Calculating Attic Ventalation

According to their requirements you should have 1 square foot of attic ventilation per 300 sq ft of attic floor space.

Calculating attic ventalation.

To find out how many soffit vents you need to install. Our passive roof vents are ul certified and rated to withstand wind pressure in excess of 200 mph. See quantities below for each gaf ventilation product typically rounded up. As an example in an attic that is 30 feet by 20 feet you would have 600 square feet of floor area.

Calculate or enter the square footage of the attic or area to be vented. Hit the calculate button for the recommended amount of exhaust and intake ventilation. According to the fha federal housing administration us for every 300 square feet of attic floor area you should have at minimum one square foot ventilation. Calculating ventilation area ok to determine how much ventilation area you need for your house all you need to know is the square foot area of the attic to be ventilated.

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. Hence you would need two square feet 600 300 of attic ventilation. Jones has an attic space that measures 23 feet by 48 feet. This yields a total area of 1 104 square feet.

Select ventilation product flex roll ridge vent multi roll multi purpose vent rigid roll ridge. Calculate the total vent area needed multiply the length of the attic times the width in feet to find the attic area. There should also be a 50 50 balance of attic venting and roof venting. Width or area.

Home attic vent calculator for years we have been working with architects and specifiers to ensure affordable roof ventilation that upholds building code standards. The house measures 30 feet by 50 feet. Let s use the following simple ranch house for an example. Roof ventilation calculator enter your attic area or length and width to determine your ventilation needs.

If your roof is 1200 sq ft soffit floor space you will need 4 sq feet of roof ventilation.