Forum Title: Membrane Under VCT
I went to look at a job today in a local post office where some of the tiles were coming up. Most of it looks like efflorescence causing the problem. But, after looking closer, I noticed that there was a membrane under the VCT that looks like aluminum foil on top and the bottom is white. There's about a 1/4 webbing in it too. (I'm assuming it's to encapsulate the asbestos beneath it.) It was fastened somehow to the older VAT, then that was gone over with VCT. It's now coming lose in several places. I've never seen this before and was curious what a guy would do here. I'm sure when pulling up the tiles that need replacing, I'm gonna be damaging the membrane in the process. Anybody have any experience with this setup?
Category: Flooring Post By: BILLIE DENNIS (Clarksville, TN), 02/06/2019

Maybe, Run Forrest, Run. Seriously, I have never heard of anything like that.

- PATRICIA JOHNSON (La Habra, CA), 05/22/2019

There's been moisture barrier membranes over the years like what you describe but they're not for VCT. Someone may have improvised a solution. Scrape it all up, match the thickness of the membrane you're scraping with felt paper or anything you can find. You'll have to improvise. Worst case scenario you use patch. That's tough to make perfect but sometimes it's all you can do.

- GARY M (Fresno, CA), 05/13/2019

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