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Old 05-22-2012, 08:01 AM   #1
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Luan Plywood Underlayment


I have seen many times here that 1/4" Luan plywood isn't good for underlayment. Some of the men where we go to church are redoing the floor in the kitchen of the preacher's house, it has stick down tile on 1/4' plywood, over old flooring, over particle board, then plywood decking for the subfloor. When I was building I would leave the flooring to the flooring pros so I really don't know which way to go here. The men want to remove the stick down, the 1/4 inch plywood then put 1/4 luan plywood back down then tile or sheet vinyl.

I suggested they use a 1/4 inch sanded plywood instead of Luan, is this correct?

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Old 05-22-2012, 12:02 PM   #2
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Luan Plywood Underlayment


luan used to be what everyone used under sheet vinyl or 12" selfstick. luan or particleboard has no place under ceramic tile. if they decide on ceramic tile then the particleboard should be removed and replaced with 5/8 or 3/4 plywood, then 1/4 cementboard over that applied following manufacturers guidlines.

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Old 05-22-2012, 01:09 PM   #3
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Luan Plywood Underlayment


I prefer the 2/8" sanded plywood myself.

No luan please.
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Old 05-22-2012, 04:04 PM   #4
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Luan Plywood Underlayment


Luan has voids in the plys and can collapse. Use only underlayment grade plywood for vinyl or vinyl tile.
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Old 05-22-2012, 04:37 PM   #5
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Luan Plywood Underlayment


Quote:
Originally Posted by framer52 View Post
I prefer the 2/8" sanded plywood myself.

No luan please.
2/8" instead of 1/4" ?
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Old 05-22-2012, 08:13 PM   #6
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Luan Plywood Underlayment


Quote:
Originally Posted by Seattle2k

2/8" instead of 1/4" ?
Maybe meant 3/8"?

Luan was big back in the day people still use the stuff now.

Last edited by JetSwet; 05-22-2012 at 08:17 PM.
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Old 05-22-2012, 09:05 PM   #7
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Luan Plywood Underlayment


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Originally Posted by JetSwet View Post
Maybe meant 3/8"?

Luan was big back in the day people still use the stuff now.
It's even poorer quality now than it was 20 years ago. They started using luan because so many people screwed up masonite. Masonite was made to be used rough side up and many people installed it smooth side up. Adhesive wouldn't stick to the smooth side.
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Old 05-22-2012, 09:18 PM   #8
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Luan Plywood Underlayment


Luan can also cause staining and glue reliece.
Ever seen a light colored vinyl floor that always looks dirty?
If you have to prove it to some old timers at the church go on the web site of the company that made the flooring before they lay it.
Also make sure they attach it every 4" on the edges, and 6 to 8" in the field.
I use a narrow crown pneumatic staple gun set in automatic to lay it. You can do a whole sheet in less then 2 min. and not have to go back and fill every nail hole. You still have to fill all the seams.
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Old 05-22-2012, 09:31 PM   #9
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Luan Plywood Underlayment


Thanks fellows, I really do appreciate your help. I just had another thought since this floor has particle board over plywood, will the 1 1/4 inch narrow crown staples hold or will I need a longer staple to go further into the plywood subfloor?
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Old 05-22-2012, 10:10 PM   #10
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Luan Plywood Underlayment


Well the fact that you can cut it with a razor blade knife is good enough for me not to use it.
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Old 03-05-2013, 04:21 PM   #11
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Luan Plywood Underlayment


I'm installing flooting hardwood in my house.The sub floor has a little give in them is this something that will mess up my new floors.
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Old 03-05-2013, 04:31 PM   #12
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Luan Plywood Underlayment


Define 'a little'----you may be just fine---but we need a little more info---what is the subfloor made of and how much does it flex?

Could you start a new thread in 'flooring'? many members won't read through an old thread like this one----go to 'flooring' click on 'new thread'---Mike------
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Old 03-05-2013, 04:41 PM   #13
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Luan Plywood Underlayment


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Originally Posted by Pantherfan190 View Post
I'm installing flooting hardwood in my house.The sub floor has a little give in them is this something that will mess up my new floors.
Its better to start new thread.

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