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Old 02-07-2012, 01:47 PM   #16
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Increase height of subflooring


the sheathing is fine. it sounds like your just needing the height, as long as you stick to plywood (not any kind of particle board) you can use anything thats available. Your scenario really calls for the cheapest thing you can buy.... AS LONG AS ITS PLYWOOD (that was my outside voice the need for sanded or guaranteed filled knots doesn't matter for your application.

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Old 02-07-2012, 01:54 PM   #17
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Do I have to go to somewhere other than HD or Lowes?
Not at all, HD should have at least one choice and Lowes has at least two. You can also shop at a real lumber yard where you'll have a better chance of speaking with someone who knows lumber.

You need underlayment grade, with exterior glued plies. The easiest to find is B/C grade. So, BCX & ACX should be the right ones rated for underlayment. Birch underlayment would be very good, but unnecessary in your case.

Lowes shows;http://www.lowes.com/pd_12227-99899-...7C1&facetInfo=
*AND http://www.lowes.com/pd_7707-99899-1...7C1&facetInfo=

It would also be helpful if people would show their location for more accurate answers concerning products and also methods. We promise not to show up at your door.

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Old 02-07-2012, 02:14 PM   #18
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Increase height of subflooring


if i was doing it i would use the 3-ply sheathing you already picked up
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Old 02-07-2012, 02:43 PM   #19
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if i was doing it i would use the 3-ply sheathing you already picked up
Harry, maybe you're not getting the idea of these forums or why manufacturers and associations have specifications regarding proper products and methods. Sheathing for underlayments is not the correct product to use. Can it work though? Yes it will most of the time especially if installing nail-down hardwood. But it is still a poor grade for the job. We are here to give "correct" advice, not just answer with what has worked for us on several occasions, or even many times.

Products and methods have been tested and that is why we have specifications. There are enough things that could go wrong even when all specs are followed, we as "pros" should not encourage people to cut more corners to save $50. In the end some people cut corners anyway, sometimes not even realizing it. As professionals we should not promote "hack" work.

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Old 02-07-2012, 03:21 PM   #20
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Increase height of subflooring


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Originally Posted by thiggins18 View Post
What do you mean by standard plywood?

I've called around to building suppliers and my options are.

CDX yellow pine (sheathing), BCX plywood, ACX plywood, CDX Fire retardent, baltic birch (expensive), and sandply (also expensive).

I guess BCX is certified for use as underlayment.
CDX is inexpensive because its a lower grade. Any plywood starting with a C will be lower quality. Meaning, It has a lot more voids, knots, etc. I personally would never use lower grade for sub-flooring.

Last edited by jasin; 02-07-2012 at 03:27 PM.
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Old 02-07-2012, 03:28 PM   #21
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Increase height of subflooring


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Harry, maybe you're not getting the idea of these forums or why manufacturers and associations have specifications regarding proper products and methods. Sheathing for underlayments is not the correct product to use. Can it work though? Yes it will most of the time especially if installing nail-down hardwood. But it is still a poor grade for the job. We are here to give "correct" advice, not just answer with what has worked for us on several occasions, or even many times.

Products and methods have been tested and that is why we have specifications. There are enough things that could go wrong even when all specs are followed, we as "pros" should not encourage people to cut more corners to save $50. In the end some people cut corners anyway, sometimes not even realizing it. As professionals we should not promote "hack" work.

Jaz
This is very good advice!

Last edited by jasin; 02-07-2012 at 03:39 PM.
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Old 02-07-2012, 05:10 PM   #22
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Increase height of subflooring


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It would also be helpful if people would show their location for more accurate answers concerning products and also methods. We promise not to show up at your door.
Haha considering I pratically I live right next to you (Orchard Lake). I wanted to keep my address secret

Thanks for your help I'll go pick up some BCX on my way home. So I can get this thing underway!
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Old 02-07-2012, 09:27 PM   #23
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Increase height of subflooring


Higgins,

I'm not picking on you or anyone else who posts here. It's a fact that most people wouldn't think to mention (location) when asking their questions. But it really matters if you're located in northern Canada or Houston even for interior projects. This site should make the point of suggesting you enter your location when you sign up.

Aha, Orchard Lake, a very nice place to live. Good luck with the project.

BTW, that marble on the bath floor.....is that over a "mud" base or double ply with a concrete board? How long have you been walking on it. Has it worked out well?

Jaz
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Old 02-08-2012, 07:06 AM   #24
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Increase height of subflooring


I have a feeling neither jazman.
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Old 02-08-2012, 07:55 AM   #25
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Increase height of subflooring


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Originally Posted by JazMan View Post
Higgins,
Quote:
Originally Posted by JazMan View Post

I'm not picking on you or anyone else who posts here. It's a fact that most people wouldn't think to mention (location) when asking their questions. But it really matters if you're located in northern Canada or Houston even for interior projects. This site should make the point of suggesting you enter your location when you sign up.

Aha, Orchard Lake, a very nice place to live. Good luck with the project.

BTW, that marble on the bath floor.....is that over a "mud" base or double ply with a concrete board? How long have you been walking on it. Has it worked out well?

Jaz


Jaz I didn't think you were picking on me or anything, I just wanted to do the job right. I appreciate your helpful insight. The flooring I'm installing will also have an inlayed border so I want to make sure everything is perfect so the final product turns out well.

It’s hard to see the underlayment of the tile flooring because of the metal band (hallyway) and the cap (bathroom). There is a base of mud that’s pretty thick I’m guessing 5/8"+ I don't think they can lay mud that thick so I would assume there is hardibacker. From what I can see under the tile is goes like this...

3/4" OSB
Felt Paper
Hardibacker ?
Mesh
Tile (3/4")

Last edited by thiggins18; 02-08-2012 at 07:57 AM. Reason: Spelling
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Old 02-08-2012, 08:53 AM   #26
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Increase height of subflooring


The National Tile Contractors Association recommends that OSB NOT be used as subfloor.
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Old 02-08-2012, 09:00 AM   #27
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Increase height of subflooring


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Originally Posted by thiggins18 View Post

Jaz I didn't think you were picking on me or anything, I just wanted to do the job right. I appreciate your helpful insight. The flooring I'm installing will also have an inlayed border so I want to make sure everything is perfect so the final product turns out well.

Itís hard to see the underlayment of the tile flooring because of the metal band (hallyway) and the cap (bathroom). There is a base of mud thatís pretty thick Iím guessing 5/8"+ I don't think they can lay mud that thick so I would assume there is hardibacker. From what I can see under the tile is goes like this...

3/4" OSB
Felt Paper
Hardibacker ?
Mesh
Tile (3/4")
Sounds like a Jersey Mud set---not good---
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Old 02-08-2012, 09:27 AM   #28
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Increase height of subflooring


@ Thinggins18, can you upload a photo of what you are seeing? That might help us better.
Thanks

Sent from my iPhone 4 ios5
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Old 02-08-2012, 09:57 AM   #29
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Sounds like a Jersey Mud set---not good---
After the bedroom and the hallway is done I will be putting some woodfloor in a halfbath off the great room. For some reason the marble wasn't laid in the bathroom and its 12x12 builder grade tile. I should be able to figure out whats under the tile then... The marble has been installed for 7 years now. It still looks very good...

Actually one more question while I have the ear of the professionals. Is there anyway to polish onyx tiles? We have them in another room and they look somewhat hazy.
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Old 02-08-2012, 09:58 AM   #30
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Increase height of subflooring


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Originally Posted by JetSwet View Post
@ Thinggins18, can you upload a photo of what you are seeing? That might help us better.
Thanks

Sent from my iPhone 4 ios5
Yeah Ill snap a pic when I get back home.

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