Starting to insulate my van and wondering if there would be any difference if I glued the black side of the thinsulate to the inside of the plastic factory wall panel instead of gluing the white side to the wall of the van. This may make it easie to install but I am concerned if it would cause a condensation problem, or not adhere well. I will use 3M 90 spray I think the glue would work ether way ?? Any thoughts on your expertise would be greatly appreciated Thanks Chuck.