Originally Posted by Richy R
Similar issue we are adding a gasket and insulation
Around your inner wall there was bracing for adding rigidity to the inner wall.
The trapped moisture is the issue. Yes I will add insulation, the question is what type of material and how to install the vapor barrier.[/QUOTE]
The insulation was standard household fiberglass insulation from the hardware store. Doppleganger purchased a roll and cut strips and pushed them in with his hand reaching as far as possible back. We were able to get two strips inserted on both sides plus cut a few more strips for above and below the window.
As for the gasket (doesnt cover completely) but it does help. When the trim was taken off the 3m adheasive was applied and cut that is on the gasket. Then when done filling up the insulation just screwed back in the trim piece and made sure the gasket was inside the frame as much as possible.