Tiling Floor advice required

[DHTiling]

Wrong forum this thread.. 🙂

 

[Ian]

Wrong forum this thread.. 🙂

Sorted

 

[PMM9BRO]

i have just started installing the backer board whilst I can't see any obvious movement I can hear a some creaking, I have screwed the chip board wherever I can, my questions are;,

will the single part flexi adhesive help if there is a bit of movement?

should I go for ply instead?

should I use the floor adhesive to bed down the backer board?

thanks