Cleaning mold off of a painted concrete pool deck

[swimmy22]

What is the best way to clean mold off of a painted concrete deck without damaging the finish on the deck? Can I use my power washer on a lower setting and use diluted bleach to clean the deck or should something else be used? If it is okay to use my power washer on a lower setting, how can I keep the moldy water from getting into my pool? I could hire someone to soft wash the deck, but I really hate to do this unless I absolutely have to. The deck is almost black so there is a lot of mold to remove.

 

[Bperry]

What is the best way to clean mold off of a painted concrete deck without damaging the finish on the deck? Can I use my power washer on a lower setting and use diluted bleach to clean the deck or should something else be used? If it is okay to use my power washer on a lower setting, how can I keep the moldy water from getting into my pool? I could hire someone to soft wash the deck, but I really hate to do this unless I absolutely have to. The deck is almost black so there is a lot of mold to remove.

Take a look for a “pressure washer surface cleaner” attachment for your pressure washer. They make it a bit easier to clean off the deck without spraying water everywhere. But if the deck is graded “into” the pool, the runoff will follow gravity. The tool needs a minimum pressure to work well because it splits the output into 2-3 separate jets so each one is a little lower pressure than a single one.

No way to tell if your deck surface can take it. Depends on what it’s made of and how old it is. I used one on mine which is stained with Behr concrete stain.