Minimum Attic Hatch Size

Here in canada our minimum attic insulation requirement is r 40 that s a metric u value of 0 142 if you re in europe or actually using the units we re supposed to be in canada.

Minimum attic hatch size. Access 1 everyattic or roof space shall be provided with an access hatch where the attic or roof space a measures not less than i 10 m in area ii 1 000 mm in length or width and. Minimum opening size 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. Minimum of 22 inches wide by 30 inches high 559 mm wide by 762 mm high. Unobstructed headroom of at least 30 inches must be available above the attic opening.

If the attic space is smaller than these specs then an access hatch is not required. Tuesday january 28 2020 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 compact attic ladder requires a minimum height of 28 and minimum depth of 44 inside the attic above and behind the opening. If you only need to access your loft on rare occasions such as to get christmas decorations down once a year this is a.

When the access is located in a ceiling minimum unobstructed headroom in the attic space shall be 30 inches 762 mm at some point above the access measured vertically from the bottom of ceiling framing members. Options the attic may be accessed through a scuttle door or attic hatch usually located in a closet or main hallway. The minimum size for an attic s access by michele norfleet. Standard loft hatch sizes can only really be used with a traditional extension ladder that is placed inside the framework of the loft hatch to allow you to climb in and out of the loft.

Before installing the attic access hatch you will want to insulate the backside of it before putting everything in place. Minimum vertical height of 30 inches measured from the top of the ceiling framing members to the bottom of the roof framing members. The access opening should be located in a hallway or other readily accessible location and minimum 22 x 30. The 2007 california building code requires a minimum attic access opening of 20 inches by 30.

The ontario building code access 9 19 2 1. For smaller attic openings with a minimum measurement of 18 x 24 you will need to measure the swing clearance inside the attic space. The rough framed opening must be a minimum of 22 inches by 30 inches.