How Big Should Attic Access Be

A inch gap around the perimeter of a standard pull down staircase can potentially leak the same amount of.

How big should attic access be.

Tuesday january 28 2020. 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. Insert each board just beyond the cut line where you removed the drywall. The attic may be accessed through a scuttle door or attic hatch usually located in a closet or main hallway.

Measure between the joists and cut two boards to fit one on each side of the opening. 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. If the opening is located in a wall the 30 inch dimension must be vertical. The minimum size for an attic s access building codes.

A home s attic access such as an attic hatch pull down stairs or knee wall door often goes uninsulated and unsealed creating one of the biggest holes in the thermal and air barrier between the attic and conditioned space. The rough opening cannot be less than 22 inches by 30 inches and must be located in a hallway or other readily accessible location. What is the minimum size for attic access opening. The rough framed opening.