New answers tagged joists
Weight isn't going to be your issue here. 2 inch furring strips may be pretty hard to hit with the drywall screws. The screws need to be in good solid wood and not going through an edge etc. If You are careful, caulk some good lines, the 1X2's might work for ya. The other consideration is if the spacing is good and you have enough surface to butt pieces of ...
Usually the HVAC subs knock them out and leave them out, but if you place something like a 1X4 or heavier between the 2 joists at the bottom, it would stabilize the movement of joist deflection. Make sure it is a tight fit.
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