Do I Need Insulation Baffles
After the insulation has dried, you can now place the batts, blankets, or blow insulation right to the edge. Note: In order to prevent insulation being blown into the attic floor, blow insulation may require additional blocks. This is done very well by placing a piece if rigid foam board on the outer edges of the top plates.
To completely cover your attic floor with insulation out to the eaves you need to install rafter vents (also called insulation baffles). Complete coverage of the attic floor along with sealing air leaks will ensure you get the best performance from your insulation. Rafter vents ensure the soffit vents are clear and there is a channel for outside air to move into the attic at the soffits and out through the gable or ridge vent. To install the rafter vents, staple them directly to the roof decking. Rafter vents come in 4-foot lengths and 14-1/2 and 22-1/2 inch widths for different rafter spacings. Rafter vents should be placed in your attic ceiling in between the rafters at the point where your attic ceiling meets your attic floor.
Attic baffles work in all kinds and sizes of construction projects. Their main purpose is to provide stability and support for the structures they are attached to. When insulating buildings or homes with support fiberglass insulation, roof insulation baffles will be most commonly used. Fiber insulation today is the most used material in homes.