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DotAccomplished5484 t1_iumssy4 wrote

Reply to comment by nah-meh-stay in What is causing the damp on interior walls? by victor0nl1n3

My first thought also was a leaking drain pipe because of the limited range of the damage. A leaking water line would result in visible water, but the intermittent demand on a drain pipe would generate much less leakage. It also appears that the damage is where studs are. Almost certainly the damage shown in the photos showing the outlet is on a stud.

A roof leak is a slight possibility, but if it is a roof leak damage would also appear on the second floor.

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loverlyone t1_iumxbn2 wrote

Wouldn’t a leaking water line also be creating pools of water in the flooring? With other homes in the neighborhood experiencing similar problems, I’d look at water coming from below, particularly if OP’s house is built on a slab. If the entire street was built at the same time chances are the slabs were all poured with the same materials.

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