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Old 09-30-2012, 02:17 PM   #1
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VCT on subfloor, need backer board?


Hi all,

I'm about to install VCT in a closet. The sub-floor needs some patching due to marks from carpet strips and a few places where the sub-floor panels don't quite meet evenly anymore. I'm thinking about just sanding off the paint (someone at some point painted the sub-floor) and using a self leveler/patching compound and then putting the VCT down on that. However I've also read that backer board might still be a good idea. If so should I lay the backer board directly on the sub-floor or should i put down a layer of thin set first (which hardiboard, for example, says you should do for porcelain tile but doesn't seem to suggest that for VCT). Guidance would be greatly appreciated.

Thanks!
Melissa

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Old 09-30-2012, 07:34 PM   #2
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VCT on subfloor, need backer board?


You don't use backer board or thinset for VCT. You do need a smooth floor and you use clearset adhesive.

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Old 09-30-2012, 08:50 PM   #3
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VCT on subfloor, need backer board?


Thank you Rusty. That's what I thought but I read conflicting info on putting down thinset, then backer board and then the adhesive - which seemed excessive to me. I'll just get the subfloor smooth and put down my VCT.

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Old 09-30-2012, 09:17 PM   #4
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VCT on subfloor, need backer board?


Make sure that you follow the instructions on the adhesive. It must dry before the tile is installed and you must use the proper trowel.
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Old 09-30-2012, 09:17 PM   #5
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VCT on subfloor, need backer board?


Mellissa,

Quote:
Originally Posted by Mellissa
I'll just get the subfloor smooth and put down my VCT.
NO, that is not the right way to do it. But, it's only a closet and so if the height works out ok and the floor is otherwise firm, go ahead and skip a step. Don't be surprised if the seams telescope through to the tiles and the tiles eventually crack.

Otherwise........ You do not install VCT on a subfloor, you need and underlayment such as 1/4" AC ply or something made for vinyl floors.

So, firm up the subfloor with screws as necessary, then install 1/4" underlayment, then the vinyl tiles.

Jaz
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Old 09-30-2012, 09:21 PM   #6
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VCT on subfloor, need backer board?


In a closet, I would not worry about underlayment. Laying it on a plywood subfloor with patched seams should be fine.
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Old 10-01-2012, 06:32 PM   #7
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VCT on subfloor, need backer board?


Thank you both for your advice! If I do install an underlayment can the subfloor be a little uneven or should it first be smoothed out with a leveler? It's not much of a dip but there is a bit when you check it w/ a straight edge.
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Old 10-01-2012, 06:40 PM   #8
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VCT on subfloor, need backer board?


If you are going to put down an underlayment, might as well even the floor out first.
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Old 10-01-2012, 07:33 PM   #9
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VCT on subfloor, need backer board?


Good point. However someone painted the subfloor. Have you had any issues/experience with leveling compounds having problems not adhering to paint? If so then I'd still need to strip off the paint and I'm trying to find a way around that unless I have to
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Old 10-01-2012, 07:40 PM   #10
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VCT on subfloor, need backer board?


Don't think you'll have a problem as long as the paint is well adhered.

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