Airflow Control

By controlling airflow within a building, you are able to prevent moisture damage, increase energy efficiency, and improve comfort and health.

Preventing Moisture Damage-  Air containing moisture that infiltrates wall and roof cavities can lead to mold growth. Mold can cause structural damage as well as lead to health problems.

Increasing Energy Efficiency-  Air leaking out of a building equals air entering into the building. This hot/cold air leaking in must be conditioned which requires energy. Approximately 30% to 50% of space conditioning energy consumption in many buildings is due to air leakage through the building enclosure.

Improving Comfort & Health- Exterior air entering a home can be ridden with pollutants, dust, contaminants, and allergens, all of which can be a problem for individuals with respiratory issues. Drafts caused by excessive air leakage can be uncomfortable to occupants. Airborne sound transmission can also be bothersome to homeowners, but can be reduced by controlling airflow.

Airflow Control Strategies

  1. Limiting pressure differentials- controlling Wind, stack, and mechanical pressures within a building

  2. Air-tight building enclosures- building a tight outer shell (air-tight walls and roof)

  3. Exterior air barrier- housewrap/sheathing taped and sealed

  4. Interior air barrier- Airtight Drywall Approach

  5. Balanced mechanical ventilation

  6. Spray foam air sealing