Another newbie roof

[Chordmeister]

Having spent a lot of time searching through threads and just as long experimenting, I'm flummoxed....

I'm trying to create a simple duo-pitched roof with an apex at the centre of the house, BUT one side of the apex the roof will pitch to the ground level of the attic, the other side will be a much shallower pitch to a full width dormer across the house.

I attach a picture to illustrate - what you see is the side of the house (the gable wall) with the standard pitch one side, and the shallow pitch to the dormer wall the other.

I'm using v7 suite (not pro) - surely this is possible?

Thanks in advance.