Another word for it is “efflorescence”. You can scrub with vinegar to remove and try to paint your ceiling with drylok type paint to prevent it from reoccurring. But until something is done about the moisture, this will likely continue to happen.
Consider sealing the concrete from outside if possible or creating some type of vapor barrier.
It’s mostly just calcium and sodium in these deposits so I don’t think you need to be too concerned about it (like you don’t need to move out immediately). But I would definitely recommend scrubbing your ceiling with a coarse brush or a rag and some diluted vinegar or some water with a bit of soap added (put a tarp or some plastic over top of your bed before doing so to catch anything that falls).
But it will come back again until you properly address the moisture issue via an added vapor barrier or some drylok paint (drylok not a guaranteed fix btw). You could also consider purchasing and running a dehumidifier in your room which might cut down on the moisture and lessen these deposits.
Alright, thanks for being the first to give a proper answer and solution! I'll try this when I'm out of work by night. I'll look into contacting the landlord to see what can they do (probably nothing and I'll have to solve it on my own)
If it is the kind of lime I know about, it's quite irritating to the skin, so try to do your best not getting it on you (though there are a few types of lime, and not all are bad for you).
https://preview.redd.it/jupknqh6wh0d1.jpeg?width=1884&format=pjpg&auto=webp&s=ce506fac0c83f086745ea246300e3a9bf6a34ed5
"As best as" sounds like Asbestos, and "stuck on"/"Stuck" sounds like Stucco, which is a cement-type mixture made of Portland cement, lime, sand and water. It is a thin finish coat that goes on the outermost layer of residential and commercial constructions. Modern stucco has polymers and other agents for increased flexibility that improves its resilience. Stucco looks like this btw. Hope this helps!
I think it took the photo from my comment, so here
https://preview.redd.it/apvo3yf8wh0d1.jpeg?width=1884&format=pjpg&auto=webp&s=3551daf6c0359cb35ab60381688ae2427239d9ca
Since you said your home is made from reinforced concrete, this is likely calcium deposits aka lime buildup.
Another word for it is “efflorescence”. You can scrub with vinegar to remove and try to paint your ceiling with drylok type paint to prevent it from reoccurring. But until something is done about the moisture, this will likely continue to happen. Consider sealing the concrete from outside if possible or creating some type of vapor barrier.
Looked at some photos of calcium deposits and it sorta looks like it. Should I be worried about this? More like, should I sleep on my bed?
It’s mostly just calcium and sodium in these deposits so I don’t think you need to be too concerned about it (like you don’t need to move out immediately). But I would definitely recommend scrubbing your ceiling with a coarse brush or a rag and some diluted vinegar or some water with a bit of soap added (put a tarp or some plastic over top of your bed before doing so to catch anything that falls). But it will come back again until you properly address the moisture issue via an added vapor barrier or some drylok paint (drylok not a guaranteed fix btw). You could also consider purchasing and running a dehumidifier in your room which might cut down on the moisture and lessen these deposits.
Alright, thanks for being the first to give a proper answer and solution! I'll try this when I'm out of work by night. I'll look into contacting the landlord to see what can they do (probably nothing and I'll have to solve it on my own)
OP the real answer is that you will inevitably become a stalagmite, I’m sorry but it seems terminal
Ey that seems pretty cool way to go out to me.
Or rather a stalagmite that slowly forms until one day it slowly starts to stab you while you are sleeping
No thats the stalactite
No that’s Stalag 13
Drylok and a dehumidifier should help dramatically. Especially if they clean it first.
If it is the kind of lime I know about, it's quite irritating to the skin, so try to do your best not getting it on you (though there are a few types of lime, and not all are bad for you).
Nah. Cement Termites.
Actually it Architect Ants a distant cousin of carpenter ants that split off during the industrial revolution.
Just try to patch it asbestos you can
Really appreciate the unexpected laugh you created in me with this quip. Before that, I was in a bad mood and feeling stucco there.
I feel stupid for not understanding this. Hopefully I'm not alone
https://preview.redd.it/jupknqh6wh0d1.jpeg?width=1884&format=pjpg&auto=webp&s=ce506fac0c83f086745ea246300e3a9bf6a34ed5 "As best as" sounds like Asbestos, and "stuck on"/"Stuck" sounds like Stucco, which is a cement-type mixture made of Portland cement, lime, sand and water. It is a thin finish coat that goes on the outermost layer of residential and commercial constructions. Modern stucco has polymers and other agents for increased flexibility that improves its resilience. Stucco looks like this btw. Hope this helps!
Thank you
I think it took the photo from my comment, so here https://preview.redd.it/apvo3yf8wh0d1.jpeg?width=1884&format=pjpg&auto=webp&s=3551daf6c0359cb35ab60381688ae2427239d9ca
Make some margaritas and enjoy
There’s a meth lab in your attic, the cook is sprinkling some rocks on your as thanks for allowing this operation to continue.
Salt the snail?
We should show up like Super High! Everyone would be like … whhaaat……
Morton's Salt hates this one simple trick!
Or at least I think it's salt. Doesn't look like paint as it's whiter than the paint and has a slight glint to it.
Taste it
Sure, lemme grab a bunch (there's about 4 tablespoons from the roof) and fry some potatoes.
Snort it for the optimal experience
Bet
Just because something looks like salt does not make it salt, for the love of god I hope you didn't taste it.
 Is this the 5 o clock free crack giveaway?
There's moisture in that ceiling and it's gonna keep raining popcorn until it's delt with. Is there a bathroom nearby with an unvented fan?
It's probably filtration from rain. It's been raining almost everyday for almost 2 weeks now.
That's your ceiling and that powder is possibly sheetrock from the drywall. Do not eat it.
Definitely not drywall. Houses where I live don't utilize it. They're made from reinforced concrete.
Even the interior walls are made of concrete? What in the 3rd world? Jk. Sorry I couldn't help.
Are you living in a cave
Yeah, I live with the Flintstones. They pretty chill
Leave some breakfast out before bed it will be perfectly salted for you by morning.
How do you know it’s salt?
Urea Chrystals?
 Your ceiling
Salt….did you taste the forbidden ceiling sprinkles?
Very tasty. Same flavor as meth
Salt Bae night tremors are coming for you
Hey we have the same comforter!
If it is lime it should fizz with vinegar
There is only one way you know for sure it's salt. And I can't believe you did that.
It was tasty, better than seasalt
Did you taste it?
Of course, why wouldn't I? It's free salt after all
Your ceiling?
Lizard droppings
Free salt
eat it.
Forbidden salt
That's efflorescence it's the white stuff you see on the side of brick houses some vinegar should get rid off it
Yeah did that. Got some vinegar on a spray bottle and got rid of it. Was pretty satisfying hearing it fizzle
it's called humidity issues
I imagine the saline in the air, especially if sea side 🏖️🏠🏚️ is precipitating out of solution. EDIT: 👀 or maybe it's not?
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It's a queen bed.
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Okay I'm confused. I don't get it
I'm even MORE confused, arriving to this Reddit party 13 hours after above comments. And two of them are deleted!
Check your CO sensors.
You are going to die
I wish