ᐅ How to Seal a Drywall Partition Wall with Insulation (Interior Bathroom Wall)?
Created on: 14 Sep 2016 22:39
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garfunkelG
garfunkel14 Sep 2016 22:39Hello
In my bathroom, from a height of 2.2m (7 ft 3 in) up to about 3.5m (11 ft 6 in), a drywall partition is being installed on top of an existing brick wall.
This is an interior wall.
The drywall extension is done using gypsum fiberboards (fermacell). The joints of the gypsum fiberboards are glued.
The cavity of the drywall partition is sound insulated with mineral wool.
I plan to only fill the gap between the brick wall and the drywall with filler and then plaster over it.
This drywall contains recessed spotlights (bathroom-rated) and an electrical distribution box.
Under this wall, for a length of 90cm (35 inches), there is a shower; the wall itself is about 3.5m (11 ft 6 in) long.
Now to the main question.
To prevent mold, do I need to install a vapor barrier or something similar to stop water vapor from reaching the insulation?
I understand that exterior walls usually require vapor retarders or vapor barriers.
Inside walls typically do not.
Is anyone familiar with this?
I’m sure I won’t be able to completely seal the insulation. I also see the joint between the brick wall and drywall as a critical point. I could also generously seal this with silicone. Meaning, before fixing the boards in place, I would apply a thick bead of silicone which the gypsum fiberboards would then be pressed into.
Above the shower, there is a bathroom extractor fan that turns on at high humidity, for example when showering, to remove a large portion of the moisture-laden air.
I also have windows that I will use for ventilation.
What do you think?
I assume I can do without a vapor barrier?
PS: Gypsum fiberboards are suitable for bathrooms. My main concern is the gaps and joints through which water vapor could potentially pass and then remain trapped in the insulation.
In my bathroom, from a height of 2.2m (7 ft 3 in) up to about 3.5m (11 ft 6 in), a drywall partition is being installed on top of an existing brick wall.
This is an interior wall.
The drywall extension is done using gypsum fiberboards (fermacell). The joints of the gypsum fiberboards are glued.
The cavity of the drywall partition is sound insulated with mineral wool.
I plan to only fill the gap between the brick wall and the drywall with filler and then plaster over it.
This drywall contains recessed spotlights (bathroom-rated) and an electrical distribution box.
Under this wall, for a length of 90cm (35 inches), there is a shower; the wall itself is about 3.5m (11 ft 6 in) long.
Now to the main question.
To prevent mold, do I need to install a vapor barrier or something similar to stop water vapor from reaching the insulation?
I understand that exterior walls usually require vapor retarders or vapor barriers.
Inside walls typically do not.
Is anyone familiar with this?
I’m sure I won’t be able to completely seal the insulation. I also see the joint between the brick wall and drywall as a critical point. I could also generously seal this with silicone. Meaning, before fixing the boards in place, I would apply a thick bead of silicone which the gypsum fiberboards would then be pressed into.
Above the shower, there is a bathroom extractor fan that turns on at high humidity, for example when showering, to remove a large portion of the moisture-laden air.
I also have windows that I will use for ventilation.
What do you think?
I assume I can do without a vapor barrier?
PS: Gypsum fiberboards are suitable for bathrooms. My main concern is the gaps and joints through which water vapor could potentially pass and then remain trapped in the insulation.
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