ᐅ Retrofit interior insulation, bay window extension, mold issues
Created on: 3 May 2012 12:09
M
MS177Hello everyone!
In my apartment (ground floor, built in 1993, solid construction, concrete ceiling), there are currently wooden panels on battens under the ceiling, with shadow gaps at the edges—except in the bay window area. There, above the full-height window units, there is about a 10 cm (4 inches) wide strip of “nothing” = painted concrete ceiling. It’s not immediately noticeable but does not look good. Since I want to replace the wooden ceiling with drywall, it makes sense to close this gap. However, I have occasionally had minor mold issues there—just slightly superficial on the concrete ceiling, probably caused by thermal bridges/dew point (bay window projection, reinforcement “shows” through slightly, bay window roof presumably not insulated or poorly insulated).
Now the question is: should I simply install drywall normally up to the window element and hope nothing grows underneath, or should I additionally insulate the cavity ceiling in this area from the inside? And if yes, how and with what? Essentially, I would only need to insulate the projection area (the rest of the surface has a heated apartment above), but this area is not airtight connected to the rest of the apartment ceiling. Would it then need to be separated somehow?
In my apartment (ground floor, built in 1993, solid construction, concrete ceiling), there are currently wooden panels on battens under the ceiling, with shadow gaps at the edges—except in the bay window area. There, above the full-height window units, there is about a 10 cm (4 inches) wide strip of “nothing” = painted concrete ceiling. It’s not immediately noticeable but does not look good. Since I want to replace the wooden ceiling with drywall, it makes sense to close this gap. However, I have occasionally had minor mold issues there—just slightly superficial on the concrete ceiling, probably caused by thermal bridges/dew point (bay window projection, reinforcement “shows” through slightly, bay window roof presumably not insulated or poorly insulated).
Now the question is: should I simply install drywall normally up to the window element and hope nothing grows underneath, or should I additionally insulate the cavity ceiling in this area from the inside? And if yes, how and with what? Essentially, I would only need to insulate the projection area (the rest of the surface has a heated apartment above), but this area is not airtight connected to the rest of the apartment ceiling. Would it then need to be separated somehow?
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