Best Attic Ventilation Method

Center nails between rafters 18 in.

Best attic ventilation method.

Ridge vent must me installed per the manufactures instructions. From the roof s peak. How to install roof vents. In other words air flows through the attic space naturally without the use of mechanical means.

If your home is fitted solely with small gable end vents or a ventilator high in the roof you might want to consider adding soffit vents to increase airflow. For diy attic insulation you ve got two choices. Once a contractor knows the attic square footage the amount of necessary attic ventilation can be calculated. This method relies on convection which is a mode of heat transfer that is caused by the tendency of warmer air to rise.

For this kind of system you need soffit vents and ridge vents. The code minimum for attic ventilation in the 2012 irc section r806 roof ventilation 1 is as follows. The best form of attic ventilation for your home is a balanced system where the intake vents are separate from the exhaust vents. These vents allow outside air to enter the attic at the lowest point of the roof along the underside of the eave.

One last thought attic ventilation is not there to get rid of heat it is there to get rid of excess moisture accumulating from the home. While most vents are installed at the top of the roof soffit vents are installed at the bottom edge just under the eaves. There are two methods used to ventilate attics. Soffit vents are sometimes installed alone to increase the flow of fresh air into an attic space but they are most effective when used in combination with ridge or box vents.

Soffit vents are intake vents located under the outside eaves of your home. The most common method is the static method. Cut the shingles for roof vents. Best ventilation is open soffit venting to a open vented ridge vent.

Mark attic roof air vent locations. Both can be added to uninsulated attics or layered over existing material. Drive nails up through the sheathing and. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic.

Mixing or combining two or more different types of exhaust vents ridge vents wind turbines roof louvers gable louvers roof mount power fans and gable mount power fans on the same roof above a common attic can actually short circuit the attic ventilation system. Of net free area for every 150 sq. Once you ve decided which type is best for you examine the material options and prices to home in on the right product.