On Monday, 14 May 2018 14:39:40 UTC+1, Andrew Gabriel wrote:
In article ,
tabbypurr writes:
On Monday, 14 May 2018 06:58:44 UTC+1, pinnerite wrote:

My daughter is moving to a flat that has a cracked ceramic kitchen floor.
She hopes to continue her new 'business' of making and hopefully selling
iced biscuits.

To do that she has to have local authority vetting. She believes without
some kind if treatment the floor would lose her current status of 5 on
Scores on Doors.

Is there any kind of treatment that might solve this problem?

Tile cracks can be solved by any of:
cut the tile out & fit a new one. If you can't find a match use some sort of feature tile
epoxy in the crack
angle grind the crack & grout.

Which the authority accepts I've no clue.

Is this one tile, or lots of them?
Against my better judgement, dad believed a tiler who said tiles
can be laid on floor boards with some special adhesive. They're
all cracked now. They don't move and are still stuck down, but
floor boards were not adequate support.

I prepared a floor for tiling for a friend more recently. I pulled
up the floorboards and laid an 18mm plywood floor in whole sheets.
I didn't do the tiling, but no tiles have cracked on that floor.

they will.