If the opening is located in a wall the 30 inch dimension must be vertical.
How big should attic access be.
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.
Measure between the joists and cut two boards to fit one on each side of the opening.
According to the 2006 international residential code r807 1 attic access homes with combustible.
The rough opening cannot be less than 22 inches by 30 inches and must be located in a hallway or other readily accessible location.
The minimum size for an attic s access building codes.
The attic may be accessed through a scuttle door or attic hatch usually located in a closet or main hallway.
These should be at least 2 by 6 inches in size.
What is the minimum size for attic access opening.
If the access is located in the ceiling the minimum unobstructed headrom above the opening must be 30 inches measured vertically at some point over the access.
A inch gap around the perimeter of a standard pull down staircase can potentially leak the same amount of.
Toenail the board into the joist so that the bottom of the 2 by 6 inch board is level with the bottom of the joist.
The rough framed opening.