To be safe with anything except a fairly new house, you’d really need to excavate around the house, parge the outside of the foundation with an asphalt/tar product, install a dimpled plastic membrane over that, and then on the inside, fastidiously install rigid foam on the floor and walls, spray foam/tape all seams, etc… Then frame, then drywall.Seems ungodly expensive.

If just yours are gone and others remain, it's being done by your competition.Full disclosure, in my area if I see one of those cheap plastic signs that says "We Buy Houses" on it, it is HISTORY

The internals are mostly plastic, allowing them to easily be broken with a specialized tool, or even a screw driver, and show no external signs of forced entry.  

I got this tip from a floor re finisher, who even recommended covering the floor with plastic to keep the enzyme liquid in the floor for longer before evaporating.

I had the floor replaced and the guy put down a plastic barrier and used some "heavy duty" spray from Home Depot.

Same for the faucet, don't use a cheap model with a plastic body...get a mid range moen or pfister single handle NO Sprayer.

I tried a brand that was plastic.

Corey, Yes sorry, I thought it was the black plastic edging you put around landscaping.

Most cigarette filters are composed of cellulose acetate, a form of plastic.

Code where I am (TN) and in most areas call for 1 layer of 6 mil plastic.