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Slate Paving Slabs

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parkesy:
Is it OK to pressure wash Slate Paving Slabs?

I have been told they can show stripes which can be impossible to shift.

If it is OK to pressure wash then is water alone enough or do I need to use something else?

Thanks

Kev Martin:
A lot depends on the M2 involved and the equipment you have.  After all there are pressure washers and pressure washers.  We have a fairly big pressure washer set up and some decent rotary surface cleaners.  Personally however especially on Riven Slate I prefer to use a Rotary with Soft to Medium Nylon Brush, some high alkaline and a decent wet vac.  Alternatively why don't you do a test area with your pressure washing set up.

Kev Martin
Marble Life Ltd

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