What should be done to prevent mildew and rot in roof insulation?

Improving attic ventilation is crucial for preventing mildew and rot in roof insulation. Proper ventilation allows for the circulation of air throughout the attic space, which helps to regulate temperature and moisture levels. When warm, moist air is trapped in the attic, it creates an ideal environment for mildew and mold growth, as well as potential rot in the structural components and insulation. By ensuring there is adequate airflow, condensation is reduced, and humidity levels can be controlled, which effectively mitigates these risks.

While other options might seem appealing, they do not effectively address the moisture control that ventilation provides. For example, increasing humidity levels would likely exacerbate the problem rather than solve it, leading to a higher chance of mildew growth. Similarly, installing a heating system could create warm air that, without proper ventilation, may lead to the accumulation of moisture. Non-vented insulation may reduce airflow but does not address the condensation issue. Therefore, enhancing ventilation is the most effective solution for preventing moisture-related problems in roof insulation.