Spackling on top of plaster?

[Hans_H]

I have had an inset stove installed and the plaster work around the stove unfortunately did not turn out well for various reasons. Since we would like to have a smooth surface around the stove, the craftsman suggested that the best option would be to instead apply filler on the surface, which we think sounds good. The craftsman argues that there's no need to remove the plaster, as it can be applied on top of the plaster. To me, it feels like durability might become an issue, but I don't really know anything about plastering, so it's more of a guess. Does anyone know if this is a suitable solution?

 

[Galten]

I have had a built-in fireplace insert, and unfortunately, the plastering job around the fireplace wasn't done well for various reasons. Since we would like to have a smooth surface around the fireplace, the craftsman suggested that the best option would be to apply putty, which we think sounds good.
The craftsman believes that you don't need to remove the plaster; instead, it's possible to apply putty on top of the plaster. To me, it feels like the durability might be insufficient, but I really don't know anything about plastering, so it's more of a guess. Does anyone know if this is a suitable solution?

If you want a completely smooth surface, putty should be great for cosmetic purposes. However, I can't guarantee how it will react to large temperature variations?

 

[Hans_H]

If you want a completely smooth surface, filler should be great purely cosmetically. However, I dare not answer how it reacts to large temperature variations?

Thanks for the answer. Of course, temperature is also something one needs to keep in mind. Due to the design of the fireplace/installation, however, I'm not sure if the parts to be filled will get particularly hot. But I'm a bit unsure if it works to apply filler over plaster.

 

[Galten]

Thanks for that reply. The temperature is, of course, something to keep in mind. Due to the design of the stove/installation, however, I am not sure that the parts to be filled will get particularly warm. But I am a bit concerned about whether it works to fill on top of plaster.

It works fine! I have old plastered walls in my house, and I've repaired with regular filler where needed.

 

[Luddis_1]

No problem applying joint compound on plaster if it's a basement where there's moisture migration in the walls, just choose the right type.

 

[Hans_H]

No problem to putty on plaster if it's a basement where there's moisture migration in the walls, just make sure to choose the right type.

No, it's not in the basement. Thanks for the help!