Residential doors are classified as either Exterior or Interior. Exterior doors include entry doors, patio doors, and accessory doors such as the door to the garage and kitchen or laundry room. Interior doors include bedroom doors, bathroom doors, closet doors, pantry doors and water heater doors.

Facts About Doors You Need To Know

The materials used for entry doors may consist of one of a variety of wood species such as fir, mahogany, alder, oak, poplar or cherry, or a composite material such as fiberglass. The materials used for patio doors, which are manufactured by window companies, are typically wood with an exterior cladding, vinyl or fiberglass, and an array of exterior and interior colors are available. Interior doors are typically made of wood, may be molded, and are available as either a solid core or a hollow core product.