WRB or metal flashing for vertical wall-t0-wall connections (using ZIP R6)

My addition project, being a porch-to-room conversion, involves negotiating the transitions between new and old, new construction and the existing house.  Where the room’s new walls (will) meet the house,… My addition project, being a porch-to-room conversion, involves negotiating the transitions between new and old, new construction and the existing house.  Where the room’s new walls (will) meet the house,…Read MoreGreenBuildingAdvisor