As answer 2 states or suggests average is subjective and relative.
Avg size of an attic.
Conversely some homes have smaller openings or hatches.
According to the 2006 international residential code r807 1 attic access homes with combustible materials in the ceiling and roof construction must have an access to attic areas that exceeds 30 square feet and with a vertical height of 30 inches or greater.
20 x 50 1 000 sq.
Standard openings are 22 5 x 54 but some homes have wider openings.
The rough framed opening.
Example 20 wide by 50 long attic.
Measure the width of your attic space in feet.
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.
Of living space measures 40 by 45 at the exterior.
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.
To determine the size of your attic multiply the width by the length of the attic floor in feet.
For example if your length is 40 feet and your width is 20 feet then 40 20 800 square feet.
Assume for a moment that a house at 1800 sq.