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Roof Ventilation for Steep Slope Roofs 3:12 or Greater

Pitched Roof Ventilation is achieved by creating air changes in the attic. Roof ventilation is crucial to attics as it positively affects the home inside and out. Removal of excess heat and moisture will help the life of the roof and the efficiency of the HVAC systems within. Pitched roof ventilation is beneficial in all climate zones and in every season.

Pitched Roof Ventilation with Roof Louvers

Pitched Roof Ventilation should be accomplished when you have equal amounts of air exhaust on the roof with air intake typically under the eaves. Exhaust vents should be placed on the upper portion of the roof, meaning no lower than 2ft from the peak. Air intake must be on the lower end of the roof.

Universal Dormer roof exhaust vent, and as a soffit/eave intake vent

Universal Dormer Vent exhaust and roof top intake

Aura Ventilator exhaust with Pop Vent intake

Aura Ventilator exhaust with Soffit intake

diagram of intake and exhaust systems in an attic. Aura Vent exhaust, soffit intakes

Hot air rises. By working with this fundamental physical principle, there are several ways to ensure that your roof is well ventilated all year round. In the summer, attic ventilation will keep the attic space cooler, which will save energy and cool off the whole house. In the winter, moisture will rise into the attic with warm and moist air from the building, and condense when that air is cooled through contact with the cold air in the unheated attic. This moisture if not vented will linger, collect into water which can rot wood, insulation, or other building materials it comes in contact with. In any season, venting requires an intake of air from as low as is practical in the attic space, so that as exhaust roof vent high in the attic space will have a flow of air to allow warmer moist air to escape easily and quickly, before it has an opportunity to condense.