hip roof help
I just started having my attic remodeled for a bedroom/storage/office space. I would be very appreciative if anyone could answer any of these questions..
I have a 100 yr + house with a hip roof, with only soffit vents..from what I can gather. There is a roof overhang..and when it was sided they put these vinyl covers with holes in them up against that overhang? Thats what it looks like from outside.
I would like to ask opinions about any of the below, because I have seen damages done when roofing is ruined; my friend's entire attic bedroom is moldy and water damaged because hers wasn't vented. I dont want this to go to far without being sure it is right:
1. What kind of vents do I need? He put the 'proper vents' styrofoam and r21 in the main section. just the rolled stuff in the hip areas and dormers. He isn't planning any vents, although the proposal says 'vents' . I wonder what kinds of vents I need? He says the natural flow of air from the soffits accross the large open square area at the top will be enough. I wonder about that 40% in the hips areas not being vented.
2. Should plastic vapor barrier be put over the insulation? I have seen this done on TV. and they put sheet plastic over it. He says I dont need it.
3. I plan to heat the area in winter with electric baseboard and cool with window airconditioner located in a window dormer. Will this be enough?
4. One hip area will be an office nook one dormer east side will be a open work space for sewing etc. the other two hip areas ( south side) walled off with doors for closet/storage. Should the enclosed closets be vented differently? These are on the south side of the house and the only area that get large icecycles, so I am worried about something being wrong there.
5. For the knee walls, he insulated down the main roof, and does not plan to insulate the knee walls themselves. He says they dont need it, if the ceiling line is insulated. Is this correct? Anyone have any idea of the best height for kneewalls? I thought 42 at most because they eat into the main living area too much.
I dont know what else you need to answer except may that the house is in upstate NY, and had blown in fiberglass done in house walls and attic floor 10 yrs ago. The attic floor was done as it wasn't a living space then. I dont think it did much as the house is cold and drafty.
I know I asked a lot of questions but any help at all is greatly appeciated.