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Unread 08-06-2019, 06:15 AM   #1
piggyr00
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White staining on slate tile

Hello!

I was referred over to this forum from Reddit, so I hope I came to the right place.

We rented out our home for several years while living overseas. When the tenants moved out, we noticed that our slate floors were stained with rust and a white discoloration in two areas in the outline and imprint of a carpet. I don't have close-up photos, but you can see lines that look like carpet imprint or maybe whatever was used to keep the carpet down as part of the white stain.

We had a professional floor cleaner come in to try and remove the stains. He spent four hours, removed the sealant, and cleaned two of the the rooms. Once dried, most of the rust came out, but the white carpet imprints/lines of a carpet remain.

I was asked in the reddit forum how the tiles were installed. They were installed while we were living overseas between tenants. We used a professional contractor so I can only assume they were installed correctly.

At any rate, what I'm trying to determine is if there is anything further we can do to remove the stains short of replacing the tile. Would someone that specializes in slate restoration be able to do anything? Is this different than what a prof. floor cleaner would do/what we already had done?

Thanks for your help.
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Unread 08-06-2019, 10:05 AM   #2
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Hi Piggy,

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Unread 08-07-2019, 07:22 PM   #3
piggyr00
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Thank you. Any help that you can provide would be greatly appreciated.
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Unread 08-07-2019, 10:52 PM   #4
Tool Guy - Kg
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Welcome to the forum, Vero!

Okay, it seems like pic #1 is an “after” pic. And pic #3 is definitely a “before” pic. What about pic #2?

If the first picture is the “after”, the difference in sheen tells me that there is some sort of coating still there. Please confirm.

Yes, there is a significant difference between a competent floor cleaning company and a competent stone restoration specialist.

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Unread 08-08-2019, 11:14 AM   #5
piggyr00
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These are all different photos of before cleaning - they occur in diff places in our home. After the cleaning, it looked much the same except for the photo with the rust - most of the rust was removed, but not all.
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Unread 08-08-2019, 11:14 AM   #6
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Thanks for the reply!
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Unread 08-08-2019, 09:19 PM   #7
Tool Guy - Kg
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They are all "before" photos? Oh, okay.

Can we have photos of the "after"? Preferably from the same vantage points as what you've already given us.

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Unread 08-09-2019, 08:05 AM   #8
Trask
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Hey Vero .. welcome to the Forum !
I like Bubbas request for more finished pics.

I am wondering if there is a “ top coat “ enhancer type sealer that was applied
... I have seen many of them on flagstone and Slate but usually in much older
Installs . This could be a UV issue and the carpet shielded the obvious area from the light . Most sealers that don’t fall into the “ impregnator “ category come from the janitorial side of the Industry... acrylics and such.
A good stone restoration company will be half chemist and probably be able to
Fairly quickly have a solution. I would bet it can be stripped chemically.
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Unread 08-11-2019, 09:34 AM   #9
piggyr00
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I attached the after cleaning photo. We didn't have the other room cleaned once we realized the cleaning didn't do anything, at least visibly.

I was thinking it could be UV as well, however the slate is in our walk-out basement. It's rather dark down there.

In general should area carpet not be used on slate?

Thanks again for the help!
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Unread 08-14-2019, 04:17 PM   #10
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I would tend to think its been abraded enough by the carpet and a little bit of grit under the carpet to change the color, provided that's what was there. The edge would take the most abuse and seems to be the worst area.

Try a color enhancer in a small area, should get you close if it has just been in theory "sanded"
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