Casement windows were first introduced by Andersen Windows in 1932. They differ from the traditional single-hung or double-hung window in that they are opened on a hinge at the side of the frame using a slide or a crank. Advantages of casement windows are the unbroken view they provide and the ease of cleaning. Modern casement windows use the latest advances in window materials and manufacturing methods and are highly energy-efficient. They are popular as replacements for double-hung windows and in combination with picture windows or bay windows.
Frame materials, colors and glass options
Because of the way casement windows operate, heavy-duty frames work best to create a leak-proof seal when closed. Vinyl, aluminum, wood, and composite are the most popular frame materials. For frames that require little maintenance and resist chipping, fading, and warping, vinyl and aluminum are popular choices. However, wood frames are heavy-duty and elegant. Their drawback is they require maintenance and periodic painting. Composite frames have the advantages of wood with better resistance to weather damage. Wood and composite frames can be painted or stained to match or complement your home's color scheme. Vinyl and aluminum frames now come in an assortment of colors beyond black or white. Most manufacturers carry a range of standard colors, with optional colors available at additional cost. Depending on your regional climate, the glass in your casement windows can be ordered in single, double or even triple panes. Other glass options include low-emissivity coatings and inert gases between the panes for improved energy-efficiency.
Rating your window's energy-efficiency
The basic design of casement windows uses compression seals to ensure no air leakage when the window is closed. However, the frame material and glass options also affect the overall energy efficiency of your windows. When shopping for your windows, you should be familiar with the ratings that are used to measure a window's performance, as well as the following terms:
- NFRC ratings: the National Fenestration Rating Council is an industry body that rates window performance. An NFRC label on a window certifies that it will perform as advertised
- Energy Star: a U.S. government certification program for a variety of products. Energy Star windows may qualify you for tax rebates
- R-Value: a measure of a window's heat loss performance. The higher the R-Value, the lower the heat loss
- U-Value: measure of the rate of heat transfer through the entire window. A U-value of 0.35 or lower signifies an energy-efficient window
Optional items that can improve a casement window's energy efficiency are low-e coatings and inert gases such as argon between the panes of a double or triple-paned window. Low-e coatings applied to the outside window surface keep heat out in hot climates; applied to the inside surface, they help retain inside heat in cold climates.
Popular manufacturers, costs
Andersen is the originator and best-known manufacturer of casement windows. Other notable manufacturers include Atrium, Certainteed, Jeld-Wen, Mildgard, Pella, and more. Smaller casement windows start at around $300, and prices increase according to size, materials, and manufacturer.
Buying casement windows
Use the form on this page to begin your search for the right windows for your home. Manufacturers' websites, dealer showrooms, and home improvement stores are also good sources of information. In order to get accurate quotes, know your window measurements and factor in options, installation, shipping, and taxes.