I have a room under my front porch that I want to make into a wine cellar. The walls are poured concrete (8" thick, 9'high) and the ceiling is poured concrete (3") over corrugated steel sheeting. The problem I have is condensation on the steel in the winter (i.e., cool temperatures.) What is the best way to insulate this space without the worry of condensation (and consequent mold)? I would like to install a drop ceiling and finish it as my wine cellar. BTW, I have foamed (insulation) the spaces between the corrugations and the top of the wall.
Have you received any replies to your post on how to correct the sweating problem under your porch? I am in the midst of a similar project and have the same problem. I'd like to know how you fixed it.