Pressure Washing mildew UNDER YOUR HOUSE

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  #1  
Old 02-20-18, 02:55 PM
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Pressure Washing mildew UNDER YOUR HOUSE

i have some water issues that I HAVE found out where water was coming in.. Iam fixing that problem.
What I see is mildew that has come under the house.. It is a dark blue no white..

How to remove this? Can i pressure wash it off.. Like spray on a mildew remover and then wash it all off?>??
This is on one end of my house, I have a 8gpm hot washer
 
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  #2  
Old 02-20-18, 04:00 PM
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Pics would give us a better idea of what you have going on.
I normally spray a bleach/water solution on the mildew and the rinse with a pressure washer.
 
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Old 02-21-18, 09:55 AM
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how long let is set before you wash it off??
 
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Old 02-21-18, 09:59 AM
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I let it set but not dry, then rinse.
 
  #5  
Old 02-21-18, 03:33 PM
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I was told to spray on Sodium hydroxide or sodium hypocrite 50/50 then revise off
What you think about either??..

Tks for your thoughts on this matter..
 
  #6  
Old 03-05-18, 08:23 PM
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How about RMR 86 will that do it???
 
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Old 03-06-18, 04:24 AM
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It should work although I don't have any experience with that product. I almost always use bleach because it's cheap and effective.
 
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Old 03-06-18, 12:26 PM
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Im going to mix in a gallon of bleach with it
 
  #9  
Old 03-19-18, 11:45 AM
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What is the mold on? Im not sure spraying more water under a house that already has mold is the best idea.
 
  #10  
Old 03-19-18, 12:07 PM
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Its all on plywood and joist.. It is 3' tall craw space..
putting it on with a 2 gallon sprayer,,
 
  #11  
Old 03-20-18, 11:16 AM
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Id get a chemical that is designed for killing mold. Bleach kills mold but has no kill time past 24 hours. Most chemicals designed for killing mold can kill up to 6 months. once the bleach is gone from your mixture you are left with the water. water is what caused your issue the first time. I would not fix the mold issue until you have fixed the water issue.
 
  #12  
Old 03-20-18, 11:40 AM
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I have not yet tried "Wet and Forget" but there is some here for mold/mildew on our concrete patio...a lot of which is in the shade.

It is 10% Alkyl Dimethyl Benzyl Ammonium Chloride. Spray on and do not rinse or touch again. Takes awhile to work.
 
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