Hi Redditors,

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I rent a room and I found in the morning one of the ceiling corner is wet.

picture: [https://imgur.com/6rEwjOT](https://imgur.com/6rEwjOT)

closer: [https://imgur.com/jwzSDzC](https://imgur.com/jwzSDzC)

This corner is also the corner under the roof of a 2 floors + basement building. I am at the top room at the corner of the building.

like: [https://imgur.com/idD6KB3](https://imgur.com/idD6KB3) (similar but not exactly the same)

I contacted the landlord but she keeps saying: keep the room warm and dry. I showed her my thermometer. 17 degree and 53% humidity. She said the temperature is too low.

Personally I don’t believe it is caused by lacking of “Lüftung”, it is too wet and there is barely any mold.

I think it shall be other reason.

Could you please help to give me some hint? What shall I do.

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Thanks in advance!

4 comments

  2. Not a Gutachter, but yeah that definitely looks more like water leaking from above than it does condensation forming from within your room. You should insist she checks whatever is above it

  3. Even if you were not heating enough or ventilating enough that actually looks like water is coming from the roof. Does it drip down or feel wet to the touch? Does it feel cold to the touch?

    At 17ºC and 53% RH, the dew point is 7ºC. So the ceiling would have to be much colder than that only at that point to collect that much water. It’s true that this corner would be the coldest in the room, but even so, it shouldn’t be that cold. If you can get your hands on a laser thermometer you can measure how cold it gets in the corner.

    Also, you have another corner also under the roof against the outside wall, don’t you? Does it show similar symptoms? If not, my money would be on a damaged roof.

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