TREC Roof Systems 200 Hr Practice Test 2026 – Complete Exam Prep

The recommendation for roof ventilation ratio is commonly established at a ratio of 1 square foot of vent space for every 150 square feet of attic space. This ratio is designed to promote effective airflow within the attic, allowing for the expulsion of excess heat and moisture, which can lead to various issues, such as mold growth or degradation of roofing materials. Adequate ventilation is critical for maintaining the longevity of the roofing system and ensuring a comfortable indoor environment.

By adhering to this recommended ratio, homeowners can help ensure that their attic remains well-ventilated, thereby minimizing the risk of problems associated with poor air circulation. This optimal balance of intake and exhaust air also assists in regulating temperatures throughout the attic and can contribute to enhanced energy efficiency in the home.