Roof

The Roof item group includes:
 * Acacia Stairs
 * Oak Stairs
 * Birch Stairs
 * Jungle Stairs
 * Spruce Stairs
 * Dark Oak Stairs
 * Brick Stairs
 * Cobblestone Stairs
 * Smooth Sandstone
 * Smooth Red Sandstone
 * Stone Bricks
 * Quartz Slab
 * Cobblestone Slab
 * Quartz Stairs
 * Sandstone Stairs
 * Red Sandstone Stairs
 * Dark Prismarine Stairs
 * Prismarine Brick Stairs
 * Purpur Stairs
 * Stone Brick Stairs
 * Oak Slab
 * Birch Slab
 * Spruce Slab
 * Jungle Slab
 * Acacia Slab
 * Dark Oak Slab
 * End Stone Brick Slab
 * End Stone Brick Stairs