Cleaning Stone Sills

[essex boy]

I have to clean a friends mansion tomorrow. It's gonna take 3 hours just to clean the windows. The sills are made of a light grey stone but have dirt ingrained into them. I had a quick go with the pole last time but it did nothing.

What works?

 

[David Taylor]

Contact a surface surgeon who specializes in hard surfaces. otherwise sills might get discoloured on your friends expensive mansion.

 

[mr shine]

ive used chloras a couple of times on these and it works great ,but i always test a discreet area first just to be sure , its just sprayed on and a small scrub , then leave it to soak in and rinse . just be sure not to get any near plants or flowers or it will kill them .

 

[HotWash Window Cleaners]

To be honest it depends what type of stone they are.

 

[Smurf]

http://www.stonehealth.com/stone-cleaning-products/doff-system/

 

[M.K Cleaners.co.uk]

Steam clean or sand blasting depending on the stone type

 

[essex boy]

I tried fairy liquid and a non abrasive cleaner as suggested by my local cleaning wholesaler but no good. The guy in the shop said the only way to do it is using a jet washer on a medium setting,.