Ply On Slab ....yeah I Know - Flooring - Contractor Talk

Ply On Slab ....yeah I Know

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Old 02-05-2013, 07:31 PM   #1
InterCounty's Avatar
Trade: Hardwood Flooring Contractor
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Ply On Slab ....yeah I Know

I know a lot of guys dont like the idea of ply affixed to slab but I have a HO that wants a hw floor level to his kitchen.

The kitchen floor is about 1 1/8" higher then the slab.
He wants to put 3/4 ply down with glued engi to the ply.

Sleepers are out bc of height to high.
Glued engi is out bc of height to low.
Floating engi is out bc HO hates the idea.

Years ago I did several ply on slab and nailed solid 2 1/4" down.

I troweled the entire slab with Karnak #79AF wood block mastic, dropped on the ply and ram set them every 12" bc Hammer bolts seem way to slow. (NO call backs!)

Now I usually sell a floating or engi slab glued with Bona R851, but HO wants height to be right.

I read about double floating 1/2" ply but am skeptical about movement (bounce) and I doubt HO would go for it.
Plus, it would throw off the height.

Should I use Bostiks Best, Titebond 811 or another urethane adheasive or is that overkill/overprice for ply?

Wondering what other guys do, or would do, here?
"Of course to want it done today....... if you wanted it done tomorrow, you'd wait until then to call me"

Last edited by InterCounty; 02-05-2013 at 07:34 PM.
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Old 02-05-2013, 10:34 PM   #2
jamestrd's Avatar
Trade: wood flooring
Join Date: Oct 2008
Location: New Jersey
Posts: 1,706
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Re: Ply On Slab ....yeah I Know

Do what you know I do.

i have yet to EVER have problem with an affixed ply to slab..

it is till in the NWFA specs and has not been removed.

those are the guidelines that set OUR industry..
anybody else's logic/and or rocket science don't matter.

they don't represent us in court..but our proven practices and approached governed by our Worldwide organisation does.


Karnak...thought i was the only one still using it...

their home is here in NJ...


James Hernandez
All Flortec Inc.
West Milford,NJ
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