Floating cement on open wall with studs exposed

So I have demoed my bathroom and it is currently exposed to all the studs. I want to cement float the wall, but am a little confused according to some of the videos I have seen. My question is for prepping prior to floating…before laying AQUABAR “B” TILE UNDERLAYMENT and stapling, should there be anything between that and the studs aside from the insulation? Any steps to doing this would greatly be appreciated.

Use the WEDI board system from Dal Tile. You won’t regret it!! I have used it on many remodels for customers.
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