Surface flatness comes first
A tile can be manufactured within its allowed tolerance and still be difficult to install over an uneven slab or wall. The surface should be checked before layout so high areas, low areas, cracks, transitions, and required preparation can be identified.
Layout controls the visible result
Room dimensions, focal lines, doorways, cabinets, drains, outside corners, and adjoining floors influence where full and cut pieces land. Tile caliber, shade, directional markings, and any natural bow should also be reviewed before setting begins.
Mortar coverage and handling
Tile size, back pattern, substrate, setting material, trowel selection, and application method affect contact between the tile and surface. Mortar should be used within its working time, and coverage should be checked during installation rather than assumed from the trowel size alone.
Edges, joints, and movement
Consistent grout joints do not remove natural tile variation. Edge alignment depends on the tile, pattern, surface, and joint width. Perimeters, changes of plane, existing movement joints, and larger tile fields also need movement accommodation appropriate to the assembly.
Questions to settle before work
- Has the actual tile been inspected for size, shade, bow, and finish?
- Does the surface need flattening or crack treatment?
- Where will cuts and transitions be most visible?
- What grout joint and movement plan fits the material and space?