Which of the following is a consequence of poor roof ventilation?

Poor roof ventilation is primarily associated with increased moisture accumulation within roofing assemblies. When a roof lacks adequate ventilation, warm air that rises from the interior of the building can get trapped in the attic or under the roof. This warm air can lead to condensation as it cools, which then results in moisture buildup within the roofing materials. Over time, this accumulated moisture can contribute to a range of issues, including mold growth, rotting of wooden components, and degradation of insulation effectiveness.

In contrast, good ventilation helps to regulate temperature and moisture levels, promoting the longevity of the roofing materials and maintaining the integrity of the roofing system. By allowing for proper airflow, excess moisture can escape, thereby reducing the risk of damage and ensuring that the roofing assembly remains in good condition. This underscores the importance of having an appropriate ventilation strategy in place for roofing systems.