Quote:
Originally Posted by Hondaracer
I’ll post a mode in depth opinion later when I’m at my computer, but looking at it is appears a to be a relatively straight line as opposed to a huge puddle etc.
So, what that leads me to believe it may be a grout line or the caulking in and around the tub, whether that is at the base of the tub where the floor butts into it, or around the top of the tub where the surround/tiling is. It’s hard to tell though because it may be dripping from somewhere else and simply running along the floor and then dripping causing that line.
Do you know what is directly above that spot? Is it the tub, toilet, etc? You could try and take the light fixture down and see what kind of electrical box is there, it may be possible to remove the screws from the electrical box and push it back up into the ceiling and either reach up into the cavity or fish a camera up there (depending on the way the joists run though you may not be able to see much)
Really the only way to get the bigger picture is to cut a whole in the ceiling which really sucks since your ceiling is textured there and it’s cirtually impossible to match the texture of the older ceiling.
So there’s kinda two options, you can try and find where the water is leaking, weather that be around the toilet, a caulking line etc. and try to stop the leak and eventually the ceiling will dry out and you could just paint over it a bit. Or do the full investigation, address the issue properly (could be leaking pipes which will never be resolved without opening the ceiling)
Shitty thing is opening the ceiling is gonna be like a few thousand once you’re done probably
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The straight line of the stain is far more likely to be from the water following a joist, not because there is a straight line above the next rooms subfloor.
Only way to know what's causing it, if the upstairs bathroom doesn't have an obvious leak, is to start opening things up.