How Many Roof Vents Needed

Some local building codes carry special considerations that take precedence.

How many roof vents needed.

For the number of soffit vents in the example divide 8 square feet of ventilation needed by 0 5 for the number of rectangular vents required 16 in the example. 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. Enter square footage calculate or enter the square footage of the attic or area to be vented. The general rule of thumb in these situations is of roughly one vent per every 300 square feet of attic area if the attic has a vapor barrier.

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. How many vents do i need. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent 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.

Keep in mind you should always consult with a professional roofing company when determining how many air vents your roof should have. Proper attic ventilation offers numerous advantages to the homeowner. Although there are many different types of roof vents to choose from ensuring you have the right number of both intake and exhaust vents is a central part of roof design. How many vents will my house need.

The size of your roof and attic space will determine how many roof vents you need. Other types there are also several other types of roof vents including dome or box shaped vents that run through the roof itself. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation for every 300 square feet of attic floor space evenly split between intake and exhaust. Luckily there is a basic formula you can use to determine this.

Advantages of proper roofing ventilation. A roof vent is a type of fixture installed on your roof that exhausts hot air.