I’m also guessing there is poor ventilation in the bathroom (gets really humid when taking showers) and the same around your oven. It could be a plumbing leak, an enthusiastic bather, a roof failure or a siding malfunction. shellac primer, not kilz. The high iron content becomes more concentrated in the water droplets that form over the shower as the water evaporates. They renovated and repainted the apartment before we moved in. If they used premixed mud ... comes in a bucket, looks like thick mayonaise ... it will be water soluble for the rest of its life. Here are more close up pictures. Yellow ceiling stains are often the result of water damage or smoke. Once the problem is solved, put on safety glasses and gloves and blot the stain with a mixture of one part water and one part bleach. I also just boiled water in my kettle and noticed similar yellow condensation stains on the backsplash in my kitchen. This used to happen all the time in our farmhouse in Indiana. Water stains can either suggest an ongoing leak or a previous leak. Is this something toxic? OP: oil based kilz. This happens when insulation in the attic is insufficient. Left untreated, the mold stain may grow and become darker over time. Probably residue from the former smoker tenant. While it’s not always possible to determine exactly what caused a ceiling stain, the location of the stain will often give away what caused the stain. I cleaned it up, but when I went downstairs I noticed the ceiling in the living room was cracking (think it was only paint though) and other parts near were starting to give but never actually opened up to a crack. Hi, I have recently painted a room (wall and ceiling) in white emulsion. Don't know what to do with mold, if any has formed in the ceiling. If it's just the ceiling, it's likely from using improper paint. I tried wet scrubbing some of the spot stains, which was in thin mudded area at the edge of patch where it is simply mudding over existing painted drywall (below the actual patched hole, above outlet/switch), and it seemed to just wipe/scrub the mud off. This has got to be the most disgusting type of ceiling stain if you ask me. I'm also guessing your whites come out with a bit of a red tint too. Water could be running down the pipes and then dripping on the ceiling away from the leak. The second cause of ceiling discoloration may be related to moisture, but is not directly caused by it. What's a good alternative? I bought it new. Yellow stains and efflorescence are sure signs of a water leak. If it looks to be a leaky radiator, search out and fix the radiator body, valve, pipe, … How to Get a Colored Stain Out of the Ceiling. Grease or paint can easily be cleaned off. Use a bleach/water solution to blot and wipe the stain away After the area dries, if it is still stable, you can directly paint over the area Remove the damaged part of the ceiling/ceiling tiles, drywall and replace with new, clean sections Sand off the damaged layer and seal the area (wood ceiling) IF it's a water stain you'd need to prime with a solvent based primer to seal the stain. Common Sources of Ceiling Stains If you can’t identify a possible water source above the ceiling stain, you may have a leaky pipe. We used kilz. You need an oil based primer for tobacco tars. We always just used Kilz Premium (specially with smokers). I use it all the time for painting knotty pine. Ice Dam Leakage: If stains appear at ceiling corners or outside walls, the most probable cause is ice dam leakage. My toilet leaked and I caught it about 20 minutes later. And then it drips down onto your ceiling creating nasty water marks. It's also dripped down to the tub after a shower as well. There are two main ways to attack a water stain on a popcorn ceiling – drawing the stain out or covering it up. The condensation forms because hot, humid air is coming into contact with cold air ducts. The source may be distant from the visible stain. Use B.I.N. The simplest thing to do is to locate the wet insulation above the water stain and then inspect the decking material directly above it. The leakage source can be easy hard to pin down when the water dripping directly downward from above the stain on the ceiling. By simply covering up the stain without addressing the cause of the leak, you will run the risk of serious structural damage. Is the roof above, is there a bathroom above? Small plug in fan? Looks like you're using new Reddit on an old browser. https://en.m.wikipedia.org/wiki/Surfactant_leaching. When it comes to a water damaged ceiling, there are pretty clear signs that indicate water damage. You can get it wet and it goes soft. In summer, when the air conditioning is on, the reverse happens. If this is your problem, then adding ceiling insulation, especially near the eaves, can take care of this. Not necessarily a home improvement post.. not sure what the best subreddit is. My dad thought about painting the ceiling and walls with swimming pool paint, which was actually a great idea if that’s doable for you. For the past few weeks, I have noticed a slowly growing water stain on the bedroom ceiling drywall. After showering I notice yellowish drip stains on our bathroom ceiling. Wipe it away a few times and it shouldn't come back. Good to know, thanks! It’s as simple as that. If you can’t identify a possible water source above the ceiling stain, you may have a leaky pipe. Edit: The killz is good stuff, but if you’re going to paint, the zinsser bin shellac will do a much better job of sealing the tar off so you don’t have this problem again. Clearly, you don’t want to ignore this. When enough condensate accumulates, it drains to the bottom, leaks through the fan, and stains the ceiling. Technically, it’s not a stain but rather a… She was a heavy smoker but quit 5 years ago. the test suggested by one of the responses, ie to put a drop of water on the grout and observe it's absorption rate, is a good one and to be tested. If you are new here, please review posting/commenting guidelines. Much like a glass of ice water on your table will get wet on the outside. Update 2: thanks for the gold Anonymous! This is guaranteed to happen 100% of the time when someone smokes in the house. Water stains on ceiling, especially if they are yellow or darkish green, can result in mold growth, or even worse, ceiling damage. Is there a crack around the two yellow spots? When a portion of the ceiling stays damp for an extended period of time, a yellowish brown mold stain can form overhead. That means the actual leak can be a very long way from where the water eventually made its way down to stain the ceiling. There was another bathroom in the house that my parents shared but it had a fan in it, and this issue didn’t occur there. After a heavy rainfall snow may accumulate on the roof and in absence of proper insulation, melts down and shows up as ceiling stains. We still get a tiny bit that comes through on occasion but the correct primer should eliminate it mostly. After showering I notice yellowish drip stains on our bathroom ceiling. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! I always just assumed this was some sort of mold that was growing in a humid bathroom (I like really hot showers). Contractors did the patching yesterday. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. And no one has ever smoked in my house. The yellow should just wipe right off. Smoking tar residue shows up on walls and ceilings. Any help would be appreciated!! Unless there were stains there prior to the patch work I wouldn't worry about it - latex paint will hide the discoloration. Normally these stains look “rusty” or a “brownish” color. A logical approach can help you quickly locate the source. Lick it off. Is there anything better than “smoking on the John?”. The latex stuff, if it is residue from tar, will bleed through latex. I don’t think it’s bc of a smoker, mainly bc my bathroom upstairs does the same thing (not that big of dots) sometimes and we 100% demo’ed the bathroom to the studs. ... so the cause of the stain and leak does not have to be directly above where the stain or wet spot appears on a ceiling. But once it’s painted, the only way moisture can get to it is from inside the wall. HOWEVER, the metal ceiling fan vent also has some of the droplets, and it was not painted with the ceiling paint. I read somewhere online that maybe the stains are caused by a high metal content in the bathroom water and the metal is left on the ceiling from the steam. So thats why it seemed soft when you were washing it with the wet cloth. I’m guessing the people who painted used a alkyd or oil-based enamel and not a latex enamel paint.