The picture below courtesy of the epa indoor airplus program which we provide builder verification services for helps show how the system works.
Foam attic air baffles.
They also keep insulation from falling into and clogging up the eaves.
Attic baffles how they work.
If you re insulating a ceiling and need to maintain an air sealed vent space from the soffit all the way to the ridge you could use plastic vent baffles stapled into place between the rafters and try to air seal them but there s a better way.
Baffles are also called wind baffles venting chutes rafter vents or insulation baffles.
Ado products durovent 23 1 2 in.
Baffles provide a channel for air to flow through certain parts of the attic.
Attic ventilation system with built in baffle 10 per carton 4 4 out of 5 stars 3 accuvent 14 5 x 50 16 o c flame retardant pvc high energy vent 50 pack acbp18429.
Learn bob kelly s method of using rigid foam for his vent baffles.
They can reduce roof deck temperature minimize ice dam issues and can help control attic moisture.