I finally figured out why my LVP floors kept cupping after 6 months

I had a job in a basement last year where the planks started lifting at the edges. Customer was mad, I was stumped. Turned out the concrete slab had a moisture reading of 8% but I only checked it once. I stopped using a pin meter and switched to a calcium chloride test. Now I always wait 3 days for the results before I lay anything down. Anyone else have a job go bad because you rushed the moisture check?

3 comments

3 Comments

abbyf791d agoTop Commenter

Read a post from a flooring pro who said the same thing happened to him until he started using the calcium chloride test for basements. He said the pin meter can miss moisture deep in the slab even when it shows dry on the surface. Now I always do both tests just to be safe.

blake_kelly1921h ago

Learned that one the hard way myself, after ripping up a perfectly good floor lol

hernandez.gavin14h ago

Ehh, I don't know if it's really worth all that extra work for most jobs. A pin meter has always been good enough for me and never had a comeback yet.