Retaining Wall Cleaning

[muffin_dad]

Is there a TPF type method for cleaning retaining walls and flagstone?

I have a power washer and could use simple green or bleach but I'm hoping there is some magic formula like sodium bicarbonate and vinegar!

Sent from my iPhone using Tapatalk

 

[Patrick_B]

Those two things will react and neutralize each other. Is it the Green you are trying to remove? If so, I would soak with diluted bleach to kill it, then and rinse/powerwash it off.

 

[muffin_dad]

Oxyclean and a pressure washer worked great!


Sent from my iPhone using Tapatalk

 

[JoyfulNoise]

Oxyclean is a mixture of sodium percarbonate, sodium carbonate and some perfumes/etc. The percarbonate supplies the peroxide which is a bleaching/oxidizing agent and will definitely kill that moss (chlorine bleach works better). But here's the kicker....it's going to grow back. You need to kill it really good (*cough* *cough* bleach! *cough* *cough*) and then, you need to seal the stone. If you don't seal the stone, the moss will simply grow back again. But, as long as you don't mind the annual cleaning, you can leave it as-is....

*cough* *cough* ... use bleach .... *cough* *cough* .... dang pollen allergies.....

 

[muffin_dad]

I power washed it too. Next year bleach!