a single seal that runs along the perimeter of the window sash. When these windows are closed, the entire window sash seals tightly against the frame. Locking that window into place creates a weathertight seal that prevents air from getting through around the edges.

Should I Get Double-Hung or Casement Windows for My Home?

If you have to make a choice between double-hung and casement windows you should know more about the advantages and challenges of each style. We'll talk more about that next in the Pros and Cons section.

Pros and Cons of Double-Hung Windows

Although double-hung windows aren't the most energy-efficient style, there are some positive facets to them when considering them for the home. Also remember that there are ways to improve the energy performance of any window and style is not the only factor used to determine a window's energy ratings. 

Pros of Double-Hung Windows
  • Double-hung windows are one of the most economic options.
  • Since these windows are so common, many vendors are able to offer many customization options.
  • Windows that have two sashes allow increased ventilation— you can control ventilation by lifting and lowering the upper and lower sashes.
  • Many double-hung windows have tilt-in sashes which make cleaning the surface of the window easier.
Cons of Double-Hung Windows
  • These windows are one of the least energy-efficient options on the market.
  • The sash around the outside, especially the bottom, collects dirt quickly, impeding the closure.
  • You cannot replace only one part of the window, but if one section breaks, the entire window needs replacing.

Pros and Cons of Casement Windows

Casement windows might be more energy-efficient, but there are also some downsides to them if you are considering all of the angles.

Pros of Casement Windows
  • Since the entire casement window can open, it allows a larger portal to ventilate a room.
  • Casement windows can close completely against the window sash maintaining its energy-efficiency.
  • Maintaining these windows when they are a single window pane is more convenient.
Cons of Casement Windows
  • Hardware on casement windows may need more maintenance than that on double-hung windows.
  • Casement windows are generally more expensive than double-hung windows.
  • They often have a small range of sizes.

Deciding between windows can be a difficult, but when you have a pros and cons list laid out in front of you, it can make it easier.


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