The term "crumble and case" is just that -crumbling the substrate into smaller, more manageable pieces, and casing the pieces by laying a casing layer over the crumbled substrate.
The term "crumble and case" is just that -crumbling the substrate into smaller, more manageable pieces, and casing the pieces by laying a casing layer over the crumbled substrate. Read more in the Casing
101.
