Minimum Attic Height

Attic furnace passageway minimum dimensions requirements.

Minimum attic height.

Minimum vertical height of 30 inches measured from the top of the ceiling framing members to the bottom of the roof framing members. To extend old eight foot ceilings in a remodel aim for. The rest can be less than 7 feet. At least 50 of the usable floor space should have a ceiling height of 7 5 ft.

The 2012 international residential code requires an attic access opening for attics with an area greater than 30 square feet and a vertical height in excess of 30 inches. Living areas and hallways must have a ceiling height of 7 feet or more and bathrooms and laundry rooms must be at least 6 feet 8 inches tall. Have a minimum opening width of at least 20 inches. The minimum ceiling height in rooms with sloped ceilings such as a finished attic space is 7 feet over at least 50 percent of the room area.

If the attic space is smaller than these specs then an access hatch is not required. Summary of residential ceiling heights therefore in summary lets is recap the above information. At least 50 of the usable area calculated above must have ceilings of at least 7 feet. Attic area exceeds 30 square feet and.

Local codes may have stricter requirements so again be sure to check with your state and local regulations. If a room has a sloping ceiling which is common in attics at least 50 percent of the room area must have a 7 foot ceiling. The rough framed opening. To prevent homeowners from creating living space that does not allow occupants to stand up.

Have a minimum opening height of at least 24 inches. For new flat coffered tray or sloped ceilings go for a minimum of nine feet. Here s how to choose a ceiling height that s right for you. In other words if your attic has 200 square feet over which the ceiling is at least 5 feet.

The minimum ceiling height to beams girders ducts or other obstructions shall be no less than 6 feet 4 inches from the finished floor.