Hey all - I am in the Midlands of SC so you know the climate. I just inspected a home that looks like they installed a new vapor barrier right over the old one which still looked very much intact. (top layer was clear, bottom was black).
I learned way back in Sex-Ed that two layers isn’t necessarily better, and in fact, could actually be worse…
Does the same go for vapor barriers? The reason I ask is there was a whole bunch of moisture in between the two layers and my little brain tells me that since that water has nowhere to go, it will sit there and mold.