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Old 06-12-2012, 05:51 AM   #1 (permalink)
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OSB under laminate flooring?

Title basically sums up the question.

My wife decided she wanted all new flooring on our main floor. I'm doing tile in the kitchens and bathrooms, laminate in the living room. Upon tearing up the kitchen to put down backer board, I discovered the living room needs to come up at least 1/4". Can I use OSB for this? I'm not trying to cheap out at this point, but is there a significant benefit to using plywood, especially since there is already OSB there?

I am also putting down the vapor barrier/foam pad stuff under the laminate.
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Old 06-12-2012, 06:14 AM   #2 (permalink)
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Quote:
Originally Posted by ndsgr View Post
Title basically sums up the question.

My wife decided she wanted all new flooring on our main floor. I'm doing tile in the kitchens and bathrooms, laminate in the living room. Upon tearing up the kitchen to put down backer board, I discovered the living room needs to come up at least 1/4". Can I use OSB for this? I'm not trying to cheap out at this point, but is there a significant benefit to using plywood, especially since there is already OSB there?

I am also putting down the vapor barrier/foam pad stuff under the laminate.
do it right and put down 1/4" hardwood plywood underlayment
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Old 06-12-2012, 06:21 AM   #3 (permalink)
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do it right and put down 1/4" hardwood plywood underlayment
this
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Old 06-12-2012, 06:27 AM   #4 (permalink)
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Don't forget to plane the seams of the OSB that is already down too!
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Old 06-12-2012, 06:31 AM   #5 (permalink)
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Don't forget to plane the seams of the OSB that is already down too!
I use a belt sander to keep from just ripping it apart. Otherwise, you need an EXTREMELY sharp plane.
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Old 06-12-2012, 06:33 AM   #6 (permalink)
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Will do. Is $20 for a 1/4x4x8 sheet sound about right?

EDIT: What do I use to secure it? Screws and an adhesive?

Last edited by ndsgr; 06-12-2012 at 06:34 AM.
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Old 06-12-2012, 06:47 AM   #7 (permalink)
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Crown staples, lots of em.
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Old 06-12-2012, 06:59 AM   #8 (permalink)
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Will do. Is $20 for a 1/4x4x8 sheet sound about right?

EDIT: What do I use to secure it? Screws and an adhesive?
Yeah, it's not cheap.

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Crown staples, lots of em.
Or ring shank nails.
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Old 06-12-2012, 07:03 AM   #9 (permalink)
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For laminate glue and screws would work fine if thats easier for you, but the staples are best, staple with the grain so it doesnlt pop out chunks, and staple every 6" around the edges and then a row every 1' spacing about 6-8".
Thats what we do when preping fo tile, so for a floating floor should be mint, also you should lay your sheets perpendicular to the origanal floor sheeting
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Old 06-12-2012, 07:06 AM   #10 (permalink)
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Thanks for the help guys!

Kind of a different topic, but regarding tile: I jacked up a bit, I think. I pushed a little too hard on one room's tiles. They all seem secure, but what can I expect in the future? Just some cracked ones or loose ones? For the rest of the rooms, I'll use the rubber mallet and piece of wood trick.
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Old 06-12-2012, 07:13 AM   #11 (permalink)
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Luan is an acceptable underlay product for floating floors, That said Luan should not be $20 a sheet. $10-15 a sheet at my local Menards. Fawk Home Depot, Menards beats them every time.... If you really want to get serious look into some 5ply 1/4" birch.
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Old 06-12-2012, 07:13 AM   #12 (permalink)
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Ive got a question about your first post, why does the living room need to come up in the first place? Lower than the tile? Reason im asking is the lamanite should be lower than the tile
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Old 06-12-2012, 07:26 AM   #13 (permalink)
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Not necessarily lower than the tile, but within 3/16's or you will have problems with the transitions.
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Old 06-12-2012, 07:37 AM   #14 (permalink)
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The living room is currently white carpet. We have two kids and cat. It doesn't stay white. If anyone has any ideas aside from raising it, I'm all ears!

Here is the transistion to the kitchen (put in the backer board on left and a tile sample or right as well as some of the old laminate for measurements):


Here is the transition to some existing hardwood at the entry way (note carpet foam is blocking part of the ruler).


Here is the fireplace tile (in living room):

Last edited by ndsgr; 06-12-2012 at 07:41 AM.
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Old 06-12-2012, 07:47 AM   #15 (permalink)
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Ic what your saying, normaly what we do in our houses is use 1/2 plywood subfloor for the tile and for the transition we use shcluder (sp) transition , so the tiles a half inch higher than our laminate and the laminate slides right under our shcluder (sp?) We obviously tile then do hardwood or laminate
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Old 06-12-2012, 08:02 AM   #16 (permalink)
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If your using a T-cap transition piece between the tile and laminate transitions, the closer to level you are the better. But, within 3/16 on either side will work - I have to deal with this a couple of times a month (flooring guy) and the customer is usually happy with this.
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Old 06-12-2012, 08:04 AM   #17 (permalink)
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Id look into some differnt transitions you might find a step down that matches you laminate too , your still going to have to put on in might be able to save a step
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Old 06-12-2012, 08:48 AM   #18 (permalink)
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There will be a T-mould transition that will work for any height/flooring difference. Ya just gotta find it, and sometimes get a little crafty with the table saw.
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