Air Baffle Attic Insulation
They are usually made from cardboard or rigid foam board or polyvinyl chloride.
Air baffle attic insulation. The ventilation system features polystyrene construction which is lightweight and moisture resistant and the integrated baffle means that you need no blocking material between the vent and the top plate. Rafter vent with built in baffle helps keep air moving in your attic. Sometimes called rafter vents baffles provide ventilation and keep the insulation from blocking airflow through your attic. From left to right air flows through the soffit vents up over the baffles allowing for the required roof venting.
This can cause moisture buildup. Without a wind wash barrier air enters the attic freely and flows above the insulation in the ceiling greatly reducing its r value. They are known are also known as wind baffle insulation baffles rafter vents or venting chutes. Attic baffles how they work.
The picture below courtesy of the epa indoor airplus program which we provide builder verification services for helps show how the system works. 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. The ado products durovent 23 1 2 in. In brief baffles are designed to provide a channel of air to flow through specific parts of your attic.
As with attic floor insulation moisture and heat removal are the reasons for creating proper air. 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.