Forum Title: Bumps on VCT
OK. I didn't see a VCT catagory so it gets thrown in with vinyl. While working at a school, I was shown this by the janitor. The tile is around 6 years old. He strips and finishes it yearly and the bumps are there after stripping also. I scraped some of the bumps and it appears to be tile material. It's kinda randomly scattered throughout the halls. What would be the culprit here? I was thinking that someone may have gotten something on it before one of his earlier finishes.
Category: Flooring Post By: NATALIE PARKS (Nashville, TN), 02/12/2019

I've seen this Darol. I always assumed something was leeching thru the concrete into the tile.

- AARON BROOKS (Lake Elsinore, CA), 05/09/2019

In the past, some have explained it as efflorescence, but it's usually a different type of lump than these. I've suggested that he pull one up and see if there's anything obvious from the back. If not, it's gotta be an issue with the surface of the tile or contamination. Wouldn't ya think?

- ANDREA REYES (Madison, WI), 04/01/2019

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