Moisture Barrier Help
I just built a two story, 24'x24' garage. The upstairs will be a 370 sq ft - climate controlled -- apartment for guests.
OK, I live in New Orleans and it is hot and humid 8 months of the year and gets below freezing, maybe 30 total days (really nights) a year.
The apartment's ceiling is the building's roof (NO attic) and is 10x12 pitch. The apartment's floor is the garage's ceiling.
1. I have vents on the eaves and a long roof vent (on the roof's peak) and plan to insulate between the roof and ceiling with no vapor barrier (I will have those styrofoam "W" shaped things between the roof and insulation to insure the space between the drywall and roof "breathes"). So I plan (from the outside): roof shingles, felt, plywood, styrofoam "w', insulation, drywall. (again no vapor barrier)
2. On the garage ceiling (which is the apartment's floor), I plan to have (from the uninsulated garage below): the drywall (or plywood) ceiling, MOISTURE BARRIER, insulation, plywood, wood floor.
I do not plan to insulate the garage yet -- it will be open to weather for most of the day. I may insulate it later, but not now.
So, what I really have is sort of an apartment on stilts..... with a garage underneath
Any thoughts to either or both # 1 or # 2 above regarding moisture/vapor barriers???