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Old 09-08-2011, 02:51 PM   #1
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i just finished laying 1x6s over the floorjoists(replacing what was original to the house), which way should i go next to prep for the tiling? 1/2" plywood and 1/2" concrete board? or 3/4" plywood and 1/4" concrete board?

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Old 09-08-2011, 03:50 PM   #2
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Either way would work but I would personally go with the 1/2" plywood and 1/2" cement board. It will give a slightly more stable surface for the tile.

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Old 09-08-2011, 04:11 PM   #3
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The 1/2" plywood is only marginally acceptable and none of the cement boards no matter their thickness offers any additional structural stability what-so-ever.

My suggestion would be 3/4" plywood and either cement board would have the same effect. The plywood should be exterior grade/underlayment grade, Exposure 1 plywood.

The cement board also requires a bed of fresh thinset mortar at time of installation along with the use of the proper screws.
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Old 09-08-2011, 04:24 PM   #4
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The 1/2" plywood is only marginally acceptable and none of the cement boards no matter their thickness offers any additional structural stability what-so-ever.
1x6's with 1/2" plywood is a perfectly acceptable subfloor.
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Old 09-08-2011, 04:37 PM   #5
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Quote:
Originally Posted by Msradell View Post
Either way would work but I would personally go with the 1/2" plywood and 1/2" cement board. It will give a slightly more stable surface for the tile.
Cement board adds no structural strength at all.
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Old 09-08-2011, 05:21 PM   #6
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1x6's with 1/2" plywood is a perfectly acceptable subfloor.
Okay if you say so.

But when those fresh 1x's begin to crown and cup and curl and distort and they stress that 1/2" plywood and wreck the tile installation don't come crying to me about your error.

If they were seasoned 1x's it would be a different story maybe.

Are the new 1x's tongue and groove?
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Old 09-08-2011, 06:05 PM   #7
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Are the new 1x's tongue and groove?
If they aren't the OP certainly needs to find somebody that knows what they're doing to finish the project!
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Old 09-11-2011, 08:35 AM   #8
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any good or bad about the advantech plywood for floors? or should i stay with traditional underlayment plywood?
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Old 09-11-2011, 10:01 AM   #9
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Just to ensure your success, what are the joist dimensions and span? Too much bounce and your tiles will crack and/or come loose.
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Old 09-11-2011, 08:43 PM   #10
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any good or bad about the advantech plywood for floors?
Just so there's no misunderstanding, AdvanTech is not plywood, it's a high quality OSB subfloor.

Quote:
Either way would work but I would personally go with the 1/2" plywood and 1/2" cement board. It will give a slightly more stable surface for the tile.
I disagree with that.

As far as whether to go 1/2" ply and 1/2" concrete backer, or 3/4" ply and 1/4" backer. There is no point of using 1/2" concrete backer on floors. As stated concrete backer adds little strength. Add the thickest plywood you can instead.

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Old 09-12-2011, 04:12 PM   #11
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my floor joists are on 16" on center joists.

on top of that i have 1x6s screwed into place.

floor will be about 315sq. ft.


Jaz, would you recommend going with the advantech? The guys at the local(hometown building supply store. 60 years in business here), took time and broke it all down for me and really made it out to be some good stuff.

agree? disagree?

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Old 09-12-2011, 05:54 PM   #12
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Jaz while you are at it see if you can drag an answer out of jwinters03 about whether or not the 1X6's are tongue and groove.
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Old 09-12-2011, 06:07 PM   #13
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No they are not. Regular pressure treated 1x6s. the original floor that i fell through had normal 1x6s. thats what i replaced with. the original floor was 54 years old.

why the big deal over that?

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Old 09-12-2011, 06:14 PM   #14
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No they are not. Regular pressure treated 1x6s. the original floor that i fell through had normal 1x6s. thats what i replaced with. Why the big deal over that?
"Why the big deal over that?"

Because:
1. That type of subfloor must be tongue and groove.
2. Treated lumber is NEVER used in a ceramic tile installation. NEVER!

Not a big deal for me it won't be my mess in a few months. Big deal for you when the treated lumber begins to dry out and shrink and cup and curl and lifts and cracks the tile and grout.

Take it Jaz!
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Old 09-12-2011, 06:25 PM   #15
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Quote:
Originally Posted by Bud Cline View Post
"Why the big deal over that?"

Because:
1. That type of subfloor must be tongue and groove.
2. Treated lumber is NEVER used in a ceramic tile installation. NEVER!

Not a big deal for me it won't be my mess in a few months. Big deal for you when the treated lumber begins to dry out and shrink and cup and curl and lifts and cracks the tile and grout.

Take it Jaz!
The floor has been down for 2 months. it is dried thanks to this wonderful GA heat.

the plywood i was going to be putting down is T and G. both(advantech and reg) are sold at local place mentioned above.


what about porcelain tile? Laminate? We want to tile, but nothing is set in stone as of yet. i am doing my research. If you want to help me, im listening. My ears are open.

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