"Phil L" wrote in message
k...
..

Does the use of a pressure hose take the surface off the slabs and
eventually damage them beyond use?

No, they are concrete and unless they are already damaged in some way,
water is not going to have any effect on them, well not in your lifetime
anyway, unless you plan on outliving the Galapagos Tortoise on todays
news.

I have eroded concrete from a path ...oopsy :-(, so I dont see why you
couldnt erode concrete slabs either, it just depends what sort they are, and
how powerful the washer is. Some of the cheaper slabs are pretty soft.

--
Tumbleweed

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