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Old 05-14-2015, 10:15 PM   #1
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What is this growing on my bathroom baseboard? Mold?


This is a newly remodeled house. Below are pictures from one of my bathrooms that I rarely use. Having not been in there for a few months, I was surprised to walk in there and see all these weird stuff on my baseboard. Any idea what this is?

What could be causing this? I don't use this bathroom, so I don't understand what would be causing it.

Thanks in advance.
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What is this growing on my bathroom baseboard? Mold?-img_2049.jpg   What is this growing on my bathroom baseboard? Mold?-img_2050.jpg   What is this growing on my bathroom baseboard? Mold?-img_2047.jpg  

Last edited by mikelee221; 05-14-2015 at 10:20 PM.
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Old 05-15-2015, 06:02 AM   #2
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Looks like moisture damage to MDF trim--

The stain on the grout? What is that wall? Is there a window? Interior wall? Nail through a pipe or leak from outside ?

More info needed.
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Old 05-15-2015, 06:40 AM   #3
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Concrete block or brick outside walls?
Slab floor?
Letting us in on location may add ice dam damage to the list.
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Old 05-15-2015, 10:35 AM   #4
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Not ice damage, since it does not snow here. I live along the coast in California.

What you are seeing is the interior baseboards in my bathroom. The location is around the toilet. There are no windows to this bathroom.

I don't know if there is is moisture leaking unless I remove the boards. I don't use this bathroom so it can't be from the shower steam. Does any of the damage look familiar?

Thanks.
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Old 05-15-2015, 04:02 PM   #5
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Yes, that is typical MDF trim with water damage. Is the trim MDF (medium density fiber board)?
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Old 05-15-2015, 09:38 PM   #6
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I don't know for sure... but I think it's MDF.

I posted some additional pics for some reference. Where could the water be coming from? Behind the wall? I just don't understand the source.
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What is this growing on my bathroom baseboard? Mold?-img_2051.jpg   What is this growing on my bathroom baseboard? Mold?-img_2052.jpg   What is this growing on my bathroom baseboard? Mold?-img_2053.jpg   What is this growing on my bathroom baseboard? Mold?-img_2054.jpg  

Last edited by mikelee221; 05-15-2015 at 09:40 PM.
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Old 05-16-2015, 10:41 PM   #7
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It's very common for glass shower doors to have a slow leak. It looks like there a slight leak and the baseboard got wet and grew a little mold. You can clean it with bleach and get the leak fixed. Caulk might work.
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