Types of Replacement Windows

The type of windows you choose can elevate your home’s curb appeal and add function. There are many shapes, styles and customizable options.

The most popular replacement windows include double hung, casement, awning and slider windows. The style you select depends on your architectural style, use and energy efficiency needs.


Single-hung windows are one of the most popular types of replacement windows, featuring a classic design that complements many architectural styles. Their simple operation and affordable price points make them an excellent choice for homeowners looking to upgrade their home without breaking the bank.

When it comes to single-hung windows, there are a few key components that determine their performance and functionality. First, the frame is constructed from durable materials like vinyl, aluminum or wood that can be stained or painted for customization and visual appeal.

Then, the sash is placed inside the frame and secured with glazing compounds and adhesives. Finally, the glass is inserted, and the window is sealed to ensure optimal weather resistance and energy efficiency. Single-hung windows only feature a movable bottom sash, which limits ventilation capabilities in comparison to double-hung windows. For this reason, they’re best suited for homes types of replacement windows that don’t require a lot of airflow. Additionally, they’re typically less expensive than double-hung windows and are easy to clean.


Often referred to as double windows, double hung replacement windows feature two operating sashes that can move up and down. The sashes can also tilt inward, making it easy to clean the interior and exterior of the window from inside your home. Double hung windows offer increased air flow and ventilation. They’re ideal for homes with second or third floor bedrooms or living spaces where hot air tends to rise and stay trapped.

Like single hung windows, double hung windows are available in a wide variety of frame materials, glass packages and color options. They’re a great option for any upper level in your home and are an excellent complement to picture windows. They allow cool, fresh air to enter your home through the bottom sash and warm air to escape through the top sash. This creates balanced ventilation and reduces drafts. They’re also easier to open and close than crank windows such as casement and awning windows.

Flush Flange

This style of replacement window carries a different name than the other two frame types, but it works in very similar ways. Also known as z-bar windows or flush fin windows, they’re ideal for homes with stucco frames because they don’t require the exterior to be removed.

These frames feature nailing fins that connect to the wall sheathing and insulate the space between the new window and existing frame. They’re also a good choice for homes with damaged wood frames, as the flange allows installers to repair the frame without removing it entirely.

A popular option for historic and traditional homes, these replacement windows allow homeowners to preserve their original frame and siding, even if they’re in poor condition. They’re also easy for professional installers to install because they don’t have to remove the existing frame, trim or siding like full-frame replacement windows do. Instead, they can simply fit the new window into the existing frame using heat-welded joints.


The main drawback of insert windows is that they cannot easily address issues like rot or leakage in the wall area. This is because insert replacement windows don’t involve removing the existing frame and installers can’t see what’s going on behind the existing window casing to fix problems as they arise. If not addressed, these problems could worsen over time, resulting in more expensive repairs in the future.

Also known as “frame-in-frame” replacement windows, this type of solution is ideal for homeowners who want to upgrade their existing home’s performance without sacrificing the integrity of the original window frames. In a pocket window installation, the old sash, operating hardware and cover are removed, but the existing frame remains in place as it is anchored, insulated and sealed around the new insert window. However, not all existing window openings are suitable for this installation method.

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