Can I use air chutes in interior walls?
tognamakes
| Posted in General Questions on
I’d like to make sure that the back of my plank sheathing is able to dry once the rockwool insulation is installed. Can I use the air chutes that you normally find in attics to create an air gap in the walls?
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Replies
Walls need fire-blocking.
Rockwool is a very vapor open material, so your sheathing can dry THROUGH the rockwool. Rockwool (mineral wool) is also hydrophobic, so it won't soak up and hold water like a sponge in the way that fiberglass does.
As DC mentioned, you need fire blocks (horizontal framing members between studs to slow the spread of fire in vertical cavities) in walls, and a vent chute would create a bypass which is a problem.
Bill