Measure the width of your attic space in feet.
Avg size of an attic.
Conversely some homes have smaller openings or hatches.
Of living space measures 40 by 45 at the exterior.
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.
The rough framed opening must be a minimum of 22 inches by 30 inches.
For example if your length is 40 feet and your width is 20 feet then 40 20 800 square feet.
Step 3 multiply step 1 and step 2 together to get the area of the attic floor.
Example 20 wide by 50 long attic.
To determine the size of your attic multiply the width by the length of the attic floor in feet.
Measure the rough opening in your ceiling both the width and length.
20 x 50 1 000 sq.
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.
As answer 2 states or suggests average is subjective and relative.
Standard openings are 22 5 x 54 but some homes have wider openings.
Assume for a moment that a house at 1800 sq.