Best Attic Ventilation Method

Cut the shingles for roof vents.

Best attic ventilation method.

Cut the hole for roof vents. Both can be added to uninsulated attics or layered over existing material. The most common method is the static method. There are two methods used to ventilate attics.

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. While most vents are installed at the top of the roof soffit vents are installed at the bottom edge just under the eaves. Mark attic roof air vent locations. 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.

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. In other words air flows through the attic space naturally without the use of mechanical means. Ridge vent must me installed per the manufactures instructions. The best form of attic ventilation for your home is a balanced system where the intake vents are separate from the exhaust vents.

For this kind of system you need soffit vents and ridge vents. Drive nails up through the sheathing and. The code minimum for attic ventilation in the 2012 irc section r806 roof ventilation 1 is as follows. How to install roof vents.

This method relies on convection which is a mode of heat transfer that is caused by the tendency of warmer air to rise. Center nails between rafters 18 in. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic. For diy attic insulation you ve got two choices.

Of net free area for every 150 sq. Of attic floor space. Best ventilation is open soffit venting to a open vented ridge vent. Once a contractor knows the attic square footage the amount of necessary attic ventilation can be calculated.

From the roof s peak. 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.