Green on outside walls

ioscorpio

What's the best way to remove green (I think moss) from house wall at the back, I think it's from when I had a leaking gutter and from crap off the oak trees the other side of the back fence. Moss also gets deposited on the concrete patio.
The guy that changed my guttering suggested brick acid but I dont want to damage or discolour the bricks

john0612

a fungisidal wash or bleach should do the trick .

Katykat

I find using a power washer is best, no dodgy chemicals to deal with. However, I usually end up going all the way round the house & clean the windows & drive too, so either be disciplined & JUST do the wall, or make time to do the lot

GreenB_2

It you are using a pressure washer be very careful., its all to easy to blast the mortar away and/or the surface of the bricks if the pressure is to high. A scrubbing brush in a weak bleach solution is probably the best bet.