Algae on walls

ChrisBan

I have the same problem, I buy Chloros, it's used by farmers for a variety of sterilisation purposes, get it in my local Co- Op Stores for a few Euro, dilute as per instructions on the container, apply with a sprayer, leave for a short while and wash off with water.

_Brian

ChrisBan wrote: »

I have the same problem, I buy Chloros, it's used by farmers for a variety of sterilisation purposes, get it in my local Co- Op Stores for a few Euro, dilute as per instructions on the container, apply with a sprayer, leave for a short while and wash off with water.

Yep.
Best solution.

The product is Hypachloride which is sold under many names. Should be about €20 for a 20l drum.

Coley35

Yea I agree, Chloras can be purchased at your local Co-op (€8.50 per 5ltr drum). Wet the path/wall, spray on Chloras mixed with water as per instructions, leave for 15-30 minutes and then wash off with garden hose, should do the job!

tommycahir

Coley35 wrote: »

Yea I agree, Chloras can be purchased at your local Co-op (€8.50 per 5ltr drum). Wet the path/wall, spray on Chloras mixed with water as per instructions, leave for 15-30 minutes and then wash off with garden hose, should do the job!

Would that also deal with the footpaths turning greenish/black ?

Coley35

tommycahir wrote: »

Would that also deal with the footpaths turning greenish/black ?

Yea it's good for that too.

tweek84

Sorry to drag up an old thread but has anyone used chloras on coarse brick to clean off black lichen? Any idea if the chloras damages the brick?
As I said it is coarse brick not the smooth brick.

Thanks

poker--addict

So for red algae, bleach 50/50 and no need for 4 drums of 80 euro biocide ?

some companies out there charging nearly 2k to soft wash house

GBX

What would be the best option for rendered outside walls showing signs of algae?

Klopp

I have used Actiwash and it worked well on our rendered walls. The difference after a couple of weeks was worth it.

mikehn

https://www.boards.ie/discussion/comment/121423214#Comment_121423214

I used the bleach trick and got excellent results.

poker--addict

Bleach changed red algae to a much more faded green in my case. Not sure will that wash away - doubt it at this stage. A lot better than dark red though.