as pic, what is the white stain? How to.remove it?
when i touch, i feel the surface is rough.
what is this stain?
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 Nov 30 2025, 03:18 PM, updated 3d ago
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#1
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Junior Member
318 posts Joined: Jan 2022 
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as pic, what is the white stain? How to.remove it? when i touch, i feel the surface is rough. |
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Nov 30 2025, 03:24 PM
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#2
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Junior Member
30 posts Joined: Jul 2009
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calcium deposit from hard water or maybe excess tile grout compound mix
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Nov 30 2025, 03:40 PM
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#3
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Senior Member
1,300 posts Joined: Oct 2005 
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why is the bathroom so dirty?
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Nov 30 2025, 03:57 PM
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#4
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Senior Member
9,043 posts Joined: Jan 2003
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Pour acid.
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Nov 30 2025, 07:39 PM
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#5
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Junior Member
986 posts Joined: Mar 2019
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Redo the tile la...
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Nov 30 2025, 08:29 PM
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#6
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Senior Member
3,576 posts Joined: Apr 2006
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Looks more like accumulated soap scum over the years...
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Dec 2 2025, 11:35 AM
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#7
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All Stars
48,441 posts Joined: Sep 2014 From: REality
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Seems like some kind of excess tiles grout mixture...
Contractor really did such bad job... 🤔 |
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Dec 2 2025, 12:58 PM
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#8
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Junior Member
986 posts Joined: Mar 2019
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Contractor lanjibai never do water proofing properly..
So the acidic water start to makan the cement concrete below and then melt and deform.. it will be like stalagmite cave like stuff This post has been edited by Boomwick: Dec 2 2025, 01:00 PM |
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Dec 2 2025, 06:35 PM
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#9
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Junior Member
318 posts Joined: Jan 2022
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QUOTE(Boomwick @ Dec 2 2025, 12:58 PM) Contractor lanjibai never do water proofing properly.. its a condo unit. will the water leak through downstair ?So the acidic water start to makan the cement concrete below and then melt and deform.. it will be like stalagmite cave like stuff  any solution? thanks This post has been edited by teacherharvard: Dec 2 2025, 06:35 PM |
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Dec 2 2025, 06:53 PM
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#10
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Junior Member
986 posts Joined: Mar 2019
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QUOTE(teacherharvard @ Dec 2 2025, 06:35 PM) its a condo unit. will the water leak through downstair ? Leak or not i dunno. Very hard to tell.any solution? thanks Solution is redo tile only,, and do the surfacing for water escape properly so no water ponding.. and do water proofing properly 2 layer for safety. If u wanna hack and redo tile, i recommend the side also hack 2 tile up so the corner can waterproof properly also. |
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