Ridge Vent

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Understanding The Purpose Of Roof Vents

The roof vents allow for moisture dissipation, temperature control and airflow through the attic and roof deck. The vents serve a variety of purposes depending on the build of your home and local climate characteristics. As roofing professionals, we must properly assemble and maintain the vents to ensure they provide the expected benefits to our customers. Otherwise, the home could suffer from energy loss from inefficient cooling or heating, roof damage from ice dams or trapped humidity and mold or rot of the existing materials.

Roof Venting Assessment

The roof vents start in the attic where the insulation traps heat and humidity from the living space in your home. Roofers must inspect the insulation and common leak points, like the access hatch and light surrounds, to assess fluctuations in that space. The amount of expected airflow leakage in the attic helps determine the size and location of the vents. Roofers must also consider the building codes in your area to determine if your roof requires venting. If so, the required vents need to go in to ensure your build passes inspection.

Installation of Roof Vents

The roof vents often exit out right below the ridge cap on the tallest part of the roof. In many cases, the vent chute should sit at least two inches deep or meet the given code requirements. To better channel the air and humidity out of the vents, the gaps between the rafters require a layer of closed cell foam. Alternatively, it's possible to extend the edges of the rafters to make room for more fiberglass insulation.

For more information about Roof venting, visit Fine Homebuilding

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