How are exterior windows typically installed?

Exterior windows are typically installed in a framed rough opening. This installation method ensures that the window is properly supported and aligned with the structure of the building. A framed rough opening provides the necessary structural integrity and clearance for the window, allowing for adjustments if necessary. The framework is made of wood or metal studs that create a solid rectangular opening where the window unit can be securely seated.

Using a framed rough opening accommodates the window's size and allows for weatherproofing materials, such as flashing and insulation, to be effectively applied around the window unit to prevent water infiltration and enhance energy efficiency. This method is also common because it allows for easier installation of the window and ensures a snug fit, reducing the risk of air leaks.

In contrast, options such as a flat rough opening, recessed cavity, or cantilevered design might not provide the proper support or alignment necessary for a durable window installation. A flat rough opening lacks the framing structure that ensures stability and fit, while a recessed cavity would not typically accommodate standard window sizing and could create complications. A cantilevered design is primarily associated with structural support or aesthetics in building design rather than the method of window installation.