Is sodium hypochlorite solution suitable for removing red algae from pebble dash/render?
I am going to clean the pebble dash on my house soon because it has developed red algae and looks absolutely terrible. The guy at the hardware shop told me that sodium hypochlorite would work but I'm not sure what dilution to use. I usually mix 1 part hypo to 4 parts water for cleaning concrete and it works very well. Would this same dilution be ok for pebble dash or could it cause damage? The hypochlorite solution I normally buy is 15%.
Submitted May 28, 2021 at 08:04AM by yaboypablo5429
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