garfunkel
2016-09-14 22:39:33
- #1
Hello
In the bathroom, from a height of 2.2m up to about 3.5m, there is drywall that is built onto an existing brick wall or will be built.
This wall is an interior wall.
The drywall extension is done with gypsum fiber boards (fermacell). The joints of the gypsum fiber boards are glued.
The cavity of the drywall is soundproofed with mineral wool.
I only wanted to fill the gap between the brick wall and the drywall with filler and then plaster over it.
In this drywall, there are light spots (bathroom suitable) and a distribution box for electricity.
Along a length of 90cm under this wall is the shower; the wall itself is about 3.5m long.
Now, the question of questions.
Do I have to install a vapor barrier or something else here to prevent water vapor from getting into the insulation to avoid mold?
I only know that exterior walls have to be sealed with a vapor barrier or vapor retarder.
Inside, this is generally not necessary.
Does anyone have experience with this?
It certainly won’t be 100% possible for me to seal the insulation. I also see the joint between the brick wall and the drywall as a critical point. Here I could also generously seal with silicone. That means before the boards are installed, apply a nice thick bead of silicone into which the gypsum fiber boards will be pressed.
Above the shower, by the way, there is a bathroom exhaust fan which switches on at high humidity, i.e., when you shower, in order to vent a large part of the humidity outside in advance.
I also have a window, which I will use for ventilation.
What do you think about this?
I suspect I can do without a vapor barrier?
PS: Gypsum fiber boards are bathroom suitable. So my main concern is gaps and joints where some water vapor could possibly creep through and then remain in the insulation.
In the bathroom, from a height of 2.2m up to about 3.5m, there is drywall that is built onto an existing brick wall or will be built.
This wall is an interior wall.
The drywall extension is done with gypsum fiber boards (fermacell). The joints of the gypsum fiber boards are glued.
The cavity of the drywall is soundproofed with mineral wool.
I only wanted to fill the gap between the brick wall and the drywall with filler and then plaster over it.
In this drywall, there are light spots (bathroom suitable) and a distribution box for electricity.
Along a length of 90cm under this wall is the shower; the wall itself is about 3.5m long.
Now, the question of questions.
Do I have to install a vapor barrier or something else here to prevent water vapor from getting into the insulation to avoid mold?
I only know that exterior walls have to be sealed with a vapor barrier or vapor retarder.
Inside, this is generally not necessary.
Does anyone have experience with this?
It certainly won’t be 100% possible for me to seal the insulation. I also see the joint between the brick wall and the drywall as a critical point. Here I could also generously seal with silicone. That means before the boards are installed, apply a nice thick bead of silicone into which the gypsum fiber boards will be pressed.
Above the shower, by the way, there is a bathroom exhaust fan which switches on at high humidity, i.e., when you shower, in order to vent a large part of the humidity outside in advance.
I also have a window, which I will use for ventilation.
What do you think about this?
I suspect I can do without a vapor barrier?
PS: Gypsum fiber boards are bathroom suitable. So my main concern is gaps and joints where some water vapor could possibly creep through and then remain in the insulation.