How Many Roof Vents Needed

How many vents do i need.

How many roof vents needed.

Luckily there is a basic formula you can use to determine this. 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. Keep in mind you should always consult with a professional roofing company when determining how many air vents your roof should have. A roof vent is a type of fixture installed on your roof that exhausts hot air.

Enter square footage calculate or enter the square footage of the attic or area to be vented. Some local building codes carry special considerations that take precedence. Advantages of proper roofing ventilation. 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.

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. Other types there are also several other types of roof vents including dome or box shaped vents that run through the roof itself. 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. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic.

Proper attic ventilation offers numerous advantages to the homeowner. The size of your roof and attic space will determine how many roof vents you need. 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. The ideal roof attic ventilation would consists of combination of vents located in upper section of the attic ridge vents turbine box shaped or dome static vents electric motor powered vents vents installed along the bottom parts of the roof overhang called intake or soffit vents hip vents and or gable vents all of the provided.

Hot air exhaust vents located at the peak of the roof allow hot air to escape. For example if you have 1200 square feet of attic space you should need at least 4 air vents to ensure proper ventilation.