Black marks on stucco


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Old 01-28-22, 08:03 AM
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Black marks on stucco

We had our house exterior painted about a year ago. My first house with stucco walls. I now noticed areas of the walls have little black dots. The painter said this is normal for stucco, but I donít know. Is he correct? Thanks!





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  #2  
Old 01-28-22, 08:08 AM
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Stucco is a cement material so it should not bleed out anything. Dirt on the new paint, maybe the old coating wasnt cleaned.

Did you try washing it off?
 
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Old 01-28-22, 08:17 AM
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I didnít want to scrub it and risk damage.
 
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Old 01-28-22, 08:31 AM
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Could be mildew.
Washing the painted stucco shouldn't hurt anything.
 
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Old 01-29-22, 04:01 AM
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On how much of the house is this happening? How high above the grade? Is it in sheltered areas? I’m thinking algae or mildew and probably because the wall was not cleaned. But try cleaning an area and see what happens. Maybe the paint was sprayed but not back rolled and left voids.
 
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Old 01-29-22, 06:45 AM
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I did wash it and it looks better. I donít think itís mold since I am in Arizona. It seems to only be on that side of the house.
 
 

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