[Simon Campbell]

Hi guys

A customer who has moved to a new house wants the patio cleaning. I have visited the new place at the start of the new year and thought the patio was Indian stone myself however she has said it is Yorkshire stone which cannot be jet washed.  If this proves to be the case but why cannot it be jet washed...and what method would you use as an alterntive?

Many thanks in advance

Simon

[nathankaye]

Many say cant jet wash indian stone but is that more to do with the joints as well. Ive used a fsc on indian stone and had great results and so i would imagine same on yorkshire stone. But im no expert, but thats what i would do.

So im interested in what the stone specialist guys jet washing would say..

[Ian101]

from my limited knowledge of York stone it can be jet washed but apparently this wont clean it as the dirt is engrained and not on the surface so prob will look same after cleaning.

[Tony Edwards]

Hi guys

A customer who has moved to a new house wants the patio cleaning. I have visited the new place at the start of the new year and thought the patio was Indian stone myself however she has said it is Yorkshire stone which cannot be jet washed.  If this proves to be the case but why cannot it be jet washed...and what method would you use as an alterntive?

Many thanks in advance

Simon

I cleaned some York stone with a turbo nozzle and then  hypo. It looked a lot better but engrained stains are impossible to remove
Just advise the customer before you start

[Kev Martin]

York stone or any other stone is easy to sort.  Experiment with my method below on 1m2 of the dirtiest part until you find the quickest and best formula.  In other words don't go at it like a bull in a china shop, do a test area first.

1.  Pre wet the stone so it is saturated to the point of pooling
2.  Clean with a slow speed mono rotary fitted with soft to medium brush and Xtreme HDT& G cleaner
3.  Allow to dwell and agitate again then vac and rinse with clean water and then vac again
4.  If the stone is still not clean repeat step 3 above but this time add Honing Powder 320 Grit if that fails use Miracle Poultice A and couple it with Miracle Poultice B in the worst scenario.
5.  Once it is all done and totally dry seal it with Miracle 511 Porous Plus and the next time you clean it will be a breeze.

[Mike Halliday]

In my opinion  The quickest and easiest method of clean  York stone  is powerwashing using either a FSC or a lance, followed by an application of hypo to remove any black spots.

Here's a video showing the results this method can have.  ( Yorkstone  cleaning start halfway through )

https://www.youtube.com/watch?v=dbgWjdzGZOg

Kev offers an alternative method, I would love to see a video of this method in action as I can't see how it's quicker, better, easier or cheaper ( therefore can't see a reason to clean in such a way)

[Simon Campbell]

Gentlemen thank you all for your responses. I will take some before and afters when I go and let you know how I approached it 

[Kev Martin]

In my opinion  The quickest and easiest method of clean  York stone  is powerwashing using either a FSC or a lance, followed by an application of hypo to remove any black spots.

Here's a video showing the results this method can have.  ( Yorkstone  cleaning start halfway through )

https://www.youtube.com/watch?v=dbgWjdzGZOg

Kev offers an alternative method, I would love to see a video of this method in action as I can't see how it's quicker, better, easier or cheaper ( therefore can't see a reason to clean in such a way)

Mike

I have been here before with you!  It is clear you think pressure washing produces a better result I know it doesn't.  I didn't say the mechanical cleaning method was quicker, easier or cheaper but it does produce much better results if carried out step by step as per the method I have posted above FACT!

Kevin

[jobjetting]

In my opinion  The quickest and easiest method of clean  York stone  is powerwashing using either a FSC or a lance, followed by an application of hypo to remove any black spots.

Here's a video showing the results this method can have.  ( Yorkstone  cleaning start halfway through )

https://www.youtube.com/watch?v=dbgWjdzGZOg

Kev offers an alternative method, I would love to see a video of this method in action as I can't see how it's quicker, better, easier or cheaper ( therefore can't see a reason to clean in such a way)

Mike

I have been here before with you!  It is clear you think pressure washing produces a better result I know it doesn't.  I didn't say the mechanical cleaning method was quicker, easier or cheaper but it does produce much better results if carried out step by step as per the method I have posted above FACT!

Kevin

Any videos of this method? I've never seen it done before.

[Kev Martin]

To be honest we rarely do videos on cleaning the results speak for themselves!  We only produce videos when we do restorations and even then we rarely make them available for public viewing mainly due to confidentiality agreements. However, that said there is clearly a lot of interest in the process and amazingy a large degree of sceptism!  So with that in mind I will make a video of the next stone clean we do!

[Simon Campbell]

Yes please Kev...I would be really interested to see it done with a mono rotary cleaner as like BDCS says I only have the power washer available at this moment in time.

[Mike Halliday]

Why don't people try both methods ? Usually because they only have a pressure washer. I get the mono out now and again to make a change, How can you tell Yorkshire stone - its really thick 

I've tried both methods although not to the extent of using honing powders but have tried scrubbing with chemicals with a rotary and a cimex.

I think the difference in opinion comes from discussing 2 different jobs, Kev is (I believe)  when using honing powders is removing the top surface of the stone therefore removing any dirt, I have seen how this process and it is incredibly effective at renovating/cleaning stone. But in my opinion ( I always use the term  in my opinion as that is all it is )  this method is not practical for outside areas and more suited for internal floors

I have never, after watching 100s of videos from every corner of the world seen a single video of this method being used to clean outside stone, but if you search 'cleaning Yorkstone' on YouTube you can see a similer process as Kev mentions as the first video listed ( for my search anyhow)

[chris scott]

I have both machines...I will give them both a go next time I get a bit of stone to do.
What "dirt" are we trying to remove? Usually  its just on the surface and slippy .
There are other types of "dirt" For those that are interested .
An interesting read although far from conclusivie
http://www.qub.ac.uk/geomaterials/geomonumental/links/poster_stone_decay.pdf

[Kev Martin]

This subject  is a lot more involved than what people think!  In some instances you may get away with pressure washing and a bit of Hypo but in the case of heavily soiled stone it is my experience that the chemical / mechanical approach we use works better.

York stone or any other stone is easy to sort.  Experiment with my method below on 1m2 of the dirtiest part until you find the quickest and best formula.  In other words don't go at it like a bull in a china shop, do a test area first.

1.  Pre wet the stone so it is saturated to the point of pooling
2.  Clean with a slow speed mono rotary fitted with soft to medium brush and Xtreme HDT& G cleaner
3.  Allow to dwell and agitate again then vac and rinse with clean water and then vac again
4.  If the stone is still not clean repeat step 3 above but this time add Honing Powder 320 Grit if that fails use Miracle Poultice A and couple it with Miracle Poultice B in the worst scenario.

My suggested method above,  is in the first instance(Step 2) a chemical clean using an agitation system coupled with a High Alkaline cleaner and a dwell time.   Then the addition of Honing Powder(Step 4) boosts the chemical cleaning by adding a mechanical clean at the same time as the chemical clean through abrading a few microns off the surface therefore peeling a little of the surface off.  My final solution (In Step 4)  is totally different in that, by using Miracle Poultice A it incorporates  Nanotechnology by reducing the particle size of the High Alkaline Cleaner to allow it to penetrate deeper and therefore give a deeper clean.  Then if you were to add Miracle Poultice B to the A it is further boosted because you are introducing an oxygenation process as well.

I have extensively tested this method on dozens of different floors both inside and exterior and found it to be the best IMHO

[Simon Campbell]

Just a quick update guys as I did say I would try and post some before and afters ( which I've hopefully attached !) . Customer themselves wanted to hypo so did as I'm told 

[Simon Campbell]

Must have had my iPad upside down when I took the after pic 

[chris scott]

Thats not from Yorkshire.

[Simon Campbell]

Only what I'm told! Main thing customer is happy

[Smurf]

Thats not from Yorkshire.

B&Q maybe 

[Smurf]

Just a quick update guys as I did say I would try and post some before and afters ( which I've hopefully attached !) . Customer themselves wanted to hypo so did as I'm told 

Nice job 

YEHAAA!