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-   -   crack fill under LVT (http://www.johnbridge.com/vbulletin/showthread.php?t=124233)

Bied10 12-06-2017 01:32 PM

crack fill under LVT
 
HI all. I know this isn't ceramic, but you all have never steered me wrong on any flooring advice.


I am going to lay glue down LVT over concrete (12 years old). I need to fill the expansion joints with something. I have thought about Silka because the cracks would still be able to expand and contract but "everyone" says to use a concrete patch. If I used concrete patch, the cracks will no longer work like they are supposed to.

My one big concern is if I use Silka (or something else that is flexible) will the LVT crack when a chair rolls over it or high heels (because you know how often people wear high heels in your basement).

Just looking for some advice from guys I trust. Thanks, Mike

mabiedenharn@gmail.com

Kman 12-07-2017 01:53 AM

How wide are the joints? Is it conceivable that something could rest on that crack and sink in?

Technically, you should use a solid material, like a cement-based compound to fill that joint, or leave it open and use a manufactured joint on top. Of course, if this is in the middle of a room, nobody wants that.

I would consult the guys over at The Floor Pro about this. There are several vinyl/linoleum installer's there that do thousands of feet every month. Tell them I sent you. ;)

Bied10 12-07-2017 04:52 PM

The joints are about 3/4" wide and about 1/2" deep. Each has a crack at the bottom (as designed).

There is a good chance of a chair rolling over them in one room, that is what I am worried about. All the recommendations are for a latex fortified cement fill, but that makes the cracks not work as designed.

I will ask your guys and tell them you sent me. Thanks.

(I will let you know what they said )

Mike

cx 12-07-2017 08:32 PM

Quote:

Originally Posted by Mike
I need to fill the expansion joints with something.

Quote:

Originally Posted by Mike
The joints are about 3/4" wide and about 1/2" deep. Each has a crack at the bottom (as designed).

Mike, what you're describing sounds more like a control joint, rather than an expansion joint, although I can't imagine what they were thinking in making it 3/4" wide and only 1/2" deep. A control joint's depth is usually a minimum of 1/4 the thickness of the SOG and no wider than a saw cut or grooving tool width.

I've not had any vinyl installed for years, but as I recall we just filled control joints with a Portland cement patching material and tiled over them.


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