How to stop algae on concrete?

[bloossam]

Hello there !! 

New here

I got a huge concerete backyard with shade on the top. Few parts of my yard doesnt have shade and when its wet season, i found it gets green with moss / algea. Doesnt look good at all. Anything i can do to avoid it 

[EricL · Accepted solution]

Hello @bloossam, 

Welcome to the Bunnings Workshop community. It's wonderful to have you join us, and thanks for sharing your question about your concrete backyard.

I suggest using 30 Seconds 5L Outdoor Cleaner Concentrate in combination with an Oates Long Handle Deck Scrub Brush. I recommend using a Gerni 3600 1810PSI 1500W High Pressure Washer to deep clean the surface.

For continued maintenance, I suggest coating the surface with 30 Seconds 5L Spray And Walk Away Concentrate. This will provide control and management of your exposed concrete and slow down the growth of mould and mildew in your backyard.

If you need further assistance, please let us know.

Eric

[bloossam]

Thanks Eric. 

Will def will try this weekend.

For the walkaway treatment, how often do you recommned ? Every year or 2 !! 

Thanks Heaps

[EricL]

Hello @bloossam 

It all depends on how bad the moss and mould build-up are. If it is not so severe then every two years would be ideal. However, if the growth is persistent, then once a year might be more appropriate.

If you need further assistance, please let us know.

Eric