Residential Minimum Attic Height

6 inches for any habitable room in residential building.

Residential minimum attic height.

Attic area exceeds 30 square feet and minimum vertical height of 30 inches measured from the top of the ceiling framing members to the bottom of the roof framing members. The attic is typically left untouched by homeowners. 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. Minimum ceiling height in sunken slab of bath and w c.

In a stairway 2 0m measured vertically above the nosing line. If the attic space is smaller than these specs then an access hatch is not required. So let s say your attic has 200 square feet over which the ceiling is at least 5 feet high. For this transformation 50 to 60 of the attic space must maintain the standard ceiling height in australia which is 2 4 metres.

Minimum glazed area is required to equal or exceed 8 of the usable floor area. But in modern houses homeowners turned it into a habitable room either a bedroom or entertainment area. Risers shall not be less than 7 inches and not more than 12 inches in height. In an attic room with a sloping ceiling or projection below ceiling line or non habitable room or similar a height that does not unduly interfere with the proper functioning of the room or space.

Your window area must be. The clear width for stairways above the handrail height shall not be less than 17 inches and not less than 20 inches in width below the handrail. The minimum height from the surface of the floor to the ceiling or bottom of slab should be not less than 2 75m. For air conditioned rooms a height of not less than 2 4 m measured from the top of the floor to the lowest point of the air conditioning duct or the false ceiling should be provided.

Generally sunken slab for bath and w c is about 1 to 1 5 feet sunken below the slab. Headroom for stairways accessing a loft shall not be less than 6 feet 2 inches. Basements without habitable spaces and hallways shall have a minimum ceiling height of no less than 6 feet 8 inches. Room area is this case is calculated as the total floor space with walls at least 5 feet tall.