is it possible to use tile backer boards on masonry?

[finest1]

hi all

i was fixing a leak in my loft shower room. the photos show after i had removed the plaster off the walls. on the edging photo i've measured 20mm from brick to shower tray. on the shower facing side i've measured 13mm. tile is 7mm thickness. i was wondering, rather than pack it out with cement mix, could i use those water resistant backing boards instead? or even a bit of cement mix and then backing board?

thanks in advance

 

[king of pipes]

6mm will do it in my view where its low build out with just tile adhesive leave to set then fit tile any deeper use the backer board . Kop

 

[finest1]

hi all,

i hope all is well. regarding above, i'm finally going to complete this job. i have removed all the old adhesive back to brick work. i was wondering, do i need SBR on the brick work? i'm planning to use this tile adhesive, im not sure if it already has SBR or equivalent pre-mixed. can you please advise?

Tile adhesive link

thanks