How Many Roof Vents Should A House Have

There are also gable and roof fans which actively pull the hot air out of the attic.

How many roof vents should a house have.

Keep in mind you should always consult with a professional roofing company when determining how many air vents your roof should have. Thus if your attic is 450 square feet you need roof vents equaling 3 square feet. There are strict rules about exactly how many soffits also called air intake vents are required and how far apart they must be. Some local building codes carry special considerations that take precedence.

Basic attic ventilation principal is to keep that unused section of our house as cool as possible critical condition during the cold season dividing amount of the roof upper and lower vents 50 50. Choosing round soffit vents for this home means that 8 square feet of required ventilation be divided by 0 196 for about 40 round vents. 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. Enter square footage calculate or enter the square footage of the attic or area to be vented.

The amount of soffit ventilation you need will depend upon building regulations. As a general rule your roof needs 1 square foot of vent area for every 150 square feet of attic space.