Joining Ditra membrane and Jackoboard

[djkprojects]

Hello guys,

I'm doing a wetroom and will be using Ditra Heat Duo membrane for the UFH. I looked at Kerdi Boards for walls and Kerdi LTS for the shower tray but these are double the price of for example Jackboard so I thought of using that on walls and shower tray instead but my question is how can I tape and seal/tank the jackboard on walls and ditra membrane on the floor ? Schluter recommend Kerdi Coll for their products, Jackboard have their own so it's not really clear which one would work on both, if at all possible.

Also, I haven't yet stripped the wallpaper of the walls and fearing it has hardwall underneath which isn't great for tiling on so my question is what's the best way to fix Kerdi/Jacko to walls using tile adhesive? Would I need to plaster the walls first or apply a primer e.g.: SBR ?

Thanks