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Originally Posted by Old Goat  I will have a 4x4 x8"deep trap in the back wall (4" fiberglass batt, 4" air space). Is it necessary to caulk the corner joints and where the back is nailed on? |
It'd be better still to not have a back at all...or am I misunderstanding? Even if you built the panels with the 2" or 4" air gap in the frame you wouldn't need a back...it wouldn't hurt you in that case, but it's not necessary. If you didn't build them with an air gap and you're planning to stand them off the walls 2" or 4", then don't build a back.
Frank