What is the minimum ventilation requirement for attics in residential buildings?

The minimum ventilation requirement for attics in residential buildings is set to ensure adequate air circulation, which helps to prevent moisture buildup, reduce the risk of mold growth, and maintain energy efficiency. The correct standard is 1 square foot of vent area for every 300 square feet of attic space. This ratio allows for sufficient airflow to promote a balanced indoor environment, especially in climates where temperature fluctuations can lead to condensation in the attic.

In this context, ventilation is critical, as it helps to remove heat in the summer and moisture in the winter. Proper ventilation contributes to the longevity of roofing materials and the overall integrity of the structure. Following this guideline ensures that the attic ventilates effectively, helping to protect the home from potential damage over time caused by improper air flow.