Bay windows usually consist of a picture window with two other (usually smaller) windows on each side, typically double-hung windows, or casement windows. Bay windows allow light to enter at different angles, and most bays include side windows that can be opened for airflow.  A bow window usually consists of four or five windows with more of a curved structure creating a rounded appearance on the outside of the home. A bow window does not protrude as far as a bay window does.

The main difference between the two is the outer layer of the door; a steel door has a steel exterior, and a fiberglass door has a fiberglass exterior. Both units are insulated and thermally broken, although steel may be colder to the touch. Fiberglass doors also have a very realistic appearance with wood texture and often will be mistaken for a real wood door. Fiberglass also offers different wood texture species like Oak, Cherry, Fir, Mahogany grains.

The difference between French doors and sliding patio doors is the way they open. French doors are double doors that swing on hinges, while sliding patio doors slide on a track with brass rollers. Patio doors save space while French doors open inward and need space to operate.

The difference between French doors and sliding patio doors is the way they open. French doors are double doors that swing on hinges, while sliding patio doors slide on a track with brass rollers. Patio doors save space while French doors open inward and need space to operate.