Whats best way to insulate unvented attic room and room without vents
Im building new house in douglasville georgia i think zone 7. or 3 . i have bonus room above garage with 10 x8 part of the room will be vaulted ceiling , ( rest of the room 16×8 is standard with regular ceiling.) the vaulted ceiling has 2×10 rafter 16″apart 10/12 pitch. the vaulted part of the ceiling i plan to not vent and do closed cell spray foam, is that best way to go? i dont want condensation and i dont want to add on to reduce the ceiling height, garage below will not be heated or cooled.
this house is 2 story so one room on the first floor has a lvl beam holding second floor wall. this room ceiling is 1/2 under the second floor and 1/2 shares the front porch roof with 4/12 pitch and a metal roof . how do i insulate this with no way of venting it beacause the second floor wall is right above it, also there is not much space in the ceiling for blow-in insulation. should i block off the porch part of the ceiling away from the room and just do spray foam? closed or open cell?
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