Roof Ventilation Examples

Roof ventilation in a cold climate vents moisture and ensures a cold roof temperature to avoid ice dams.

Roof ventilation examples.

Make sure your home has a balanced roof venting system to increase your home s livability reduce your energy costs make your roof last longer and cut down on costly repairs. So for example if the total roof area in question is 900 square feet you would typically need at least 3 square feet of vented area. For proper roof ventilation roughly every 300 feet of attic space should be vented. As a rule of thumb you will need 1 square foot of vented area for every 300 square feet of attic space if it has a vapor barrier or 1 square foot of vented area for every 150 square feet of attic space if it does not.

On a windy day the vent s turbine mechanism spins which moves hot attic air up and out. The building codes and building science for natural roof ventilation however only appeared in the 1940s. Vent roofs with steeples towers or cupolas can be found in different buildings from barns to cathedrals. August 31 2020.

Comprised of intake and exhaust vents the basic roof ventilation system can be found in a few forms including turbine vents low profile vents and ridge vents that are specially designed to accommodate specific roof shapes. For example ridge vents and gable vents function as both intake and exhaust vents. Andrew kirmayer last modified date. The downside to turbine vents is that they don t provide much venting power on calm days.

Turbine vents are not low profile but in windy climates they provide more ventilation than other types of roof vents. Anyone involved with residential roofing should become familiar with the purpose of attic ventilation and understand how to achieve an effective ventilation system while meeting building code requirements.