Hello everyone,
I’m not sure if this is the right subforum, but I couldn’t find a more suitable one.
On a living room wall (plastered and painted), which is at a right angle to a window front, I noticed a small spot in the summer that seems to be caused by moisture. There were efflorescences present (similar to salt deposits).
I suspect it came from pressure washing the terrace, meaning moisture somehow got through.
Two weeks ago, we wiped off the efflorescences with a cloth and repainted the area. Now the spot and the efflorescences have returned. When I touch the area by hand, it feels like it’s not damp. But I might be wrong.
I don’t know where moisture would be coming from. There are definitely no pipes running there. Also, the terrace stays completely dry even in heavy rain because there is an open conservatory above it. It also can’t be coming from above between the conservatory and the wall, because the spot is at the bottom.
Question:
Could the efflorescences have returned because they were possibly not completely removed, similar to mold that regrows?
Or could it only be new moisture?
I’m not sure if this is the right subforum, but I couldn’t find a more suitable one.
On a living room wall (plastered and painted), which is at a right angle to a window front, I noticed a small spot in the summer that seems to be caused by moisture. There were efflorescences present (similar to salt deposits).
I suspect it came from pressure washing the terrace, meaning moisture somehow got through.
Two weeks ago, we wiped off the efflorescences with a cloth and repainted the area. Now the spot and the efflorescences have returned. When I touch the area by hand, it feels like it’s not damp. But I might be wrong.
I don’t know where moisture would be coming from. There are definitely no pipes running there. Also, the terrace stays completely dry even in heavy rain because there is an open conservatory above it. It also can’t be coming from above between the conservatory and the wall, because the spot is at the bottom.
Question:
Could the efflorescences have returned because they were possibly not completely removed, similar to mold that regrows?
Or could it only be new moisture?
We had water under the screed, and where the water had risen up the walls, it looked exactly like your picture! And no, it was not only on the wall where the water had entered, but also completely on a wall on the opposite side of the house! I don't want to cause alarm, but have it checked!