Hi,
I finished the damp treatment in my flat. I had to use some filler on the walls in the area between the new plaster (laid after the damp treatment) and the old plaster. Then I sanded the walls with a power tool and painted them.
When knocking the wall with my fingers I have noticed that in some of the areas I did put filler there is different noise like there is a cavity behind. On the surface it looks perfect.
Is this an indication of filler failure? What shall I do?
I finished the damp treatment in my flat. I had to use some filler on the walls in the area between the new plaster (laid after the damp treatment) and the old plaster. Then I sanded the walls with a power tool and painted them.
When knocking the wall with my fingers I have noticed that in some of the areas I did put filler there is different noise like there is a cavity behind. On the surface it looks perfect.
Is this an indication of filler failure? What shall I do?
