This is generally about a 22 by 30 hole in the ceiling of your house into unconditioned space so it certainly deserves some consideration.
Attic hatch size alberta.
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.
B contains a fuel fired appliance.
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.
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.
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.
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.
The rough framed opening must be a minimum of 22 inches by 30 inches.
Is the only company in canada that has developed and patented a pre built attic access assembly that meets all national building code requirements.
If the attic space is smaller than these specs then an access hatch is not required.
Unobstructed headroom of at least 30 inches must be available above the attic opening.
The access opening should be located in a hallway or other readily accessible location and minimum 22 x 30.
With exposed insulation in the attic access is not recommended unless protective clothing and breathing apparatus are worn.
It is easy to install and has a natural wood finish.
Access hatches are generally built to the minimum acceptable dimensions of 500 mm by 700 mm further limiting the size of material that can be moved into the attic.
If mechanical equipment or appliances are housed in the attic there must be an unobstructed passageway large enough for the removal of the appliance.
33 5 inch x 21 5 inch attic hatch this attic access is polyurethane filled for a high insulation value.
The rough framed opening.
The attic hatch consists of a metal outer frame that is drywalled into the ceiling making the attic hatch frame totally air tight.
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.
