CarlD - plumber's whatsit under steps?

[AnnaK]

Carl, some long while ago you mentioned something for under the steps in an AGP. Plumber's vinyl? Plumber's mat? Plumber's something . . . and I can't remember.

We have to relocate the steps due to the washout directly next to their original location. The old Yoga mat I had been using is pretty ratty now, after all these years, and I'd like to replace it. What is the material you mentioned?

[BigDave]

Shower Pan Liner. It's 40mil thick soft PVC. Usually on a reel in the tile section of your favorite Big Box Home improvement store. It's gray and printed on one side.

[AnnaK]

Thanks! I had sent an e-mail to Carl and yes, that's the product. He called it Plumber's Vinyl. I'm off to the store.