Grout line cracking

[Bradma9]

H all iv recently re tiled the whole of my bathroom floor and wall. Iv now noticed that the grout has started to crack where the floor meets the wall.
I put 6mm no more ply down onto the boards followed by a flexible rapid set adhesive with porcelain tiles.
Does anyone know why this coud be cracking the grout inbetween the tiles is good just on the edge.
many thanks
brad

 

[prceramics]

you are supposed to put Silicon where the floor meets the wall

 

[White Room]

I allways Silicon floor/wall joints, there allways seems to be movement and as you have proven cracking happens...

 

[DHTiling]

Hi.. The floor to wall transition is classed as an expansion joint , hence as above it should be siliconed to allow movement..

 

[Bradma9]

Thank you for your advice, this was my first every attempt hence not knowing something as simple as that!
Thank you