What is the difference between Gauged and Un-gauged?
Gauged is a process whereby tiles are calibrated to maintain consistency in thickness. Gauged slates, for example, will be milled on the bottom of the slate for a consistent subsurface, making the installation process easier. If the slate is gauged and natural cleft on the surface, the thickness will still vary based on the variations in the natural cleft of the surface, but the overall thickness will vary 50% less than un-gauged slate.
