|Brand||Durovent||ADO Products||ADO Products|
|Name||22 in. x 4 ft. Rafter Vent (10-Pack)||14 in. x 48 in. Rafter Vent 10 Per Carton||Durovent 23-1/2 in. x 46 in. Rafter Vent with Built-In Baffle 10/Ctn|
|Insulation Accessory Type||Rafter Vent||Rafter Vent||Rafter Vent|
|Insulation Features||Water Resistant||Water Resistant|
|View Product||View Product||View Product|
Styrofoam - very thin, but that's all you need
Hi, I am not sure what that rating is, please call 866-240-4933 and select retail.
This product is designed to allow air flow from the soft up past the insulation. If your insulation is higher than one piece, overlap another piece a bit and staple it in. Keep in mind this is about air flow.
Very carefully. if there are tons of protruding nails use them. Once you have them pushed onto nails throw in a couple staples and insulate. Insulation will hold it up.
They are perforated down the middle so you can break in half for 16" oc
Yes every truss space gets one.
So technically no, because you can squeeze the 22in into 20 without damaging the rafter.
Buy ones for 16" on center
The Durovent website has detail on installation. It is installed from the sofit up the underside of the roof to allow air to flow past the insulation.