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Old 06-08-2008, 12:56 PM   #1
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painting over mold


I am going to repaint my shop, and notice that the north facing wall has some black rust or mold on it. Not a lot, and mostly under the laps. Do I hae to do anything special before painting, or just wipe (brush) off? Thanks for any info

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Old 06-08-2008, 07:56 PM   #2
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painting over mold


You need to kill the mold with a diluted bleach solution. You may also want to consider adding some mildewcide to the paint. While exterior paint already has mildewcide in it, it would not be a bad idea to give it a boost in at least your problem areas.

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Old 06-08-2008, 08:41 PM   #3
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painting over mold


You must kill it
Dead, dead, dead.
Wiping it off will not cut the mustard

The only acceptable alternative to a mildecide/fungicide would be a mold/mildew remover
Generally safer around plants, the peroxide based 'green' removers work well, as the target how the mold hangs on to the substrate, and release it fully, to be washed away

Mildecides kill the mold, but are more harmful to any vegetation they come in contact with, and don't necessarily 'release' it from the substrate
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Old 06-12-2008, 06:50 AM   #4
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painting over mold


I had a section of mold on a wall in my 'soon-2-B' office. The mold was on a wall that opposite the bathroom and the previous owners had a leak in the wall that went undected, and created a horrible moldy wall cavity that was hidden due to wallpaper. I found it when I removed the wp to refinish the room. I actually cut out the section of moldy DW, then thorughly cleaned the wall cavity (after assuring the leak was not from my work (I totally gutted/remodeled the bathroom last year), then put up new DW.

Godd luck with the mold.
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