Unconditioned Attic Ventilation

Verify the presence of an effective air barrier and thermal boundary between the attic and living space

Attic vent types will be consistent with requirements for their specific location (e.g., exterior soffit, gable end, roof) and material and intended use (e.g., metal vent on metal roof)

Install only passive ventilation, no powered ventilators may be installed

Ventilation opening area and configuration will comply with applicable building code

Install between 40 and 50 percent of attic ventilation within 3 feet of the highest point in the ventilated space

Install attic vents in locations that prevent entry of wind-driven precipitation

All attic ventilation sources with holes greater than 1/4" will have corrosion-resistant wire mesh screens installed with openings of 1/16" to 1/4"

Existing vents that are not screened will be covered with corrosion-resistant wire mesh with openings of 1/16" to 1/4"

If soffit venting is installed, mechanically fasten baffles (i.e., soffit chutes) in each truss bay that terminate at least 6" above final insulation level and provide a minimum of 1" clearance between insulation and roof deck material