Average Attic Opening Size

Some slide some fold.

Average attic opening size.

For example if your length is 40 feet and your width is 20 feet then 40 20 800 square feet. Example 20 wide by 50 long attic. Due to various opening sizes and finishes a door is not included with this ladder. To make a door use cabinet grade plywood cut 1 8 smaller than the wood door frame opening.

20 x 50 1 000 sq. Roughing an opening for fold down attic stairs. Fold down attic stairs provide convenient access to your attic without taking up space in the floor below the attic. For a single story house this is usually the same as the square footage of the house itself plus any attached garage area.

The rough framed opening must be a minimum of 22 inches by 30 inches. In new installations a rough. 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. There are plenty of choices that will fit into an existing opening typically 22 or 25 inches by 54 inches.

Unobstructed headroom of at least 30 inches must be available above the attic opening. Standard openings are 22 5 x 54 but some homes have wider openings. If the opening is located in a wall the 30 inch dimension must be vertical. You have your pick of wood aluminum or steel in different heights weights and load capacities.

It s important to understand the opening size you have or will create to ensure you select the correct attic ladder product for your home. Step 4 measure the height of your attic in feet. Measure the rough opening in your ceiling both the width and length. A few have rails that telescope like an old fashioned shaving mirror.

The rough opening cannot be less than 22 inches by 30 inches and must be located in a hallway or other readily accessible location. Screw the hinges included to one edge of the door and then attach them to the frame of your opening. Conversely some homes have smaller openings or hatches. If mechanical equipment or appliances are housed in the attic there must be an unobstructed passageway large enough for the removal of the appliance.

Both of these choices were only slightly bigger than. Multiply step 1 and step 2 together to get the area of the attic floor.