Tiles laid directly to 3/4" subfloor?


Old 03-22-05, 10:17 AM
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Tiles laid directly to 3/4" subfloor?

hi all--

i'm new to the tile section, but have found literally 100's of helpful answers to the rest of my reno' project in the other forums.

i am now at the point where i am ready to floor my 5 x 9 bathroom (approximately 6' of floor)

the floor is 3/4" ply subfloor glued and screwed (every 4"), which is over tji 360's at 16" oc (with one extra in between the two middle joists for added support).

i'm wondering if i can install the tile directly to the subfloor or is that not advised?


what is the best tile size to use?

my old apartment had what i think was like 2" tile flooring....

any advice would be greatly appreciated.

thank you,
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Old 03-22-05, 04:31 PM
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Hardibacker makes the claim you can put their cement board over 3/4" ply. I would do that at the very least. Setting on ply is risky business, you will get a much better bond to the cement board. You can go with small mosaic up to 12" porcelain.
Old 03-22-05, 07:32 PM
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Like TGB says, you need to strengthen your floor.

As far as tile size, pick what you like
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Last edited by Daniel Wachtel; 03-22-05 at 07:43 PM.
Old 03-23-05, 05:43 AM
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If you go with a larger tile size like 12" it will make your bathroom floor space look bigger.
Old 03-23-05, 06:19 AM
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Thanks for the 411 guys!
Hardibacker it is!


I really appreciate it!

thanks again....
am going to pick some up this weekend!!

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