Caulking Guns, Tile Cutters & Sealants

Where in a bathroom tile installation is 100% silicone sealant mandatory instead of cementitious grout?

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 Correct IncorrectAny change in plane (where wall meets floor, or at inside corners between two walls) will move due to building settling and thermal shifts. Rigid grout cracks; flexible 100% silicone accommodates the movement.

Where in a bathroom tile installation is 100% silicone sealant mandatory instead of cementitious grout?

• Inside the toilet tank overflow pipe
• At all plane transitions (wall-to-wall corners and wall-to-tub joints)
• Between the tile face and the towel bar
• Directly under the ceiling exhaust fan