Red Seal Roofer Practice Exam 2025 – Complete Test Preparation

Inadequate attic ventilation can lead to increased temperatures and humidity levels within the attic space. This environment creates conditions that are conducive to mold growth, particularly on organic materials like wood, insulation, and drywall. When moisture is trapped due to poor airflow, it can condense and lead to water saturation, allowing mold spores to thrive.

Good ventilation allows for the exchange of air, helping to regulate temperature and moisture. When this is compromised, the resulting stagnant air can promote fungal growth, which not only damages the structures within the attic but can also pose health risks to the occupants of the building. Therefore, understanding attic ventilation's role is critical for preventing mold-related issues.

In contrast, the other options suggest benefits that are associated with proper ventilation, such as improved energy efficiency and better insulation performance, which would not be a direct consequence of inadequate air movement. Additionally, a longer roof lifespan typically results from a well-ventilated attic, as it helps in reducing heat build-up that can damage roofing materials.