Hello everyone,
The lime-gypsum plaster was applied in October/November (the screed and underfloor heating are still to be done). Today, we wanted to remove some outlet covers. When knocking off the plaster, it crumbles into fine powder (like falling sand). Is it normal for this type of plaster to be so soft? Even the slightest impact would cause damage, wouldn’t it? Should we have used gypsum plaster instead, or is this a quality issue? (In the bathrooms, there is lime-cement plaster, which is noticeably harder but also partly crumbly when chipped off).
Wintersonne
The lime-gypsum plaster was applied in October/November (the screed and underfloor heating are still to be done). Today, we wanted to remove some outlet covers. When knocking off the plaster, it crumbles into fine powder (like falling sand). Is it normal for this type of plaster to be so soft? Even the slightest impact would cause damage, wouldn’t it? Should we have used gypsum plaster instead, or is this a quality issue? (In the bathrooms, there is lime-cement plaster, which is noticeably harder but also partly crumbly when chipped off).
Wintersonne
W
Wintersonne17 Mar 2020 18:50Thank you for your feedback!
@guckuck2: maybe I am indeed expecting a bit too much from a plaster
@guckuck2: maybe I am indeed expecting a bit too much from a plaster
bauenmk202017 Mar 2020 19:15Have you also tried at a different location, specifically where there is solid masonry behind?
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Wintersonne17 Mar 2020 19:43bauenmk2020 schrieb:
Have you tried a different spot, where there is just solid masonry behind? Not yet, I will try that tomorrow and also hammer in a nail. However, I think the “consistency,” the crumbling, is not related to the backing behind it. If you slightly enlarge the cutout for the electrical outlets, it keeps crumbling. The lime-cement plaster in the bathroom tends to fall off in “larger chunks” when knocked and requires more force to break or punch through. But as I said, I don’t know how it should behave with a lime-gypsum plaster.
bauenmk202017 Mar 2020 20:00We are also getting a similar plaster, but it will take some time before it’s ready here. I think a plasterer would be the best person to help you. From my layman’s understanding, I would say that this plaster probably has a higher lime content. Do you have more details about the plaster you are using (e.g., a photo of the bag)?
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Wintersonne17 Mar 2020 20:18The plasterer himself will probably say that this is normal... Unfortunately, I don’t know who else I could ask on site. My thought was also that it might be due to the lime content. Maybe I’ll just call a plastering company tomorrow and ask for advice...
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