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Old 08-08-2011, 08:46 PM   #1
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Bathtub = Black caulking, orange grouting


Been in my home for a few years now and this is the first time this has happened. The grouting on my bathtub tiles have gone orange and the caulking grey/black. What's causing this? Could it be something with my hot water tank? I haven't flushed it for a couple of years now although I planned to do it in the coming up fall. Could it be the extremely humid summer that has hit Winnipeg?

I plan on changing the grout and caulking but I decided to put that in a different thread found here if you can provide some insight in that topic as well.

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Old 08-08-2011, 08:53 PM   #2
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Bathtub = Black caulking, orange grouting


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Originally Posted by John84 View Post
Been in my home for a few years now and this is the first time this has happened. The grouting on my bathtub tiles have gone orange and the caulking grey/black. What's causing this? Could it be something with my hot water tank? I haven't flushed it for a couple of years now although I planned to do it in the coming up fall. Could it be the extremely humid summer that has hit Winnipeg?

I plan on changing the grout and caulking but I decided to put that in a different thread found here if you can provide some insight in that topic as well.
Orange could be rust and the gray/black, mold.
If it's rust, there should be residue in sinks and the tub.
How long has this been going on?

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Old 08-08-2011, 08:56 PM   #3
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Bathtub = Black caulking, orange grouting


Orange can be the bacteria reacting with the soap scum. We get it all of the time if we do not clean the tub on a regular schedule. Tilex, Scrubbing bubbles does wonders, along with some elbow grease once a week.
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Old 08-09-2011, 09:14 PM   #4
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Bathtub = Black caulking, orange grouting


I agree with gregzoll, we used to get that in a windowless bathroom in an apartment we lived in, it was like Halloweentown if the tub and tiles weren't cleaned/bleached regularly.
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Old 08-13-2011, 10:16 AM   #5
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Bathtub = Black caulking, orange grouting


Thanks for the responses. This just happened this summer and I have lived here for over 3 years now. Although we did just redo the caulking last year because it was discolored although nothing like it is now.

So, this was probably just a matter of not regularly scrubbing the bathtub area?
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Old 08-13-2011, 12:10 PM   #6
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Bathtub = Black caulking, orange grouting


Since you just redid the caulking, what kind did you use? Even with the clear silicone with anti-microbal/anti-mildew, we still get problems. Nothing though that scrubbing bubbles will get rid of with regular scheduled cleanings every other weekend, with Tilex sprayed every weekend. You can also make home made all-natural disinfectant spray http://www.ehow.com/how_2162389_toxi...y-cleaner.html

http://search.yahoo.com/search;_ylt=...&cop=&ei=UTF-8
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Old 08-13-2011, 01:13 PM   #7
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Bathtub = Black caulking, orange grouting


The grey/black sounds like a mold/mildew problem, try a tub/shower cleaner with clorox bleach in it.

While the orange could be rust, I think it is highly unlikely, as there should not be metal involved in the grouting. Based on a past experience, I ask if anyone who uses this unit uses any type of hair dye or shampoo containing dye to touch up their hair? Several years ago a customer called us a few months after a bath remodel to say that "rust spots" were appearing in the grout of their shower. I indeed was perplexed, as her description of their appearance was quite accurate, but I knew there was no iron anywhere in the unit to be rusting. As we worked to remove the spots, I happened to glance up to the shower niche and saw a clear plastic bottle of a dark oxblood colored liquid. Upon examination, it was a shampoo containing hair coloring that her husband used. When we put some on a wet rag, the resulting color was identical to the "rust" in the grout. We asked them to discontinue its use, and call if the rust spots came back. Never heard about the problem again.

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