Lowes Doors and Windows

There are other common window types, often designated as windows for new construction.

Projection windows extend out from the house. A bow window is an assembly of three or more individual units positioned at slight angles — 10 degrees, for example — giving the appearance of a gentle outward arc. Bay windows are similar, but fit together at greater angles — 30 or 45 degrees, for example — and project further from the house.

Picture windows are fixed models designed to offer wide, unobstructed views and provide lots of light.

Casement windows are hinged on one end and pivot out for ventilation at the other end. They're easy to open and provide good air flow.

Awning windows have a top-hinged sash that tilts out from the bottom. The design of an awning window helps keep rain out when the window is open.

Skylights mount in the ceiling and may be fixed or operable. During the day, they function much like overhead light fixtures. Larger, traditional skylights need a direct connection between the ceiling and roof for installation. Smaller tubular skylights include a reflective tube that channels natural light through an attic space and to a diffuser in the ceiling, illuminating small spaces such as hallways or bathrooms. Their size allows them to work with any roof support type without cutting and reinforcing joists.

Storm windows reduce the flow of air into the home, providing an economical way to increase the energy efficiency of single-pane windows. The space between the storm window and the existing window acts as added insulation.