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Originally Posted by t walgamuth
So you would say some are porous and will stain if not sealed?
I found it incredible that SRJ would compare slate to granite. I have some experience with both materials and the comparison seemed to me like saying a Chevette is the same as a Mercedes.
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I'd agree with you.
[QUOTE=t walgamuth;2367444]Slate you can score and snap, I wouldn't want to try that with granite. I installed some slate on my roof which you could cut with a device much like a paper cutter and punch holes with something much like a hole punch for paper.[/QUOTE}
Likely a Vermont or VA slate, split very thin. That paper cutter device rips through the stone very easily indeed, but you don't see water penetrating through that roof do you?
Quote:
Originally Posted by t walgamuth
I suppose it depends on the quality of slate. The slate available around here, I was led to believe by my professional tile setters, is porous and needs to be sealed to keep it from staining.
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Apple & Oranges. I sell miles of Pennsylvania Blue Stone every year here in MD. A large number of my shoppers think they are buying "slate". They are not. Put PA Bluestone on your kitchen or foyer floor, unsealed, and it will soak up everything you spill on it. Put Vermont slate in the same place, and the only problems you will have with it not being sealed is difficulty keeping the surface clean due to the texture capturing dirt & dust.
Just as many of the materials being marketed as "Granite" are indeed of some other geology that makes them not true granite.