[J.Will]

Some advice on whether this could work...
A customer has an old sandstone floor in utility room (been down for over 35 years) in pretty good nick but dirty....given a mop once every 6-8 months in recent years.
Would this work to freshen it up: (the obvious tape/mask/seal off/silicone bead any outlying areas/nearby woodwork etc first)
-thoroughly wet
-high alkaline cleaner
-scrub with crb (soft or medium brush)
-neutralise
-wet vac up
-impregnating colour enhancing sealer after a few days once dried completely to bring it up and help maintain spills etc. 
Haven’t accepted the job just wanted to know if a crb would be any good on this. Someone recommended adding honing powder into the mix to really help bring it back to life.
Thoughts appreciated. Thanks.

[Kev Martin]

What’s a CRB

[J.Will]

Counter rotating brush machine

[Red_Panda]

We clean a lot of sand stone.  Any form of agitation followed by rinsing will improve the situation.  What we found was this, the stone would re-absorb the slurry in some areas leaving the floor with shadows.  If you then seal it after sufficient drying time, you seal the soil in.

We invested in spinners for sandstone and the difference in the cleaning is amazing.  One or two decent jobs will pay for the spinners.

David.

[Kev Martin]

We clean a lot of sand stone.  Any form of agitation followed by rinsing will improve the situation.  What we found was this, the stone would re-absorb the slurry in some areas leaving the floor with shadows.  If you then seal it after sufficient drying time, you seal the soil in.

We invested in spinners for sandstone and the difference in the cleaning is amazing.  One or two decent jobs will pay for the spinners.


David.

David

I am a little confused!  We have cleaned 1000’s & 1000’sM2 of  floors of all types including sandstone and many other porous stones that easily absorb dirt.  If you follow one of the most basic of all floor cleaning rules and thoroughly prewet the floor first  then  firstly the floor is a lot easier to clean and nothing will be absorbed at all. 

Kevin

[Red_Panda]

Thats true Kevin, but we find the spinners to be a lot quicker and produce a more even result for less effort.

Thanks, David.

[Kev Martin]

Thats true Kevin, but we find the spinners to be a lot quicker and produce a more even result for less effort.

Thanks, David.

There is no spinner in the World that I have ever used that cleans better than a Rotary Machine with the correct brush and chemicals.  I have owned and used both a 300 Bar and a 500 Bar machine both using FSC’s with vacuum take off and heated.  A rotary spinning at 154 rpm with a medium ppn brush did a better job.  But that said it must be 8 years since I sold my Falch machines so perhaps there are better FSC’s out there today that I don’t know about

[J.Will]

We clean a lot of sand stone.  Any form of agitation followed by rinsing will improve the situation.  What we found was this, the stone would re-absorb the slurry in some areas leaving the floor with shadows.  If you then seal it after sufficient drying time, you seal the soil in.

We invested in spinners for sandstone and the difference in the cleaning is amazing.  One or two decent jobs will pay for the spinners.

David.

Thanks David great advice. Currently the first wet scrub has brought up some algae which now seems to be closer to the surface. These floors have never been sealed. Will look into spinners now but any advice re treating the algae (green/dark smooth patches)would be much appreciated guys!
Thanks