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Baffle (attic)
A baffle is a channel that keeps an air path open from soffit vents into the attic above the insulation.
Why it matters
It keeps insulation from blocking ventilation, which helps manage moisture and temperature.
Where people get this wrong
Baffles do not add insulation. They protect airflow. A vented attic needs airflow above insulation, not through insulation.
Real-world example
A crew blows in attic insulation and it piles into the eaves, blocking airflow. Months later, mold shows up on the roof deck. Baffles would have prevented the block.
Where this hits your build
This affects comfort, energy costs, and indoor air quality. It gets locked behind drywall, so decisions here need to be right before finishing starts.
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