How To Ventilate An Attic

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

How to ventilate an attic.

The best form of attic ventilation for your home is a balanced system where the intake vents are separate from the exhaust vents. Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. You re probably familiar with the round ones that spin. Look at your eaves and roof.

Ventilation can be accomplished using various products and techniques. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca. Intake vents which are located at the down slope edge of the roof aka eave s and allow fresh air into the attic. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.

These are not bad for ventilation. To properly ventilate an attic two types of vents are needed. Here are four signs of an unventilated or under ventilated attic. Touch your ceiling on a warm sunny day.

Most building codes require a ratio of 1 150 ventilation space to attic floor space. We call those whirlybirds or turbine ventilators. These rely on the wind to keep it moving. A hot ceiling tells you that the attic is acting like a solar oven.

If you don t see any attic vents on the roof or in the eaves you need to add some. When it moves it causes a draw in the attic space to help remove heat.