AskAuntBirdy t1_j6ofl19 wrote on January 31, 2023 at 7:41 PM

Are there gutters/downspouts outside that corner of the house? Looks like moisture penetration. Check to see if water is pooling up to the foundation in heavy rains too. Need to get the exterior corrected before working on the interior.

xhurrhurr OP t1_j6ohlto wrote on January 31, 2023 at 7:53 PM

The wall is on both sides on the inside. There is also no reason for any wires or pipes to go through. The picture is around here

MadSciTech t1_j6olk8d wrote on January 31, 2023 at 8:18 PM

Could your roof be leaking and water is dripping down into the wall?

carl63_99 t1_j6ome3b wrote on January 31, 2023 at 8:23 PM

Or seepage from underneath? I would guess some moisture testing to find the source. Fix that, then fix this wall.

xhurrhurr OP t1_j6on2cz wrote on January 31, 2023 at 8:27 PM

hold on - I didn't consider that.

The house has a basement underneath but not under the whole house. THe basement is very wet and when it's raining strongly, the water pushes through one of the inner walls. It is exactly below this spot!! And the outside is also inclined towards the house. If puddles build up outside, the water flows right into the wall.

This is actually a pretty good guess, holy shit. I have to think about that.

xhurrhurr OP t1_j6om6nf wrote on January 31, 2023 at 8:22 PM

No, another living room above.

AskAuntBirdy t1_j6p4wt7 wrote on January 31, 2023 at 10:18 PM

Are there any bathroom fixtures on or near the common wall? Like a sink, tub or commode? Other option would be termites? They can get into the center of a home through cracks in foundation, they typically will be in walls with moisture damage. I’d suggest having a licensed plumber inspect the areas for you to pinpoint what all is going on to help get it resolved.