Clean the concrete surface thoroughly
Remove dust, grease, paint, and debris
Check the slab for cracks, moisture, and uneven areas
Repair cracks and fill low spots
Make sure the floor is level and dry
Mark the center lines of the room
Dry-lay tiles to plan the layout
Mix tile adhesive or thin-set mortar
Apply adhesive with a notched trowel
Set the first tile at the center or layout line
Press each tile firmly into place
Use tile spacers for even grout joints
Cut edge tiles as needed with a tile cutter
Check alignment and level as you go
Let the adhesive cure fully
Remove spacers after curing
Mix grout and fill the joints
Wipe off excess grout with a damp sponge
Allow grout to cure
Apply sealant if required
Clean the finished tile surface