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Unread 09-02-2019, 06:13 PM   #16
jasonkelly214
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Thanks. I pulled the spacers and cleaned up the tile. I cleaned out all the grout lines with a toothbrush and after wiping the tiles clean I buffed them lightly with a damp microfiber cloth.

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Unread 09-02-2019, 06:18 PM   #17
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Good move, that.
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Unread 12-05-2019, 02:11 PM   #18
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My installation is going well albeit slowly. Thanks for the help thus far.

I am renting a tile saw this weekend to cut my 6x24 planks, as well as to make some cuts of the river rock for the shower floor. Before that though I read something I need clarification on.

I saw in a thread somewhere about sealing the rock before installing it in the shower floor to prevent the sealer from getting onto the mortar bed and causing bonding issues with the thinset and then grout. Is this true? I plan to do an epoxy grout for the floor as suggested here.

Another question: I had some material cut to use for my curb top. I believe I read to apply thinset to the curb and the material, troweling in the same direction. Any recommendation on trowel size for this?
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Unread 12-05-2019, 04:18 PM   #19
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uh oh....why is there no redgard on the wall opposite the shower head??? I think you messed that up.....
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Unread 12-05-2019, 04:26 PM   #20
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There's plastic behind the cbu on that wall
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Unread 12-06-2019, 09:27 AM   #21
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I still would not have redgaurded 2 walls in a shower and not the third. I know a plastic sheet behind the CBU is acceptable, but it has many penetrations like screws and staples. Also, how did you tie in the bottom of the plastic sheeting to the pan? How thick was the plastic sheeting? Were there ANY tears or seams?
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Unread 12-06-2019, 01:09 PM   #22
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Staples all covered with plastic insulation tape. plastic over the edge of the pan liner and caulked down. I suppose that there are the cbu screws through it.
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Unread 12-06-2019, 01:18 PM   #23
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Jason, a properly installed moisture barrier behind the CBU shower walls is a suitable installation per tile industry standards. My concern would be for the treatment at the vertical corner where you changed from a direct bonded waterproofing membrane to a moisture barrier behind your CBU. How did you treat that area?

And why, pray tell, did you not continue the direct bonded waterproofing all the way around your walls?
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Unread 12-06-2019, 01:37 PM   #24
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CX,

The plastic goes into and past the visible corner since the back wall is furred out 3.5 inches.

The redguard on that right wall extends out 12 inches from the inside corner.

Fiberglass is embedded into the redguard as it goes around the corner.

I did not continue the redgaurd because it was my understanding that walls with plastic behind the CBU should not also have waterproofing membrane on top of them so as not to sandwich the moisture.
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Unread 12-06-2019, 02:03 PM   #25
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That would be a correct understanding, jason, but I would have recommended defeating the poly barrier and continuing the waterproofing membrane.

Your local code may/may not require a vapor barrier material on the inside of exterior walls, but the direct bonded waterproofing membrane would satisfy that requirement.

That's one reason we like folks to put a geographic location in their User Profile. Helps in evaluating such situations and making timely recommendations.

My opinion; worth price charged.
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Unread 12-06-2019, 02:18 PM   #26
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Hi CX. I will update my location. I am in Oregon. When I tore out the drywall it had plastic behind it so I simply put the plastic back assuming (perhaps wrongly) that must be code for my area.
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Unread 12-06-2019, 02:27 PM   #27
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I appreciate the help with the membrane and waterproofing. But I do also still have the above questions if someone could help with those as well:

https://www.johnbridge.com/vbulletin...8&postcount=18
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Unread 12-06-2019, 04:19 PM   #28
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You might wanna speak with the grout manufacturer about that, Jason. I've personally never heard of sealing that type of stone before installation, but I'm also not a frequent user of epoxy grout. I'd really want to know if the grout manufacturer thought it was a problem before I made a decision on either my sealer or my grout.

What is this "material" for your curb top of which you speak?
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Unread 12-06-2019, 04:28 PM   #29
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Ok I wasn’t sure because I believe the stone manufacturer said to seal before using epoxy grout. I will see what the grout manufacturer thinks.

I’m not sure if it’s exact composition. An engineered stone I believe. Marble look. I don’t believe it’s real marble.
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