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slate removal

Posted by deecee on November 6th, 2002 02:07 AM
In reply to Slate hearth removal by Beverlee Guild on November 4th, 2002 05:40 PM [Go to top of thread]

The slate should be set in a mortar substrate that would have definitely less mechanical strength than the underlying structural concrete. Possibly some form of mastic was used to set the slate, but not likely. In any event, if you can get a chisel under the slate, any pressure applied will tend to pop the slate up as opposed to damaging the concrete. You can get your initial access to the adhesive layer by scraping grout out between sections of the slate and prying a section up with a crowbar...this will either cause the whole section to pop up or a piece of it to break out, allowing access. As you are able to get under the sections with a long flat masonry chisel, you can pop pieces and sections up, and then you can scrape and sculpt the remaining mortar off the concrete underfloor. Use safety glasses, gloves, a masonry chisel and a hammer meant for chiseling, not a claw hammer. I think you will be surprised at how easily the slate comes up. Luck, Kizmet

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