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Old 10-07-2018, 06:34 PM   #31
Jsmallberries
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Hollow sounding Shower floor tiles

Have been working on my cheap shower upgrade. A 4' x 4' tiled stall shower built in 2000. Replaced the shower trim kit,and cartridge, replaced the marble sills, took apart the shower frame, cleaned and painted the previously shiny chrome frame, and replaced the glazing. Came out pretty good overall

There is a section of the shower floor that has de-bonded, hollow sounding. Is there a fix for this, inject epoxy? See pic. Next step is a complete rebuild, just can't do it now
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Old 10-07-2018, 06:52 PM   #32
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Hi John, no epoxy injection for that. It might be possible to lift those tiles, clean them up and stick them back down with thinset, then regrout them. You will have to be careful, sometimes other tiles will come loose.
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Old 10-07-2018, 10:37 PM   #33
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If you've got a PVC liner underneath, with a mud bed above that then the tiles, it's easy enough to reset the loose tiles.

If you have a surface-applied membrane of some sort, you'd have to be very careful not to puncture the waterproofing layer.
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Old 10-08-2018, 04:05 PM   #34
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Liner yes, recessed slab on grade install, So I can break out loose area, reset with thinset , regrout should be okay?
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Old 10-08-2018, 05:10 PM   #35
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Yes, as long as the tiles are coming loose from the mud bed. If the mud is coming up with the tiles then the mud will need to be patched in first. Take it slow and easy, it's a good way to open a can of worms.
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Old 10-08-2018, 07:30 PM   #36
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Loose/hollow tiles is caused by one of two things:
- poor initial install with poor coverage
- movement that broke the bonds caused by numerous different things

You really want to determine the cause, as the fix is likely different.
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Old 10-08-2018, 08:28 PM   #37
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I'm thinking, since it is a recessed slab, with a liner, we want to believe there is no leak, and no water getting anywhere bad. I guess we don't know that there is a preslope, but if there wasn't the smell would probably be bad by now. So, if the only issue is that they sound hollow, with no movement or cracking grout, I might be inclined to leave well enough alone. I could see the cure being worse than the disease.
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Old 10-08-2018, 09:59 PM   #38
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Very few of the showers we tear out have preslopes. And I can count on one hand the ones that had a mold problem. As long as the weepholes are open and the water gets replaced, it's not going to smell. There's other factors too, like the type of mud used for the mudbed, things like that.

Many times when removing loose tiles, the neighboring tiles seem fine but are actually barely bonded. It doesn't take much to break them loose. Before you know it you have half the floor up.
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Old 10-08-2018, 11:19 PM   #39
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Does the shower have a curb? From the picture, if there is one, it's not much. Per code, there should be a 2" drop from the top of the curb or entrance to the top of the drain. WIthout a curb, using a liner, it's hard to make that curb junction waterproof. Much easier with a membrane.
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Old 10-09-2018, 08:20 AM   #40
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The slab is recessed in the shower area.
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