hello all! i'm new to this forum, hope to get some helpful info as well as help others with my experience.
I live in Ontario Canada,
we are adding a bathroom to our finished basement, however I have some questions about the ceiling and whether it needs to be vapor barriered from the main floor?
a few things about my basement to give you an idea what im working with....
-65 year old bungalow
-5 years ago complete excavation to exterior to membrane and re-tile drain
-entire inner envelope has 4" wall tite eco spray foam directly on cinder blocks and all sill voids.
-The finished rec room has a drop ceiling with no insulation.
-seperate laundry room/ mechanical room has unfinished celing with no insualtion
-the bathroom is going in a far back room that at one time was an addition to the house, so this is divided by a cinderblock wall with a 36" door opening.
so my bathroom will be very commercial type, all tile floor to ceiling, 55" square schluter kerdi type shower with no door, 1/2 wall with glass to the ceiling on the only wall of the shower.
all saniflo above slab plumbing (sanistar wall mount toilet, sanishower pump for shower and sink)
-schluter line drain in the shower with a U.K. only horizontal outlet to connect with the sanishower.
Now that you have an idea what im up too, here is my question.
the ceiling.....do i need to poly vapor barrier this to keep the moisture from entering the 2x10 main floor joist area? the ceiling is planned to be t and g cedar unfinished with a panasonic fan direct to the sill plate outside (4')
and if the ceiling has to be poly'd do i do the walls as well to seal the entire room?
-one other thing, all wall are cbu over 2x4 and 2x6 (toilet wall) the shower is Kerdi board with kerdi line single slope floor pan....
Any advice would be greatly appreciated :) hopefully this is not too confusing, just want to have all my cards on the table so as to not create alot of other questions. Cheers, Gerry