I could use some advice on my method. The algae and moss were really old and bad, so I opted to dust off the Xjet and 3% the sucker. Waited 10 minutes or so and turbo’ed the extreme edges.
This was taking a while so I busted out the surface cleaner and all it did was polish off the lighter algae. In the end I had to turbo the whole thing. The customer and I discussed the mortar and she actually wanted everything (edit: the moss) blasted out of the cracks as they are having it repaired.
Do NOT blast the concrete out… We are pressure CLEANERS not RESTORERS… If you do make sure you sign a waiver or something before it comes and bites you in the a**. Let the concrete guys/owner who are fixing it take care of that. What ever chunks come off GREAT, anything left just say they need to pick at it with a hammer, chisel or however they remover the mortar.
I didn’t blast the concrete out, they wanted the moss taken out of the existing cracks so the mortar guys could work on repairs. I may not have made that clear.
