ᐅ Painting the Utility Room – Which Type of Paint? Latex Paint?

Created on: 30 Aug 2018 23:37
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sco0ter
Hello,

Our plasterers recommended painting our utility room before installing anything there, such as the heating system, sink, surface-mounted outlets, electrical panel...

They said it would be much easier and look better afterward, because you wouldn’t have to paint carefully around small details. That makes sense.

The question is whether we should use a special type of paint. This is a room where laundry is also dried, the heating is installed, and water is used.

Should we use latex paint because of that, or is regular paint sufficient?

Additionally, the room has only a small basement window.

And the second important question: does the plaster on the ceiling and walls need to be completely dry before painting? If yes, how can I tell if it is dry enough?

The plaster is a roughcast.

Can you simply paint over that? Should we consider using a special paint for that as well?

The screed will only have been laid for a few days, but I think that shouldn’t matter. A cement screed was chosen here specifically because of moisture.

Thank you very much for your advice!
S
sco0ter
2 Sep 2018 21:41
Yes, I was obviously aware of that when I made the purchase. I had also roughly calculated about 50 square meters and assumed that 80 square meters would be enough. But now it doesn’t matter, I probably applied too many coats anyway.

What is worse, though:
I didn’t prime the surface. I simply didn’t know, or I thought it wasn’t necessary (only for concrete, and the interior plasterers didn’t mention it either)... but someone else has now pointed it out to me.

Second mistake: I probably should have used silicate dispersion paint (instead of dispersion paint)!? The posts online are not very clear about this.

What do you think?

I am now somewhat concerned that the moisture, which might still be in the plaster or masonry, cannot escape and that mold could develop, and that the paint might peel since I didn’t prime.

By the way, it is a lime-cement plaster.
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Nordlys
2 Sep 2018 21:43
That will dry out. Dispersion paints are not completely airtight, they are not lacquers.
I painted our utility room twice with sto basic, without primer, and nothing is peeling or molding.
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Bookstar
2 Sep 2018 21:52
Why prime at all? You don’t have to. For concrete, you can apply a deep primer, but even that is not absolutely necessary.
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sco0ter
2 Sep 2018 22:03
Bookstar schrieb:
Why prime at all? You don’t need to. For concrete, you can apply a deep primer, but even that is not always necessary.

Someone must have unsettled me a bit. I then read that priming is needed for porous, sandy, chalky walls. The lime-cement plaster was quite dusty when you wiped your hand over it. So...

However, I also just checked the technical data sheet for the paint. It states that no primer is necessary for lime-cement plaster. *Happy*

The plaster is a good 4 weeks old. That also fits the description (should be at least 4 weeks old).

So it seems I did everything correctly after all.

Thanks to you all!
K
Kekse
2 Sep 2018 22:31
sco0ter schrieb:
Why is it recommended to always paint the ceiling starting away from the window? I did it that way, but I think it would look just as good the other way around.
When painting, you continually overlap the already painted area. If the paint has started to dry a bit, this creates a slight ridge, similar to when you offset sheets of paper. If this "sharp edge" faces the light source, it’s not a problem, but if it faces away, it casts a shadow that becomes visible. It’s basically the same reason why wallpaper is applied starting away from the light.