That thing will stay on until the bathroom is super dry.

sitting on dry land.

Once dry, apply paint on waterproofing. 

What happens is the clay dries and cracks and then gets moisture and swells.  

It can sometimes mean removing dry wall, AC ducts or cabinetry if its spores have become embedded and spread into surrounding areas.

I am a real estate and laundromat investor.If you are purely looking at the property as a real estate investor (no intent to run the laundromat), just make sure they dont do dry cleaning on premise.

If you don't have an easy path to a ditch or storm drain you might be looking at installing a dry well to handle the rain so you don't just drain right onto your neighbor.

Two, buying on ROI, even if they have a decent house in a decent neighborhood, either they or their property management company cut corners and don't maintain the house properly and it starts to look "rental-ish" in a neighborhood with lots of owner-occupants.Three, they or their property management company fails to adequately screen tenants, resulting in a trashed property that the investor may not reinvest in to fix up to neighborhood standards, becoming a blot on the neighborhood.Four, the property management company may blatantly rip off the investor, pocketing the rent, the repair funds, and renting out the now crappy house to any derelict who can pay a few hundred dollars a month.Astute local investors don't usually make these mistakes. 

TL;DR – I bought a house and the seller hid a defect, do I have legal standing to ask the seller for help with the repair costs?

So compare this: “I’m looking for a laundry proposal that is 7 years with new top load washers, rebuilt dryers, priced at $1.75 to wash and $1.50 to dry and with zero upfront money and the highest commission I can get.”To this: “I’m looking for the best deal I can get.”Which do you think gets a better deal?