Ideally, you will have no sweating if you have proper insulation and ventialtion. Generally moisture forms by ice freezing on the bottom side of the roof sheathng or the nails sticking through tje she ... read more
Hello Geoff,
In fear of giving you information that is obvious or that you already know, we move forward boldly and answer this question. I had a similar addition on a previous home and it was diffic ... read more