Residential Minimum Attic Height

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.

Residential minimum attic height.

For this transformation 50 to 60 of the attic space must maintain the standard ceiling height in australia which is 2 4 metres. The minimum height from the surface of the floor to the ceiling or bottom of slab should be not less than 2 75m. Generally sunken slab for bath and w c is about 1 to 1 5 feet sunken below the slab. 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 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. Room area is this case is calculated as the total floor space with walls at least 5 feet tall. Headroom for stairways accessing a loft shall not be less than 6 feet 2 inches.

But in modern houses homeowners turned it into a habitable room either a bedroom or entertainment area. In a stairway 2 0m measured vertically above the nosing line. The attic is typically left untouched by homeowners. Risers shall not be less than 7 inches and not more than 12 inches in height.

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. Therefore from the above fact we can conclude that the minimum ceiling height should at l east 9 ft. 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.

Minimum glazed area is required to equal or exceed 8 of the usable floor area. More than 50 of the ceiling space should be on average a minimum height. Minimum ceiling height for basements with no habitable spaces section r305 1 1 section r305 1 1 indicates the minimum ceiling height for basements without habitable spaces and hallways. 6 inches for any habitable room in residential building.