How to clean retaining wall blocks?
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Power washing not removing mold from retaining wall blocks. Suggestion
Tried vinegar and water. Tried bleach and water. How do I get rid of the mold?
Just hose them down with a garden hose. Or a pressure washer. If they need a bit more, brush first with a stiff bristle brush. Then hose down.
Elaine: this may be a job for a power washer! You can rent one at Home Depot.
Hi Elaine, if you have or can rent a power washer it will be clean in no time at all
https://www.youtube.com/watch?v=_1uBD5MBXTw
If not you can try a mild soap and water with a scrub brush, rinse with garden hose
pressure washers have come down in price. Invest in one for about $80 and you will find a lot of uses for it.