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Unread 03-02-2020, 12:13 PM   #1
btv268
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Beginner shower tiling question

Greetings,
I thought I had everything figured out before I started my project but I guess I have watched too many YouTube video and now I’m confused.

I started replacing a shower surround in a small bathroom. After the rip out, I installed cement board on the shower walls except for the top 18 inches which is preexisting drywall that meets the ceiling. My goal was to tile from the shower base to the ceiling.

My first question is can I tile over this preexisting drywall with proper prep?
Second would this last top 18 inch be considered part of the wet area and does it need to be waterproofed?

And my last question of this post is, if I can tile over the drywall, I noticed a that there is a slight bowing on one area of drywall while the cement board is flat. What is the best way to correct this?

Any help would be appreciated.

Thanks
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Unread 03-02-2020, 12:24 PM   #2
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BTV,

Welcome to the forum. Can you give us a first name to use? Doesn't need to be your real name, but it comes in handy.

1- Yes
2- Depends. In my fair state of Texas the plumbing code requires waterproofing to no less than 6 feet above the height of the shower floor. Now if you're working over a tub, that's 6 feet above the floor of the tub itself. If you're in a shower its the shower floor. Not the main floor of the bathroom.

Waterproofing to 6 feet is the minimum you can do. Waterproofing everywhere there is tile is usually a good idea when it comes to cleaning, crack isolation, and movement joints.
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Unread 03-02-2020, 01:57 PM   #3
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As far as the bow in the drywall...
It would be a good idea to go ahead and address that issue now. A bow in the wall will cause issues as you tile that area.
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Unread 03-02-2020, 02:53 PM   #4
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Wink

at the height your talking yes, you could go over the drywall but it is not recommended in a wet area. Why not just go with 18 more inches of tile backer board and waterproof it,it might add $25..?
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