Black marks on stucco


  #1  
Old 01-28-22, 08:03 AM
E
Member
Thread Starter
Join Date: Dec 2004
Location: USA
Posts: 129
Received 0 Votes on 0 Posts
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!





​​​​​​​
 
  #2  
Old 01-28-22, 08:08 AM
Marq1's Avatar
Member
Join Date: Sep 2016
Location: USA MI
Posts: 9,482
Received 946 Votes on 859 Posts
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?
 
  #3  
Old 01-28-22, 08:17 AM
E
Member
Thread Starter
Join Date: Dec 2004
Location: USA
Posts: 129
Received 0 Votes on 0 Posts
I didnít want to scrub it and risk damage.
 
  #4  
Old 01-28-22, 08:31 AM
M
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 49,235
Received 672 Votes on 595 Posts
Could be mildew.
Washing the painted stucco shouldn't hurt anything.
 
  #5  
Old 01-29-22, 04:01 AM
T
Member
Join Date: Jul 2003
Location: California
Posts: 2,066
Received 34 Votes on 28 Posts
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.
 
  #6  
Old 01-29-22, 06:45 AM
E
Member
Thread Starter
Join Date: Dec 2004
Location: USA
Posts: 129
Received 0 Votes on 0 Posts
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.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: