As I understand it, wet room plasterboard only has the property of not molding. It doesn't have any function to stop moisture migration.
If the backside of the old boards functioned as a diffusion barrier/vapor barrier, I think you should install a new vapor barrier in the ceiling before a new ceiling.
If you have a vapor barrier/plastic in the exterior walls, you should have it in the ceiling as well. Especially if the attic is a cold attic, there should also be plastic going from the inner ceiling up to the inside of the insulation on the wall on the upper floor.
If the backside of the old boards functioned as a diffusion barrier/vapor barrier, I think you should install a new vapor barrier in the ceiling before a new ceiling.
If you have a vapor barrier/plastic in the exterior walls, you should have it in the ceiling as well. Especially if the attic is a cold attic, there should also be plastic going from the inner ceiling up to the inside of the insulation on the wall on the upper floor.
Well. I've had moisture-resistant drywall mold too.
just forget one outside
Haha, what a mess it turned out to be
It seems like there are drywall boards WITH a vapor barrier in my ceiling today,
The question is whether I need to install a vapor barrier when I put up drywall.
I'll check cesar's link when I get to the computer.
Keep chatting now
It seems like there are drywall boards WITH a vapor barrier in my ceiling today,
The question is whether I need to install a vapor barrier when I put up drywall.
I'll check cesar's link when I get to the computer.
Keep chatting now
just put up ceiling gypsum or gypsum plank
Take plasterboard and apply waterproofing for the bathroom in an even layer over the entire back before you install them. Don't forget to fill the joints with toilet paper and toothpaste. Then, smooth them with a scrub sponge until the surface becomes even and neat.