How Many Roof Vents Needed

Proper attic ventilation offers numerous advantages to the homeowner.

How many roof vents needed.

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. 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. Some local building codes carry special considerations that take precedence. 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.

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. Hot air exhaust vents located at the peak of the roof allow hot air to escape. 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.

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. Enter square footage calculate or enter the square footage of the attic or area to be vented. Other types there are also several other types of roof vents including dome or box shaped vents that run through the roof itself. How many vents do i need.

Keep in mind you should always consult with a professional roofing company when determining how many air vents your roof should have. How many vents will my house need. 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.

The size of your roof and attic space will determine how many roof vents you need. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic.