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Title
Venting in Steep-Slope Roofing
Venting in Steep-Slope Roofing
Date
7/2022
7/2022
Author(s)
Page(s)
1-10
1-10
Keyword(s)
venting; airflow; installing; ceiling
venting; airflow; installing; ceiling
Abstract
Steep roof venting allows attic and cathedral ceiling rafter spaces to either passively vent through convection or actively vent through mechanical means to manage temperature and moisture levels. Convection venting is a movement of air caused by warmer air to rise and exhaust to the exterior, while mechanical venting is the use of electrical fans to draw and exhaust the air to the exterior. For new construction, roof venting is usually a code requirement. In addition, many manufacturers require roof venting before providing a roof system warranty for reroofing projects. Failure to install venting can lead to premature deterioration of the roofing materials and structure due to increased temperature and humidity, condensation, and the formation of ice dams in colder climates. A wide variety of venting products and strategies have been developed through the years, but selecting, installing, and maintaining a system that works for a given project and climate requires careful consideration.
Steep roof venting allows attic and cathedral ceiling rafter spaces to either passively vent through convection or actively vent through mechanical means to manage temperature and moisture levels. Convection venting is a movement of air caused by warmer air to rise and exhaust to the exterior, while mechanical venting is the use of electrical fans to draw and exhaust the air to the exterior. For new construction, roof venting is usually a code requirement. In addition, many manufacturers require roof venting before providing a roof system warranty for reroofing projects. Failure to install venting can lead to premature deterioration of the roofing materials and structure due to increased temperature and humidity, condensation, and the formation of ice dams in colder climates. A wide variety of venting products and strategies have been developed through the years, but selecting, installing, and maintaining a system that works for a given project and climate requires careful consideration.