Painting outside garden wall

[AndroidMan]

Painted a garden wall last year and what looks like mould and moss is appearing around the block joints a year later
Its just a perimeter wall, not connected to the house.
What can i put on it before painting next time to prevent this mould coming through?
I did give it a good power wash last time but maybe not enough.

 

[Leper]

1. Power Wash it again and remove moss + lichen and . . .
2. When dry use a large paint brush (not a roller) to put a coat of diluted Domestos on the wall.
3. When dry paint again and you can use a roller (but don't use cheap paint).

 

[Saavy99]

1. Power Wash it again and remove moss + lichen and . . .
2. When dry use a large paint brush (not a roller) to put a coat of diluted Domestos on the wall.
3. When dry paint again and you can use a roller (but don't use cheap paint).

Very sound advice

 

[SPC100]

I'm not sure but I thought 'real' painters use some form of anti fungal spray or similar before painting.

 

[Fidgety]

Power washing can accelerate moss, lichen and general gunge on concrete, stone and roof tiles. That said, domestos should see it off.

 

[AndroidMan]

Thanks - l will rry that.
What ratio of bleach to water?

 

[Leper]

1. Anti fungal spray is more expensive than bleach, but bleach is just as good even the economy products e.g. Dunnes, Aldi etc own brands.
2. Ratio of Bleach to Water:- Use as much bleach as you can afford and paint it on unsparingly. (Use eye protection, I should have mentioned this earlier) and keep children at at distance.