Proper roof ventilation is critical in Colorado's climate, where temperature extremes can range from below zero in winter to over 100 degrees in summer. A well-ventilated roof protects against moisture damage, ice dams, and premature aging of roofing materials.
How Roof Ventilation Works
Effective roof ventilation creates a balanced airflow through the attic space. Intake vents along the soffits draw in cool, dry air, while exhaust vents at the ridge allow warm, moist air to escape. This continuous airflow maintains a consistent attic temperature close to the outside temperature.
Benefits in Colorado
In summer, proper ventilation can reduce attic temperatures by 30-40 degrees, reducing cooling costs and preventing heat damage to shingles. In winter, ventilation prevents warm attic air from melting snow on the roof, which is the primary cause of ice dams in Colorado homes.
Common Ventilation Problems
Many Colorado homes have inadequate ventilation due to blocked soffit vents, insufficient exhaust vents, or insulation covering vent openings. Signs of poor ventilation include ice dams, condensation in the attic, warped decking, and prematurely aging shingles.
Ventilation Requirements
Building codes generally require a minimum of 1 square foot of ventilation for every 150 square feet of attic floor space. For Colorado homes in high-altitude or heavy snow areas, exceeding minimum requirements is recommended for optimal performance.