This method is ideal if you want a smooth, right-angled edge, especially for visible edges such as on steps or capping stones. The technique leaves a naturally unprocessed edge, which is unique to Oppdal slate and can be achieved by chiseling.
What you'll need:
Score a 1-2 mm deep groove using a scriber or similar tool.
Mark the back side of the slate, aligning with where the groove is, and make a clear marking.
Place something under the short end of the slate (like the scriber or a plank) to create tension in the slab. Ensure it is stable. Tap along the marking on the back of the slate with a set chisel until the slate splits.
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