Hownmany Sq Ft In An Attic

Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.

Hownmany sq ft in an attic.

Input length width and desired r value of the area to be insulated. I have 1921 sq ft. Measure the height of your attic in feet. For example if the base is 12 feet and the height is 10 feet the square footage is 6 x 10 60 feet.

To get the area of the attic floor. For example if the height of your attic is 8 feet then 8 2 4. In order to find the right calculator divide the attic floor space by 300 sq feet. Step 5 add together the square footage values of the square rectangular and triangular floor areas to find the total square footage of your attic.

I need to find out how many holes needed in blocking between 22 1 2 center to center roof rafters for attic ventilation. As an example a floor space that totals 70 sq. If your roof is 1200 sq ft soffit floor space you will need 4 sq feet of roof ventilation. Would still not be allowed because its 4 x 17 5 dimensions.

Divide this number by two. The structual engineer on the remodel wants 2 6 blocks that will be 22 1 2 long with 2 diameter holes nailed to wall and to upper roof. In one scenario this would translate to a bare minimum of 7 x 10. Enter square footage calculate or enter the square footage of the attic or area to be vented.

Click the button to calculate the amount of insulation in square feet and man hours wall and ceiling fiberglass insulation needed for this job. How to calculate the square feet of an attic. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. Make sure to measure in the center at the attic s highest point.

Next multiply the 4 square feet into cubic inches. Input length and width of area to be insulated. Divide the attic s square footage by 150. To prevent homeowners from building strangely configured and potentially dangerous spaces.

The federal housing administration recommends 1 square foot of attic ventilation for every 150 square feet of attic space. Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. At least 7 feet in any direction. For example if your length is 40 feet and your width is 20 feet then 40 20 800 square feet.