Tips

What’s the difference between double-hung windows and single-hung windows?

They look the same but don’t function the same. Find out what sets these two window types apart, the benefits of each, and more need-to-know info that’ll help you select the right option.

You no doubt recognize these classic windows, even if you’re not familiar with what they’re called. Find out why you might choose a single-hung window over a double-hung window (or vice versa) — plus get the answers to your most frequently asked questions.

What’s the difference between double-hung windows and single-hung windows?

The short answer is that they function differently. Here’s what we mean:

A double-hung window has two openings. As expected, you can slide the bottom sash up and you can also slide the top sash down. Open just the bottom, just the top, or both ends at once. When both ends are open, it can enable something called circular ventilation — warm air vents out the top while cool air flows in from the bottom.
A single-hung window has one opening at the bottom. The lower sash slides up to open and the top sash doesn’t move (it’s fixed).

Talk like a pro: What’s a sash?

A sash is the glass and the members framing the glass. Both double-hung and single-hung windows have two vertically stacked sashes.

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100 Series Single-Hung Window

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100 Series Single-Hung Window

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What do double-hung and single-hung windows have in common?

Here's what these windows have in common:

They both have a timeless aesthetic that looks great on traditional homes — farmhouses, Colonials, Craftsman Bungalows, Cape Cods, and more.
They open flush to the wall, which makes them ideal next to patios, decks and anywhere else an outward-opening window would obstruct space.
Both are available in a range of options, so you can find a window that suits your needs in terms of aesthetics, performance, material type, and cost. Additionally, either window will work whether you’re building a new construction home, remodeling, or replacing — there's no wrong choice here! Find out about your options.

With their similar look, it’s easy to mix double-hung and single-hung windows throughout your home, choosing one over the other depending on your needs.

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200 Series Double-Hung Window

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200 Series Double-Hung Window

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What are the advantages of single-hung windows?

In general, single-hung windows are a great fit when you want a classic look and don't need or won’t use the top opening — for example, if it’ll be out of reach.

Here's what they offer over double-hung windows:

Energy efficiency: With fewer moving parts and features, single-hung windows can help reduce energy loss and improve savings on utility bills.
Extra peace of mind: 100 Series Single-Hung Windows latch automatically when closed making them a good option in a first-floor bedroom or anywhere else you never want to worry about remembering to lock the windows.
Lower price: A single-hung window is simpler to construct than a double-hung window. This is reflected in the price. Mixing single- and double-hung windows throughout your home will help you create a cohesive look at a lower price.

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100 Series Single-Hung Window

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100 Series Single-Hung Window

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What are the advantages of double-hung windows?

Enjoy the same classic aesthetic with a couple of great advantages. Here’s what double-hung windows have over single-hung windows:

More fresh air: Bring in lots of fresh air with these flexible windows. With two sashes that open at once, you can choose to open the top sash, bottom sash, or both. In a room with only one window, a double-hung is a great option because it will allow you to vent the hot air that’s risen to the top of the room out of the top opening while cooler air can flow in through the bottom opening.
Easier cleaning: Maintenance is easier on double-hung windows due to the tilt-wash option, which allows you to clean both the exterior and interior of the window from inside your home — skip the ladder! The tilt-wash feature is standard with double-hung windows across all our product lines.

Products Shown

A-Series Double-Hung Window

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A-Series Double-Hung Window

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What customization options are available for double-hung and single-hung windows?

From color to hardware and even sash sizing — your window selections can help you create a look that suits your home’s style. Here’s what you should know about various selections:

Finish

Whether you have your windows factory painted or stained, or your contractor does this work onsite to perfectly match your existing woodwork — color or stain are hugely impactful. Your interior and exterior window color don’t have to be the same either. Did you know that certain colors are associated with certain classic architectural styles? Find out what colors might further your home’s style in our Home Style Library.

Products Shown

A-Series Double-Hung Window

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A-Series Double-Hung Window

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Window shape

Single- and double-hung windows don’t have to be rectangular. You can get one of these windows with a round top — we call this shape Springline™. You’ll also find various arch shapes available as standard offerings. For the most flexibility in shapes, look to our E-Series product line. And if you’re leaning toward another product line, rest assured that the most popular Springline and arch shapes are available through various product lines.

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E-Series Double-Hung Window

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E-Series Double-Hung Window

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Sash style

This is likely a detail you haven’t considered before, but sash size can be varied so the top and bottom sashes have different heights. While it might seem very subtle, it’s a detail that can add a lot of historic charm, especially on certain traditional home styles, like Cape Cods, for example. A taller bottom sash and shorter top sash is called a cottage sash. We also offer reverse cottage sashes, which are exactly what you’d expect — a shorter bottom sash and longer top sash.

Products Shown

E-Series Double-Hung Window

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E-Series Double-Hung Window

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Hardware

From the style of the hardware to its finish, don’t overlook this detail! If you want the most traditional look, hardware with more detailing is just right — think curves, ridges, and similar flourishes. While more streamlined, low-profile hardware will suit a look that’s more modern or transitional — a contemporary take on traditional style. As for finishes, bright metals that contrast with the window and create a more pronounced look will feel more traditional. Finishes that blend in with the window feel more modern.

Are single-hung windows or double-hung windows better for a replacement?

Either a double-hung window or single-hung window could work well in a replacement scenario. Here are a few replacement options to know about:

100 Series Single-Hung Windows: Either the type of window used in a new construction home, or our 100 Series Single-Hung Insert Replacement Windows might work for your project. An insert replacement window can be installed when conditions are right and is a good option when you’re seeking minimal disruption as these windows can be installed without replacing trim.
400 Series Woodwright Double-Hung Window: Our best-selling 400 Series product line has a replacement offering that’s specially made for historic or traditional-style homes, the Woodwright Double-Hung Window has a wood interior and composite exterior made of our Fibrex® material. This means the wood can be painted or stained to match your existing woodwork while giving you a low-maintenance exterior.

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What’s the difference between double-hung windows and single-hung windows?