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Roof Ventilation Methods

January 10, 2011

Roof ventilation prevents moisture from building up in your attic space.  Inadequate roof ventilation can cause many problems including damaged/rotting wood, mildew/mold and insulation damage.

You need both intake vents and exhaust vents for your ventilation system to work properly.  Intake vents allow the air to come in and exhaust vents allow for air to escape.  The amount of ventilation needed depends on the size of the space being ventilated and building codes in your area.

Types of intake vents:

Soffit vents are located on the underside of the eaves of the roof

Gable vents are installed on the wall of the house rather than on the roof.  They are not as effective as soffit vents.

Static vents are installed in rows along the face of the roof.  This type of intake vent is the most likely to cause leaking.

Exhaust vents can be broken down into two groups: static and powered.  Static vents allow the air to escape while the powered vents suck the air out.

Types of static exhaust vents:

Dormer vents are needed if you have a dormer.

Turtle vents (or eyebrow vents) should be used in pairs, one on each side of the roof, for maximum air movement.

Ridge vents run the entire end of the roof’s peak.  They are covered with shingles making them blend in.

Types of powered exhaust vents:

Turbine vents use the wind to spin the vent to allow air flow in and out of the attic space.

Powered vents are generally controlled by a thermostat and will therefore need to have the proper electrical wiring.

Solar powered vents work using the suns energy and works continuously from sunrise to sunset.

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One Comment leave one →
  1. May 8, 2011 10:39 am

    Wow.. great article and informative…

    Thanks for sharing

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