Bleach on sandstone - Question: sandstone under bleach attack

[anders]

Hi. Apologies if this has been asked/answered before - I did do a search first but couldn't find a thread on it.
I have an indian sandstone patio which is taking on a greener & greener hue. Reading pavingexpert it seems that bleach is the recommended treatment for it. But before I start any irreversible actions on the stone can anyone confirm that I've understood the advice correctly - that giving the stones a drink of household bleach won't discolour them, make them turn orange to get me back, or give them white 'blooms', make them brittle etc? Thanks guys for any advice.

[lutonlagerlout]

the technique involves misting the patio with a bleach water solution ,leaving for approximately 30 minutes then blasting off with the jet washer
if in doubt do a small trial area first or get the professionals in
always use PPE when using chemicals
LLL

[RAPressureWashing]

If you look on the stains removal page there is a bleach mix info which will solve your problem. Follow the instructions to the letter and you shouldn't have any problems. If you have a look at our web-site )paving page) you will see some examples of Indian sandstone that has been cleaned with our chemical soloution.

[anders]

Thanks guys - I appreciate the help.