I'm not fully conversant with the renovation filter as I don't really use it.
But the problem you have is the original brick, airspace, sheathing, stud, gwb wall is one element so you will need to mark that entire wall as 'demo' and then replace with a new gwb, stud, gwb wall.
Otherwise you will need to split the existing wall into two separate walls side by side which won't help you in the placement of doors and windows as they will belong to only one of the walls - the other will need empty openings placed in it.
Barry.
One of the forum moderators.
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