The former owners took out 2 windows alongside the fireplace in my living room in my 1936 home. They threw in a piece of hardboard and left the storm windows in. 5 to 6 years ago, my uncle removed the storm windows and put in proper drywall/insulation/plywood/siding. In the last couple of years, I've noticed that the interior walls have a moist "shine" on the tape where the new drywall meets the plaster. It seems that moisture is getting in. I'm wondering if perhaps there should have been a different kind of insulation used or if anyone has suggestions on what I should do to fix the problem. I don't know if removing the cedar shingle siding and adding a sort of barrier on the outside is the fix or adding better insulation in the wills themselves is what is needed. Thanks.