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The Difference Between Double-Hung and Single-Hung Windows

Double-hung and single-hung windows are commonly found in homes. Both types are installed in a vertical configuration and feature upper and lower sashes. They look similar too; the sash, or frame containing the window glass, can incorporate muntins or smaller segments that divide up the window. Both window types may seem similar from afar.


However, a single-hung window has only one moving sash on the bottom. The top sash is fixed and cannot move. On the other hand, a double-hung window has two—the top and bottom sashes both open and close vertically.

Here is a closer look at the differences between these two common types of windows:


In theory, single-hung windows are more resistant to weather conditions. They have fewer moving parts that can be exposed to the elements.


For this reason, these windows are less expensive than double-hung types. Installing a single-hung window generally costs 10% to 25% less than a double-hung window.1 But just because there is less hardware doesn’t mean you are sure to save all around. Expenses can differ depending on the material, style, and installation cost.


A single-hung window is suited for installation in tight spaces because it cannot open outward. This can work for a bathroom or small study, or to get a slight cross-breeze in a hallway or entryway. You can also get ample sunlight in for natural heat.

But the two sashes of double-hung windows maximize ventilation. You can open both panes and get cool air coming in from the bottom sash and warm air to exit your home through the top. Double-hung models also accommodate screens to keep bugs and dirt out, as well as window air conditioning units.


Many older windows are single-hung and not designed to today’s energy efficiency standards. Over time, materials may rot and joints may loosen, which can cause air leakage. Double-hung windows are sealed and provide ventilation at the same time. This reduces energy loss and the demand on your air conditioning and heating system.

Window World of Boston offers double-hung models with multi-chambered sashes and frames, improving thermal efficiency and further helping reduce your monthly energy bills.


Double-hung windows take the top spot in terms of safety. Since you can’t push them outwards, there’s less of a risk of operating them from inside, especially for children. They’re safe near decks and patios and can be securely locked to keep potential intruders away.


The exterior of a single-hung window is harder to clean, especially if you live on an upper floor. Exterior surfaces must be cleaned from the outside. The sashes of double-hung windows tilt. Therefore, you can access both sides of each sash from inside. Newer models are easy to maintain as well; just periodically inspect moving parts and lubricate them if necessary.

Shop for Double-Hung Windows with Window World of Boston

Our double-hung windows are manufactured with high-quality vinyl parts that are resistant to cracking, peeling, chipping, and warping. Special sealing and dual ventilator locks are included, while a sloped sill allows water to drain away from your home. Moisture, dust, and noise are kept out by a wind flap and bulb seal.

We also offer a wide range of options, including interior and exterior color choices, not to mention window styles including eyebrow, arch, gothic, and specially shaped windows as well as sliding, casement/awning, bay/bow, and garden windows. Call Window World of Boston in Shrewsbury, Pembroke, or Woburn to learn more or request a free estimate online.

Services We Offer
Window World of Boston has an A+ BBB Rating and offers industry-leading solutions for replacement windows, doors, siding and more. We follow through every job from start to completion while our friendly, knowledgeable staff is there to answer your questions and provide any level of customer support you need. Window World is committed to providing the highest customer satisfaction.
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