Understanding Attic Ventilation
Proper attic ventilation is crucial for maintaining building integrity and energy efficiency.
- Moisture Control Prevents condensation and mold growth.
- Temperature Regulation Reduces cooling costs and prevents ice dams.
- Building Protection Extends roof life and protects materials.
- Energy Efficiency Improves overall building performance.
Code Requirements
Basic Ratio
1:150 without vapor barrier
With Barrier
1:300 with vapor barrier
Distribution
50/50 high/low vents
Minimum
Net free area calculation
Ventilation Types
- Soffit Vents Low intake ventilation.
- Ridge Vents Continuous exhaust at peak.
- Gable Vents End wall ventilation.
- Roof Vents Spot ventilation options.
Installation Best Practices
- Proper Balance Match intake and exhaust.
- Clear Path Maintain airflow path.
- Insulation Don't block soffit vents.
- Maintenance Regular inspection needed.