Avg Size Of An Attic

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.

Avg size of an attic.

That translates to one attic vent 3 feet by 3 feet or two attic vents. Of living space measures 40 by 45 at the exterior. So the remodeling price will start based on the said measurement and will go up the larger your space is. The rough framed opening must be a minimum of 22 inches by 30 inches.

The amount of work. Conversely some homes have smaller openings or hatches. 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.

Assume for a moment that a house at 1800 sq. For a single story house this is usually the same as the square footage of the house itself plus any attached garage area. Standard openings are 22 5 x 54 but some homes have wider openings. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

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. 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. 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.

Measure the rough opening in your ceiling both the width and length. Adding insulation can cost anywhere between 800 3 500 depending on the size of the attic and the quality of materials used. As answer 2 states or suggests average is subjective and relative. Step 3 multiply step 1 and step 2 together to get the area of the attic floor.

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. 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.