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Old 03-29-2014, 05:03 PM   #1
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Subfloor and vinyl plank


We have vinyl plank we are going to put down but have an issue with our subfloors. It looks like the people who owned the house previously put down something like particle board because it is crumbling in places where even the smallest amount of moisture has touched. We are planning on placing 3/8" plywood over the existing subfloor to give ourselves that smoother surface we need. Are there other options that we are overlooking that are better or less expensive? Where we live is pretty rural and plywood can get pricey.

I included a picture of our current subfloor.
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Subfloor and vinyl plank-imag0498.jpg  
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Old 03-29-2014, 07:25 PM   #2
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Your only choice is 1/4" underlayment grade AC plywood. All vinyl flooring require an "A" face and zero voids. I don't think even 3/8 AC will have zero voids, you must use an underlayment grade.
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Old 03-29-2014, 07:39 PM   #3
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wingnut is talking about luan board, I think its actually 3/16" its around $10 a sheet around me.
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Old 03-29-2014, 07:59 PM   #4
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Quote:
Originally Posted by JustinK View Post
wingnut is talking about luan board, I think its actually 3/16" its around $10 a sheet around me.
No I'm not. I'm talking about exactly what I wrote, and decidedly not luan

http://www.rosboro.com/pdfs/R340G.pdf

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Old 03-30-2014, 08:22 AM   #5
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Luan is no longer an expectable subfloor due to voids, color bleed through, and can cause glues to release.
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Old 03-30-2014, 09:14 AM   #6
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Maybe there is lesser quality luan out there but i haven't come across it. It would have to be combined with a very cheap vinyl for color to bleed through. Armstrong didnt say you couldnt use luan but it pointed out bleeding issues.
Vinyl plank is thicker than normal vinyl tiles and doesn't stick to underlayment.
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Old 03-30-2014, 09:30 AM   #7
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http://www.armstrong.com/content2/fl...iles/60064.pdf
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Old 03-30-2014, 10:07 AM   #8
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That what I was looking and it said some luan has that problem But there is still an X showing you can use it with any of there products. Which is why I said there maybe lesser quality luan but I never had those issues or know anyone who has.
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Old 03-30-2014, 11:58 AM   #9
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Quote:
Originally Posted by JustinK View Post
That what I was looking and it said some luan has that problem But there is still an X showing you can use it with any of there products. Which is why I said there maybe lesser quality luan but I never had those issues or know anyone who has.
I have been in the business for 40 years. Years ago, luan was OK. I have seen all the problems. Plies collapsing, bleed through, delamination. It's not worth using the luan made today. If you have a problem, they will find a way not to honor the warranty if you use luan.
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Old 03-30-2014, 12:02 PM   #10
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There just isn't that many square feet in a kitchen or bathroom. At a price difference at about $17.00/sheet, you're not going to save much using anything other than AC underlayment.
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Old 03-30-2014, 12:03 PM   #11
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From Armstrong.

"3)
Lauan Plywood, when used as an underlayment, should be Type 1

(Exterior). The best grade is BB and the next best is CC, while OVL
(overlay grade) is the minimum acceptable face grade. There is a
wide variety of quality and species classed as lauan. Some may
present severe problems such as discoloration, indentation, loss of
bond and delamination when used as an underlayment"
And in another place, it says all underlayment must be APA rated. I don't think you will find any luan that is APA rated.
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