Attic Hatch Size Ontario

The rough framed opening.

Attic hatch size ontario.

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. Related provisions contained in the ontario electrical safety code. Unobstructed headroom of at least 30 inches must be available above the attic opening. The ontario building code access.

If mechanical equipment or appliances are housed in the attic there must be an unobstructed passageway large enough for the removal of the appliance. Attic or roof space access 1 an attic or roof space more than 600 mm high shall be provided with access from the floor immediately below by a hatchway not less than 550 mm by 900 mm or by a stairway. The access opening should be located in a hallway or other readily accessible location and minimum 22 x 30. Specification at 547 2 mm a 5 4 1 2 1 and 2 air leakage through air barrier system astme283 air leakage single panel csa a440 test rating a1 double panel csa a440 test rating a2.

Minimum vertical height of 30 inches measured from the top of the ceiling framing members to the bottom of the roof framing members. This is generally about a 22 by 30 hole in the ceiling of your house into unconditioned space so it certainly deserves some consideration. There are hundreds of things to detail properly to achieve an airtight home but one of the most commonly overlooked in a typical new house is the attic access hatch. B contains a fuel fired appliance.

Iii 600 mm in height over at least the area described in subclauses i and ii or. Building code the first attic hatch to meet and exceed national building code requirements 9 19 2 1 2 no dimensions less than 545 mm attic hatch inc. If the attic space is smaller than these specs then an access hatch is not required. With several hundred sf of moderately to poorly insulated as well as air leaking ductwork in a typical attic an attic hatch consisting of poorly insulated and poorly sealed 8 square feet and 12 linear feet is a relatively minor concern.

The united states fire administration estimates that in just a two year period from 2006 to 2008 close to 10 000 residential attic fires occurred resulting in nearly half a billion dollars worth of damage. 1 every attic 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.