Pressure washing stonework

Question

Is it safe to pressure wash exterior stonework to clean it up?

David · Answer

Yes, absolutely. Just don’t go close enough to damage the stone or blast out the mortar.
Power washing is the best and most effective way to clean masonry.

Gregorie · Answer

You can pressure washer stonework although if the mortar joints are weak in places it could blow them out which would mean you would need to re-point places

Chris · Answer

We have pressure washed stonework for years, care must be taken if the stone face is laminating or the lime mortar joints are perished, try to concentrate on the stone face.
No problems.

Joey · Answer

Very dependent on the machine being used. We have a DOFF machine which has a very high temperature. Using a high temperature and lower pressure works well when cleaning more delicate projects.

Chris · Answer

Yes but if pointing loose you could remove this also . But its not a problem

Mark · Answer

yes if its not a soft stone like sandstone, keep the pressure quite low to start off, if you are only washing moss and algea it should be ok but if your trying to remove carbon deposits or old stone you will need to use acid to break it down, or use someone experienced in stone cleaning, hope this helps

Jordan · Answer

Hi, I would recommend soft cleaning with the right treatment applied first.

Ritchie · Answer

It depends on what is needing cleaned off, paint, carbon etc. A DOFF system is the preferred method of cleaning sandstone.

Pressure washing stonework

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