Attic Ventilation
Attic ventilation is a system of intake vents (soffit/eave) and exhaust vents (ridge/turbine/power) that circulates air through the attic space to regulate temperature and moisture.
Proper attic ventilation follows the 1:150 rule — one square foot of net free ventilation area for every 150 square feet of attic floor space (or 1:300 with balanced intake and exhaust). In DFW, inadequate ventilation causes attic temperatures to exceed 150°F in summer, which bakes shingles from below, shortening their lifespan by 5-10 years. In winter, poor ventilation traps moisture that causes mold and wood rot. JRH Construction evaluates ventilation during every roof inspection and corrects imbalances during replacement.
Related Roofing Terms
Soffit
Soffit is the material covering the underside of the roof overhang (eave), providing ventilation to the attic and protecting rafters from weather exposure.
Ridge Vent
A ridge vent is a continuous ventilation opening installed along the peak of a sloped roof, covered by a vent strip and ridge cap shingles, allowing hot air to exhaust from the attic.