We rencently bought a home in Buffalo, NY, and there is an addition to it where the first floor used to be the garage and a new upstairs that is not finished at all. There is just plywood for the walls and floor, no siding, no heating. We installed insulation but noticed that frost would form between the insulation and plywood. It has been in the negative numbers the past week. Is that going to be a problem? And if so how do we fix it?