I can see a wet band along the bottom, but without knowing how long it's been wet and how far the moisture has penetrated the panels, it's difficult to gauge their long-term condition.I would try letting it dry out and see what you got.

Things like foundation issues, leaks, moisture penetration, grading and drainage, mold, old wiring, corroded plumbing should have been addressed during the rehab.

But often they are also a source for moisture, water accumulation, humidity and worst of all - mold.If the structure was built properly and is not old, basement is a great asset.

Gentle ones, saying "Just had a baby, might have missed it, but don't have record of...etc.etc."

Yeah I have this same problem.Make sure you spend an extra couple bucks per tube and get the good stuff.It will be waterproof tight and the good silicone stays pliable and flexes when expands.This keeps the seal 100% tight.The cheap crap won't flex and then will start cracking and allow water behind it in certain spots.Will slow the leak down but not get rid of it completely.I would take this time to make sure where the ceiling is soft that there is no leaks coming from the tub drain,shower diverter,or shower head pipe behind the wall.Also it's not always the tub leaking.The toilet is usually close by to the shower.The seal at the toilet to the floor for sewer or the bolts from the tank to bowl could be bad or the seal for the flush between the tank and the bowl.The water can slowly run down the outside of the back of the tank under the sub floor.When you take the drywall off and look at the sub floor underneath you should see darker areas where the leak is more prominent.You can also use a moisture meter to determine the first point of entry for the leak.Make sure control valve and diverter are snug to the wall and sealed properly.Water can get behind there while taking a shower and cause a slow drip.

As they are all electric units (not gas), I don't have 220V service, in addition to the fact that washer/dryer can occasionally flood (4 units are on 2nd floor) as well as cost & moisture issues.I considered nad dropped the idea of coin op laundry given the buildings small size (6 units) and the fact that the outdoor "laundry shed" is not very secure and tenants constantly leave the shed door open and the coinboxes could be targeted, as well as I already have problems keeping neighbors from using it, etc.I am going to have the water company come out after closing, tell everyone to stop using water and they will check to see if the meter still spins - toilet leaks and faucet drips come to mind (I also wonder about possible main line water break, I had that happen twice in my life).

You want the moisture out.

Water/moisture is a place that can harbor mold.

In Dallas, and Austin, there is soil moisture change that often cracks foundations.

Silt will absorb moisture and likely expand (or contract depending its moisture content).