Advice re cracking wall and floor tiles

[NZ_Tiler]

Floor crack looks like a problem with the substrate, this crack most likely follows a joint where two hardiebacker boards meet. How far away from the wall is it? Does the floor flex when you walk over it? Or is it solid?

 

[Mct_124]

Floor crack looks like a problem with the substrate, this crack most likely follows a joint where two hardiebacker boards meet. How far away from the wall is it? Does the floor flex when you walk over it? Or is it solid?

Hi the cracks start at the wall and at door entrance. I don't feel flex. The floor underneath is floorboards. Tiler told me at time all he needed to do was screw the floorbosrds down and no need for backer board. I guess this was incorrect and I assume floorboards flexing resulting in tile cracks. I guess im going to have to rip it all up. I'm trying to think of an easy solution as really it will be a nightmare to take out kitchen and re tile. Am considering amtico vinyl tiles. Does anyone know if u can put this over the existing tiled floor that is cracking. To now re tile using backer board will mean raising doors taking out whole of kitchen. So am looking for an easy alternative that will look good and not be such a nightmare . Thank you advance for your help claire

 

[bugs183]

Thats classic poor surface prep.
Cement board etc should have been used, but more often than not it doesn't get done, guys just tile straight to the floor and these cracks occur.
You can't really rectify this without lifting the floor, the timberwork needs to be checked for strength and 'bounce', re boarding, which will add about 15mm to the floor, which in most cases won't effect the kitchen too much, just plain down the kick boards, plain the bottom of the doors and get a cabinet maker to make a hardwood threshold strip for the door.
It's a shame you will have to do this, but the problem should be sortable.