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Likely bathroom remodel with mold removal

Hey everyone,


Here's the situation, an unnoticed slow leak from the master bathroom toilet tank has caused mold problems.  The water from the slow dripping had run back into the wall and into the vanity (which is made of particle board) over an unknown number of weeks.  As a result, I'm seeing mold against the wall behind the vanity as well as mold inside the wall (the plumber had cut out  a couple small sections of drywall and exposed this).  I've never personally seen drywall mold before but I'm guessing the black streaks are exactly that.


So I obviously have my work cut out for me.  It looks like I will need to gut the bathroom because of not only the mold but the cabinet portion of the vanity is warped because of the moisture.  First thing's first, the leak has been fixed so no more water has been escaping.  Now I need to figure out what I'm going to do about the mold.  I can't afford to pay for professionals to do everything so I'm going to have do to a lot of the labor myself.  


When knocking on the drywall, I can hear a distinct difference in sound about 2 1/2 feet up.  So I'm thinking if I remove the old vanity and toilet, I could cut the drywall up to maybe 3 feet, disinfect everything with bleach solutions, and install new drywall (using all the proper precautions for mold and spores of course).  Has anyone had any experience with removing interior wall mold before and can give any helpful advice?  I'm a novice when it comes to DIY remodeling so anything is appreciated.






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Posted 2012-09-23T04:27:18+0000  by jisoo411 jisoo411




Once the active mold has been physically removed or killed with bleach and the source of moisture halted, your job is largely done as far as mold remediation. However, it might be good to treat the area by spraying it down with Concromium. This is a clear, odorless, invisible  and even tasteless liquid. You can´t get much safer than this stuff! It leaves behind a type of salt which will prevent the return of mold.  Concromium is sold in the paint department at Home Depot.


Hope this has helped

Posted 2012-09-23T19:30:21+0000  by ordjen
Thanks for the reply ordjen. The more I thought about it, the more I realized that I may need a professional to do the mold remediation. I'm worried that spores will get out of the bath and into the bedroom or the rest of the place. I already got a price quote from a well-reviewed local mold remediation specialist and looks like it'll cost $1,800...ouch. This includes demoing the vanity, removing the toilet (both of which I would have needed to do anyway) and of course cutting out the affected drywall.

The professional also includes spraying the interior of the wall with Microban to help prevent mold from coming back. I'm kind of 50/50 on whether to go this route or continue with my diy approach. Any thoughts?

Posted 2012-09-25T06:17:16+0000  by jisoo411



Mold spores are always in the air to some degree. If there is not excessive moisture present, they won´t start actively growing. This is why good ventilation is so important in bathrooms, to evacuate the moisture as soon as possible.


The project does sound like something a good DIYér can handle. Do wear a mold rated particle mask until the mold has been removed or killed . It is a good idea to wash your work clothes soon thereafter too.

Posted 2012-09-25T19:00:24+0000  by ordjen

I own and operate DryHero in Lincoln Nebraska.  You are wise to at least consider have a professional evaluation of your mold.  It is true that there are mold spores everywhere in our environment but one of the biggest mistakes made with mold remediation is not controlling cross contamination.  Mold removal goes beyond just removing the impacted (mold contaminated) materials.  


Here are the steps a mold remediation professional might take:

1.     Install critical containment barriers using plastic material to make walls and cover vent openings, etc.

2.     Install negative air by evacuating the air from the work area to the outdoors.

3.     Install temporary HEPA air scrubber in the work environment to capture the mold spores being aerosolized during demolition.

4.    Carefully and deliberately remove and double bag contaminated materials.

5.     HEPA vacuum exposed framing materials.

6.     Wet clean and damp wipe all exposed materials.

7.     HEPA vacuum entire work area.

8.     Test for mold.

9.     Remove containment.


Now every mold remediation project is different but this gives you an idea of why mold is so difficult to do yourself...properly.  If you have questions, feel free to call DryHero, 6301 A Street, Lincoln Nebraska, 68510, 402-438-2379.  You can als visit us at

Good luck!

Posted 2013-08-26T15:31:39+0000  by dryhero
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