How can I remove these spots on my exterior stuccoed wall?


I have been noticing these spots on along the second level of my home on the exterior west facing wall. We do get a lot of wind, could it be dirt. What could be causing this?

q how can i remove these spots on my exterior stuccoed wall
  11 answers
  • Kelli L. Milligan Kelli L. Milligan on Dec 18, 2018

    My first thought was mold, but probably just dirt. Have you tried to just hose it off?

  • Fiddledd224 Fiddledd224 on Dec 18, 2018

    Use a gentle power wash

  • Kmdreamer Kmdreamer on Dec 18, 2018

    It’s from dirt on the roof you would try power washing the wall if not paint it

  • Anne Behnke Anne Behnke on Dec 19, 2018

    I would try mold and moss killer. Home improvement stores carry it. It attaches to your hose, wet it down and the next day....gone.

  • Ticia Ticia on Dec 19, 2018

    I think one of the other posters is correct about it being dirt from the roof. You might want to get the roof power washed first. We had ours done last year (it was never done previously and was 10 y/old) and it made a huge difference. After that, power wash the house. Good luck

  • Pamela Pamela on Dec 19, 2018

    Hi ! Does it always look the same or does it seem to be more noticeable on some days ? To me it looks like it is damp , like it is holding moisture. It looks like it is between the wall studs or beams. I don't think it's just dirt coming off your roof , because you have a wide overhang . I hope it is just dirt , would be easier to take care of, over a mold issue. As for power washing, check with an expert first of do some research , you don't want to damage your stucco ! They make a product called set it and forget it , check to see if that can be used on stucco . Good luck !!!

  • Wil Wil on Dec 19, 2018

    Good Morning I lived in Sacramento Ca I’m maintenance for HOA and I used stucco cleaners used power washing light wash please not used high power or your stucco will be removed.

  • Suzanne Suzanne on Dec 19, 2018

    i Had this same problem. It was too high on the house I put tilex in a super squirting children’s squirt gun andmit worked like a charm‼️👍🏻 I hosed down the area afterwards with clean water. If that doesn’t do the may have a problem with your stucco. Hope not

  • Sabrina's Organizing Sabrina's Organizing on Dec 20, 2018

    If it is mold, I like to use wet and forget brand product with a telescoping pole and softer bristle brush.

  • Robert Robert on Dec 20, 2018

    Spread bleach on it AND THEN pressure clean it with a gentle spray washer, don't get the unit's tip too close to the wall. Does that wall ever get exposure to the sun? Probably noy