Cleaning concrete


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Old 04-08-21, 08:28 AM
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Cleaning concrete

I built this basement entrance in my home several years ago. It’s been rock solid. There is a small landing to a door exiting the main floor above it. By the second season after its construction I began to have issues with what appears to be algae and grime etc.

I assumed that this was due to lack of air movement. I installed an outdoor fan that runs on a timer for 15 minutes out of every hour. It does help a bit but not much.

two seasons ago I got out there with PPE and sprayed a bleach concentration over the walls and steps. It worked a little..... not great .....and as you can see it came back fairly quickly.

My question is… Is there a way to prevent this altogether? Something I can apply to the concrete?
my question is… Is there a way to prevent this altogether? Something I can apply to the concrete?

Would welcome any suggestions… Maybe a sealant of some sort?







 
  #2  
Old 04-08-21, 08:36 AM
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There isn't anything you can do to prevent the algae growth except for regular cleaning. Spray it with bleach and then go over it with a pressure washer.
 
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Old 04-08-21, 09:02 AM
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Cool damp conditions are ripe for mold.

For roofs they use copper strips to leach copper sulfate to stop mold, I just looked and sure enough they make sprays with this to kill and halt it from coming back.

Have never used so I cant recommend!
 
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Old 04-08-21, 09:19 AM
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Copper strips.... I’ve never seen that. I’ll look into it
 
 

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