An attic baffle is simply an item to regulate the flow of air aka required roof venting and impede it the insulation from interfering with each other.
Foam attic air baffles.
Attic baffles also called channel vents vent chutes proper vent and about 50 other names help direct air flow from the soffit through the attic.
Attic baffles how they work.
They can reduce roof deck temperature minimize ice dam issues and can help control attic moisture.
From left to right air flows through the soffit vents up over the baffles allowing for the required roof venting.
Learn bob kelly s method of using rigid foam for his vent baffles.
They also keep insulation from falling into and clogging up the eaves.
Ado products durovent 23 1 2 in.
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.
The picture below courtesy of the epa indoor airplus program which we provide builder verification services for helps show how the system works.