Preparing a Brick Wall for Tiling

[DIYER44]

Hi, I'm retiling the walls in the pictures which is a shower above a bath - one wall is stripped back to the bare brick and the other is back to the plaster, which is sound.

To prepare the brick wall, I'm thinking of using a 6mm hardie backer - they recommend a grab adhesive but would anyone use a bed of tile adhesive?

With either method does the brick need to be primed?

Or would anyone suggest using a different type of board?

For the plastered wall, can it be tiled straight on to, or should i put a backer board on that too?

The tiles are a 400mm x 250mm ceramic tile

Thanks in advance

 

[pete f]

12 mm hardie for the brick wall 6 mm is for floors must be mechanically fixed not glued or dotted