This should be / is with proper understanding a huge risk mitigation strategy for banks / private money partners.The foundations are part of the price of the modular home and are a fairly unique design down here as they are slab with piers and walls put in place with watertight sealer to develop a crawlspace under the home.

The top sheet has glue on it, which gives an air and water tight sill to them.

I'd also consider going with just a tub if you don't have a good plumber who can replace it with a water tight shower pan or surround.

Vinal planks overlap each other with a fairly strong adhesive creating what I imagine to be a water tight seal.

There are multiple basement water leaks whenever it rains.This owner got this place temporarily watertight and painted the ceilings, and now is trying to pass a bad investment off to you and make $150K off the handyman work it took to get the place presentable.

I'm working on an EXTENSIVE and water tight lease agreement, as well as, setting up my systems to automate a lot of things like maintenance agreements and avoid phone calls while I work my full time job.Tenants can be idiots just as much as they can be angels but don't let that cause you to clam up and start paying someone.

When installed correctly it is water tight and you can also market it as one of the newest water proofing materials you can use currently.

They can be had fairly cheaply, are water tight, and easily modified. https://www.thewaywardhome.com... 

Window and door framing to be built out and capped as required to ensure a water-tight condition.3.

Verify it's not structural and that you'll still be watertight and tear it down!