Not necessarily chief.
Edit: Page 2
From the link posted by the OP, see page 2 specifically Concrete Subfloors. This is the stuff he bought. It can be installed both over an underlayment or by glue. Last page details glue down.

If you glue it, you need to test it. Technically speaking, if the moisture transmission rate is to high it'll warp even if it's not glued.

This post was edited on 6/7/16 at 10:51 pm

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Posted by UKWildcatsFAN

Bowling Green

Member since Sep 2011

5690 posts

Posted on 6/7/16 at 10:59 pm to elprez00

That is true. Any mastic can lose its bond strength when it encounters moisture.

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Posted by elprez00

Hammond, LA

Member since Sep 2011

29436 posts

Posted on 6/7/16 at 11:08 pm to UKWildcatsFAN

Just for your reference, there are many types of vinyl tile that can be installed floating. Sheet plank can be. Hell Armstorng makes a product you can grout like ceramic tile.

But you'll be hard pressed to find anything that will not require a calcium chloride test. Specs on the school were building now state it can't exceed 3lbs/1000sf/24hrs, I looked at it with my superintendent actually this afternoon. Even if you install it floating, if the moisture content is too high you can still have issues with buckling and swelling. Obviously commercial works a little different, but the concepts are still the same.

I know this sounds lame, but It's important to read and follow the instructions.

This post was edited on 6/7/16 at 11:10 pm

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Posted by CHEDBALLZ

South Central LA

Member since Dec 2009

21961 posts

Posted on 6/8/16 at 6:55 am to Cracker

quote:
if you need self leveling thinset & you are diy
You are in over your head it's gonna blow up on you

This I can agree with. After watching the flooring guys lay that stuff down I am very glad that I had them install it. My house was 11 years when we had it laid down. I thought my slab was pretty flat but these guys came with straight edges and looked for low spot and made it perfectly flat.

They then put a layer of glue, then the vinyl. The vinyl is about 3' long and 6" wide and looks great. We get compliments on it often. When we picked our floor the guy sent us to a couple different places around town to look at some of their installs. One was a yoga gym, a spin class room and a restaurant. All of them looked great so that's what we went with.

A big plus is that after a week of being laid down its pretty much waterproof so if you flood or spill anything it will not ruin your floors. We were shown some pictures of a flooded pool house with vinyl floors. The owners of the house cleaned it out and mopped and it looked brand new.

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Posted by the4thgen

Dallas, tx

Member since Sep 2010

1781 posts

Posted on 6/8/16 at 7:09 am to Croacka

quote:
Their should be a vapor barrier under your slab

This is the correct answer. You shouldn't need to have a second barrier between the flooring and the slab. Are you seeing moisture on the top of the slab now?

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Posted by GatorBaiter

Member since Apr 2016

16 posts

Posted on 6/8/16 at 8:41 am to the4thgen

quote:
Are you seeing moisture on the top of the slab now?

No moisture. The power was off for a few days when we first took over the space, and still didn't see anything.

The floor will be floated as well. We had a general contractor out today to look at a few other things we'll need done, and after looking at it he confirmed what everyone has been saying. Just go right over top of the concrete.

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