How Many Roof Vent On A Roof

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 roof vent on a roof. Choosing round soffit vents for. Ventsure 4 foot strip heat moisture ridge vent. Attic ventilation requirements how many attic vents your roof needs industry standard for proper attic ventilation recommends for no vapor retarder type of attic insulation no paper plastic or aluminum layer between the attic floor and insulation layer 1 sq. As a general rule your roof needs 1 square foot of vent area for every 150 square feet of attic space.

Tips for assessing your needs. 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. Roof vents choose one of the following products to meet the recommended exhaust nfva of 528 square inches. Some local building codes carry special considerations that take precedence.

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. 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. Advantages of proper roofing ventilation. They should be divided equally between inlet and outlet vents and they can be used in any combination that will work with your roof s design.

In no case should the amount of exhaust ventilation exceed the amount of intake ventilation. How many vents will my house need. Thus if your attic is 450 square feet you need roof vents equaling 3 square feet. 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.

The installation of roof vents is a crucial part of roof design because it allows for proper attic ventilation which may help prevent condensation and early aging of your roofing materials. If you want to learn more or are interested in a roofing job 1 800 hansons is at your service. Keep in mind you should always consult with a professional roofing company when determining how many air vents your roof should have. But if your roof has a slope greater than 6 12 this means that there will be more volume in your attic than the actual square footage.

Contact us today for a free estimate. Feet of attic space divided 50 50 between the inlets and outlets. Although there are many different types of roof vents to choose from ensuring you have the right number of both. For example if you have 1200 square feet of attic space you should need at least 4 air vents to ensure proper ventilation.