The foam block should sit flush over the exterior sheathing on the outside and the interior drywall on the inside.
Air baffle attic.
It can be cut to fit most joist spaces and is an affordable way to meet energy code requirements for air flow.
The beauty of attic baffles is that they are available from most home improvement stores and can be installed simply with a few staples if you want the diy approach.
The picture below courtesy of the epa indoor airplus program which we provide builder verification services for helps show how the system works.
Basic functions of baffles baffles are chutes that when installed properly can provide a channel for air to flow from your exterior soffit vents up into your attic space.
Use it between rafters to create an air channel through insulation to help keep air flowing freely in your attic.
Baffles are also called wind baffles venting chutes rafter vents or insulation baffles.
Baffles are a critical component to our attic insulation process that provides multiple benefits to a difficult construction aspect.
For improved air circulation in the attic install the durovent 22 in.
Baffles provide a channel for air to flow through certain parts of the attic.
That airflow is intended to churn the stale air in.