I need to complete a temporary enclosure using my car port as a non permanent work shop. I have nearly complteted the task using vapor barrier plastic. Right now a single layer will keep out the blowing rain and wind. But what will two layers do, one either side of a stud wall for insulation. And will my humidity level belowered in the car port by utilizing heat generated from having light bulbs turned on? The car port will be fully enclosed.
I suspect the R value may be low and will only go high when the distance molecule of air will move is less than one eigth of an inch.
Is there an R factor to such a temporary treatment to a stud wall?