How do I support interior attached garage floating wall ?
My split level late 50’s home in southern NY has an attached garage. The wall separating the garage is a floating wall and the garage level is on a cement slab, with a block and framed wall. The joists in the ceiling parallel this wall and there are no joists sitting on the wall for support- the wall is between 2 joists letting lots of cold air into my home.
The wall appears to have support from blocks with a stucco type finish, but the finish is well cracked and I need to air seal and better insulate this wall and would like do some blocking to keep the colder air encapsulated in the garage. There are bedrooms above the garage, and a playroom on the opposing side of this garage wall.
Water only collects accumulates on the garage floor when the car comes in from the rain and snow.
Would it be appropriate to put plastic sheeting between the insulation and sheetrock? Or maybe even rigid foam?