Hardibacker onto brick ?

[lonspwi]

I've stripped off all the old lime plaster back to brick from an outside facing wall for a bathroom renovation. I want to use hardibacker straight up against the brick to prepare for the limestone tiles up to ceiling.
How should i prepare the exisitng brick surface and what adhesive should i use to stick the Hardibacker to the brick ? I shall also be using mechanical fixings in addition to the adhesive.

Thanks and Regards

 

[mcluma]

is the wall insulated??

if not, you need to insulate it, you can do the insulatedback plasterboards

 

[lonspwi]

No, the wall is solid brick all the way to the outside, it's an old house - pre cavity wall.
So what is the best method of insulation ? Are you saying stick insulated plasterboard to wall instead of Hardibacker ? Would that take the weight of 10mm limestone tiles ?

Thanks and Regards

 

[mcluma]

In that case i would first batton it out, (vapour barier first, and then insulation -kingspan, then marmox or hardibacker