Cleaning render

[cwr]

Hi folks

Any recommendations for something to spray on render to get rid of green algae? It's a white thin coat Weber render. Plenty of trees near by so guess I'll be doing this every couple of years...

Thanks

[ProDave]

I spray with diluted bleach from a spray bottle.  Best done when you are expecting rain shortly afterwards to wash it off.

[saveasteading]

4 minutes ago, ProDave said:

from a spray bottle

Or a garden weedkiller in a garden spray, as they can usually scoosh further. .  Do NOT use a pressure washer or you could lose the render.

[nod]

pick a dry day 

Dilute 3-1 Spray on Pump sprayer or what ever you have 

Let the rain do the rest 

[cwr]

Thanks for the replies and suggestions.

I had tried diluted bleach but it had no effect, it may have been too weak a mix though.