Even with a 3 12 2 4 truss you are looking at a minimum r15 at the farthest edge.
Installing air baffles in attic.
Step 2 in the bay.
Staple each side to the roof deck spaced about every 4 inches.
Installing rafter vents between the rafters along the soffit on the.
By installing the baffles properly you can increase the r value all the way out to the exterior sheathing.
Without this air movement any moisture that gets into the attic area becomes stagnant and causes mold and mildew to develop.
If your roof rafters have been covered over with drywall or plywood you will have to remove it in order to install the baffles.
Pull any existing insulation away from the edges of the attic where you will be putting up the baffles.
Install attic baffles if the attic doesn t have attic baffles let s install them.
As listed in the definition above the baffle is meant to regulate the flow of air.