Hello,
After completing our new build, there is one remaining issue that nobody seems to take responsibility for. Next to the screed angles of the staircase, there are ugly gaps of about 1 x 10 cm (0.4 x 4 inches). These appear on all three floors, sometimes on one side and sometimes on both sides.

The architect had arranged for a company to apply PU (polyurethane) joints, but they never showed up. Now that we have a bit of time, we want to fix it ourselves.
What would you recommend? PU joint or something else?
Regards, Nicola
After completing our new build, there is one remaining issue that nobody seems to take responsibility for. Next to the screed angles of the staircase, there are ugly gaps of about 1 x 10 cm (0.4 x 4 inches). These appear on all three floors, sometimes on one side and sometimes on both sides.
The architect had arranged for a company to apply PU (polyurethane) joints, but they never showed up. Now that we have a bit of time, we want to fix it ourselves.
What would you recommend? PU joint or something else?
Regards, Nicola
T
Teimo198811 Nov 2025 10:27I would either cut a strip from a tile and fix it with, for example, PU adhesive, or grout the entire area and then seal it with the tile silicone.
On the upper floor, there are no tiles, but rather parquet flooring. In terms of color, either white (to match the wall) or anthracite (to match the staircase) would fit best.
So far, I have not used either PU sealant or silicone for grouting and therefore have no practical experience with how to achieve a neat finish.
So far, I have not used either PU sealant or silicone for grouting and therefore have no practical experience with how to achieve a neat finish.
Applying silicone over the entire surface won’t create a smooth finish and would most likely look unprofessional.
I would suggest inserting a suitable piece of steel into the gap, assuming the angle bracket is also made of steel, and painting it in the appropriate color (anthracite). Then seal the joint to the wall with white acrylic, which can be painted over with the wall color if needed. The silicone joint between the wall tile and the floor is already damaged, so replace that last and use it to conceal the transition to the steel.
Alternatively, a continuous thin cover strip could be installed over everything, for example, a properly coated sheet metal panel. This way, the gap behind the panel could simply be left as it is.
I would suggest inserting a suitable piece of steel into the gap, assuming the angle bracket is also made of steel, and painting it in the appropriate color (anthracite). Then seal the joint to the wall with white acrylic, which can be painted over with the wall color if needed. The silicone joint between the wall tile and the floor is already damaged, so replace that last and use it to conceal the transition to the steel.
Alternatively, a continuous thin cover strip could be installed over everything, for example, a properly coated sheet metal panel. This way, the gap behind the panel could simply be left as it is.
nocotool schrieb:
In addition to the screed angles of the staircase, there are still unattractive gaps of about 1x10cm (0.4x4 inches). They appear on all three floors, sometimes on one side, sometimes on both sides.What is this black thing? Your headline about the problem is somewhat confusing.Similar topics