What can cause poor performance in attic ventilation?

Poor performance in attic ventilation can often be attributed to incorrectly sized ventilation openings. When ventilation openings are either too small or too large, they can disrupt the intended airflow needed for efficient ventilation. If the openings are too small, they can restrict airflow, preventing the circulation of fresh air and inhibiting the escape of heat and moisture from the attic. This can lead to increased humidity levels, condensation, and potential damage to roofing and insulation materials. Conversely, if the openings are disproportionately large, they can cause excessive airflow that may compromise the home's energy efficiency.

Correctly sizing ventilation openings is crucial to achieving a balance that allows for effective air exchange while preventing issues such as temperature build-up and moisture accumulation. Therefore, ensuring that ventilation openings are properly sized according to the specific requirements of the attic space and local building codes is essential for optimal attic ventilation performance.