We are completing construction of a 1½ story house in Hanover, N.H.
We are completing construction of a 1½ story house in Hanover NH. There is an unfinished “bonus” room over the 3 car garage. It has multiple windows. The plan is to someday convert this to a mother-in-law quarters. Currently, there is no ventilation, and no heating or cooling. Last winter icicles formed from the rafters, and one of the workers mentioned that there was some moisture (dripping from roof) on hot humid days this summer. We are concerned that the extreme temperatures will cause damage because of the water accumulation in the room. The room is now much like an unfinished attic, except there is absolutely no ventilation.
Questions: Should we add some insulation to the ceiling and / or walls to avoid the ice and dripping? If so, how much? Is there something else that we should do? Is this normal?
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