ᐅ What to do if a new wall cannot be painted

Hello everyone,

I wanted to repaint a 4-year-old drywall in the nursery, which is white, to refresh the color. Before I started, there were no issues! Now I have painted the wall three times, but I still can't get rid of the strong streaks. On closer inspection, I noticed that part of the wall can be painted flawlessly from floor to ceiling, while the rest cannot: here, there are not only streaks but the surface texture is different and rough.

Could this be a defect? Could the builder have done a poor job here? Perhaps they didn’t fill, sand, prime, or something similar?

Does anyone have an idea what might be wrong with the wall and why it shows such strong streaks?

In the picture, you can see that the right half is clean. However, the left side is completely covered with stains from floor to ceiling. These also do not disappear when painted over.

Best regards
Sergio

Is this an older building or a newly constructed one? How was the room used before?
Could the area have been treated differently before, perhaps with a latex paint?
Or are there grease stains? Was hairspray or ironing aid used there, causing changes to the surface texture?

Personally, I am only familiar with emulsion paint, but I know that different types of paint often do not adhere well to each other.
Additionally, problems can arise if there is no primer applied on raw drywall or plaster. It is interesting that one part works while the other does not.
Perhaps applying a primer could help!

ypg schrieb:

Is this an old or new building? How was the room used before?
Was that area possibly treated differently before, maybe with a latex paint?
Or are there grease stains? Was hairspray or ironing spray used there, causing a change in the surface texture?

Personally, I only know about emulsion paint, but I am aware that different types of paint do not always work well together.
Also, if no primer is used on bare drywall or plaster, problems can occur. It's interesting that one part works while the other does not.
Maybe priming will help!

Hello, it’s a new build. The room was almost empty before and was waiting for a child. The walls were clean, and before painting there was no indication that what was planned as 30 minutes of painting would turn into a major project. I am therefore facing the following questions:

1) Why did the wall look perfect at the handover?
2) What are these stains and streaks?
3) How is it possible that multiple coats of paint have led to such a disastrous result?
4) Should the developer be responsible for making corrections here?

So many questions and so few answers ))

sergio_b schrieb:

Should the developer be required to fix this?

We don’t know what was specified in the contract. Who was responsible for the painting work?

Warning, assumption: A lot of filler was applied afterward at this spot. The filled surface may not have been primed? Solution: Sand again (first coarse, then fine), then prime, then paint again.

The cause here seems to be moisture. How long ago was the surface painted in the photo?
It might also be related to the paint. I cannot identify any workmanship defects like this. It looks like everything is too damp.
You should possibly measure the humidity in the room and heat it properly.

If the stains do not dry out, apply a primer before repainting. Then paint again.