Baugreenhorn
2021-02-07 19:41:10
- #1
Hello dear people,
we are currently building a semi-detached house. Today we discovered rust stains on the concrete panels at the construction site. Some parts are already wallpapered – the rust stains are showing through the wallpaper.
The building substance is as follows: concrete at the four corners, in between [Kalksandstein]. The stains only appear on the concrete walls and partly on the ceilings.
Do you know where the stains come from or why there is rust, and what is normally done to prevent this? Seal before wallpapering? Should I be seriously worried about the substance and/or the statics (reinforcement is not visible)?
Thank you very much for your help!

we are currently building a semi-detached house. Today we discovered rust stains on the concrete panels at the construction site. Some parts are already wallpapered – the rust stains are showing through the wallpaper.
The building substance is as follows: concrete at the four corners, in between [Kalksandstein]. The stains only appear on the concrete walls and partly on the ceilings.
Do you know where the stains come from or why there is rust, and what is normally done to prevent this? Seal before wallpapering? Should I be seriously worried about the substance and/or the statics (reinforcement is not visible)?
Thank you very much for your help!