What tile adhesive to use on Backerboard on wooden floor?

[Sooperman]

Hi im new to tiling, and i was wondering what adhesive to use. I have a kitchen floor to tile 11M2 and there is floor boards down
and on top of that the guy is putting down Hardie backerboards. Waht i want to know is what is the best adhesive to use and grout to have a job well done.
Ps it must be a Bal adhesive as thats what i and the customer want to use. Thanx.

 

[cam_low]

Who exactly are we talking about as you have said you are tiling it but the guys putting hardie down

 

[AMtek]

And how is he putting them down? they should be set into a bed of adhesive then screwed down. What tiles are going down?

 

[Andy Allen]

make sure the floor is deflection free, then i would use bal single part fast flex and bal wide joint grout with GT1 admix..