What's the minimum clearance required when installing rigid duct work on vertical walls with drywall and 2x2 framing.
If I don't install drywall behind the rigid duct work for which there's only 1/2" of clearance, can I install mineral wool in the wall cavity?
I will build a soffit using 2 x 2's spacing them 1" away from the ductwork on two sides to the left of the duct and the front of the ductwork