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You can determine the amount of roof ventilation needed by dividing your attic's square footage by 150. This calculation gives you the required ventilation area in square feet to ensure proper airflow. For balanced ventilation, install half of the vents as intake vents (like soffit vents) and the other half as exhaust vents (like ridge vents) to protect your roof's integrity and prevent moisture buildup.

Roof ventilation is crucial for maintaining your home's comfort and extending the life of your roof. It expels hot, moist air from the attic, protecting roofing materials and preventing water damage problems like mold and mildew. Effective ventilation improves energy efficiency and reduces the likelihood of costly repairs over time.

No, a ridge vent doesn't need to span the entire width of the roof. It's installed along the central ridge to provide optimal airflow while preventing water leaks and pest intrusion. Extending the vent beyond the ridge isn't necessary and can increase the risk of leaks. Proper installation along the ridge ensures your roof remains weather-resistant.

The best type of roof vent depends on your home's design, climate, and ventilation needs. Ridge vents offer efficient airflow and a sleek appearance for many homes. In extremely wet or hot climates, soffit vents or turbine vents might perform better. Consult a local roofing professional to determine the optimal vent system for your home.