Avg Size Of An Attic

Step 3 multiply step 1 and step 2 together to get the area of the attic floor.

Avg size of an attic.

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. Conversely some homes have smaller openings or hatches. 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. Assume for a moment that a house at 1800 sq.

The rough framed opening must be a minimum of 22 inches by 30 inches. 20 x 50 1 000 sq. Example 20 wide by 50 long attic. Of living space measures 40 by 45 at the exterior.

To determine the size of your attic multiply the width by the length of the attic floor in feet. Measure the width of your attic space in feet. That translates to one attic vent 3 feet by 3 feet or two attic vents. Standard openings are 22 5 x 54 but some homes have wider openings.

If you need 6 000 cfm of air flow through your house divide 6 000 by 750 to get a minimum 8 square feet of attic venting. Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. Ceilings building codes stipulate that in rooms with sloped ceilings such as attics at least 50 of the square footage must have ceilings that are 7 feet or higher to be considered livable space. The rough framed opening.

Homeowners must adhere to the rule of 7s which mandates that a finished attic should total at least 70 square feet and should have a minimum height and width of 7 feet. For example if your length is 40 feet and your width is 20 feet then 40 20 800 square feet. The amount of work. 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.

For a single story house this is usually the same as the square footage of the house itself plus any attached garage area. As answer 2 states or suggests average is subjective and relative. Measure the rough opening in your ceiling both the width and length.