A few years ago I had my back yard paved over but every winter it gets covered in green algae. At the moment its so thick it looks like a lawn !!!! I have a pressure washer and try and keep it clean but with this weather its getting worse. Don't get much sun out there so that doesn't help I think. Is there a varnish or something similar I could paint over them. I have painted the walls white but its starting to appear on them as well. Any advice would be appreciated.
Edited by Mark (28th Feb 20143:22pm) Edit Reason: renamed
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#861327 - 28th Feb 20143:11pmRe: Mould On Paving stones : Any Solutions ?
Registered: 20th Sep 2010
Loc: New Brighton
This'll sound strange, but fill a cheap spray bottle with white vinegar and spray it on the algae. After you've sprayed it on, just leave it. It won't look as though it's done anything but after a few days the algae will start to lift off and clear itself. No scrubbing required.
#862274 - 4th Mar 20149:21amRe: Mould On Paving stones : Any Solutions ?
As with Chris.... bog standard cheapo bleach from Tesco's, Asda, Lidls et al. Used it for years on north facing paved areas etc. Pour it on and brush gently to cover all the area. Leave for a few minutes. Use a hard yard brush and scrub (no need to go mad). Swill off with plenty of cold water. Warning... worms in the immediate run-off area DON'T like it ! It also retards the return of any green gungy stuff* for quite a while.
* Apologies for the use of detailed scientific description!
I bought white vinegar for household use last year. As I was at Light Cinema at the time I bought it in New Brighton but cannot remember if in Home and bargain or Morrisons. Not used it since but suppose handy to have in.