What issue can arise from the distribution of ventilation opening areas?

Improper distribution of ventilation opening areas between eave and ridge openings can lead to ineffective ventilation throughout the space. In roofing and attic systems, eave vent openings are typically responsible for allowing cooler air to enter, while ridge vents allow warmer air to exit. If these openings are not properly balanced or positioned, it may result in stagnant air, moisture buildup, and the potential for mold growth or heat damage.

For instance, if the eave area is too small compared to the ridge vent area, incoming air might not be adequately facilitated, causing pressure differences that hinder airflow. This imbalance can also affect thermal performance, as proper air circulation is necessary to remove heat build-up and moisture.

In contrast, while issues like over-distributed openings, insufficient opening areas on one side, and clogged openings do present challenges, the specific concern regarding the coordination between eave and ridge openings is critical for ensuring consistent and effective ventilation performance in a roofing system. Properly designed and positioned ventilation systems actively support the overall integrity of the structure and contribute to energy efficiency.