footpath cleaning

onzie

Our concrete footpaths have gone green and we don't want to powerwash them - would anyone have any suggestions on how to clean them?
Mods feel free to move if I have the wrong forum.

Al Capwned

Why would you not want to powerwash them???

onzie

We're reluctant to use a power washer because the footpaths are quite old concrete and we think the power washing will accelerate the crumbling process around the edges.

michael999999

Bleach and water.

BryanF

salt then water and a yard brush

reilig

BryanF wrote: »

salt then water and a yard brush

Don't use salt. It will eat through old concrete and cause it to ravel within a few weeks. Power washing would be far less severe than salt!!

aujopimur

Chlorus from agri. shop, dilute 5/1 apply when the paths are damp,give it a rub of a brush and wash off after an hour.

onzie

Thanks for the replies - I think there is probably a long enough footpath to try out each solution!

antoinolachtnai

You are right to be very careful with your paths and not to do anything that is too abrasive. But any of these chemical agents is going to have an impact on your path, and it will be very difficult to wash the chemical away fully.

cnocbui

If a pressure washer is going to dissolve the path, then algae isn't the only problem you have. I pressure wash mine and they come up like new.

I would suggest bleach as the obvious alternative.