Single-Hung Windows

Q: What is the difference between single-hung and double-hung windows?

The difference between single-hung and double-hung windows is the number of sashes that move. A single-hung window has one fixed, or non-operable, sash and one operable, or moveable, sash. A double-hung window has two operable, or moveable, sashes.

Black double-hung window with two rectangular glass sashes and slim aluminum frame on white background

What is a Single-Hung Window?

tips_and_updates How it Works

A single-hung window has a single movable sash that slides up from the bottom, while the top sash stays stationary. When open, the two sashes overlap, requiring no additional space to ventilate.

location_automation Ideal Location

This maximizes space around the window, making it a popular choice in bedrooms and by high-traffic areas, such as a patio. Because the top sash does not operate, single-hung windows are also ideal in spaces where the upper sash is out of reach.

auto_awesome Design Style

Offering timeless style, these windows bring in natural light and fresh air. Given that the top sash is fixed, single-hung windows are very energy efficient and easy to operate. Discover more inspiration and information below.

Why Choose Single-Hung Windows?

Enhanced Security
Commonly Used in Bedrooms
Timeless Style

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Single-Hung Window Lines

Pella® Reserve™ - Traditional Single-Hung Windows
Pella® Reserve™ - Traditional Single-Hung Windows
- Made of wood
- Exquisite designs with historical detailing
- Authentic hardware
- Virtually unlimited customizations
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Pella® Impervia® Single-Hung Windows
Pella® Impervia® Single-Hung Windows
- Made of proprietary fiberglass
- Unmatched strength and lasting durability¹⁶
- Sleek, timeless style
- Exceptionally energy efficient
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Pella® 250 Series Single-Hung Windows
Pella® 250 Series Single-Hung Windows
- Made of low-maintenance vinyl
- Stronger, more durable frames than ordinary vinyl⁸
- Excellent energy efficiency
- Enhanced security and privacy
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Encompass by Pella® Single-Hung Windows
Encompass by Pella® Single-Hung Windows
- Made of easy-care vinyl
- Energy-efficient options
- Competitively Priced
- Increased comfort
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Pella® Hurricane Shield Series™ Single-Hung Windows
Pella® Hurricane Shield Series™ Single-Hung Windows
- Made of vinyl
- Options rated for all coastal areas, including HVHZ
- Exceptional everyday performance
- Engineered for precise installation
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Pella® Defender Series™ Single-Hung Windows
Pella® Defender Series™ Single-Hung Windows
- Made of vinyl
- Strong storm protection
- Excellent noise reduction
- Blocks nearly 100% of UV rays
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Single-Hung Window Inspiration

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Single-Hung Window Tips & Advice

Are you looking for tips and advice on how to care for your windows? Are you wondering how the shopping or replacement process works? Explore our collection of tips and advice articles to learn about all things windows.

See all Window Tips & Advice

Making Sense of Standard Window Sizes
Making Sense of Standard Window Sizes
This guide walks you through standard window sizes and why these common dimensions can be beneficial to use in your home.
Comparing Single-Hung vs. Double-Hung Windows
Comparing Single-Hung vs. Double-Hung Windows
Learn about what makes single-hung and double-hung windows unique.
Types of Windows
Types of Windows
Create a personalized look throughout your home with different window types. Pella offers multiple types of windows — each with their own unique style — so you can find the combination of windows that best suits you and your home.
How to Measure for Replacement Windows
How to Measure for Replacement Windows

Learn how to take initial measurements of your windows to help get a cost estimate for your project.

Single-Hung Window Frequently Asked Questions

Are double-hung windows more efficient than single-hung windows?

Single-hung windows are typically more energy efficient than double-hung windows because one of the sashes is sealed and stationary.

How do I clean a single-hung window from the inside?

On select product lines, the bottom sash of single-hung windows tilts in, making it easy to clean both the interior and exterior surfaces from inside the home. Since the top sash is stationary, the exterior surface of the upper half will need to be cleaned from outside the home. View step-by-step cleaning instructions in this video.

How do single-hung windows open?

Single-hung windows have a fixed sash on top with a bottom sash that slides up and down to open and close the window.

Why should I use single-hung windows?

Because only one sash is moveable on a single-hung windows, they are great for homeowners who are looking for potential cost savings replacing multiple windows and for replacement on the first floor of a home. Single-hung windows can be slightly more efficient than double-hung windows, as there are fewer moving parts which reduces the opportunity for air infiltration. To learn more about what makes single-hung windows unique, check out this article.

What are sash windows?

The sash is the moveable part of a window made up of the vertical and horizontal frame that holds the glass. Single-hung windows are also known as single-sash windows, while double-hung windows are commonly referred to as double-sash windows. Learn more about the differences between single-hung and double-hung windows.

What is the difference between single-hung and double-hung windows?

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