I am building a garage and using trusses. I plan on using a 12" overhang of my decking on the gable ends. How do I attach the fascia? Do I need to make some type of floating rafter at the top, and if so, how do I do that? I am planning on running 2x4's connected to the ends of the rafters extended out 12" on each side with the fascia over that. I just am not sure how to attach the fascia at the peak.
It sounds like your laddering the gables( 2x4 2' o/c up to the peak). If so make sure you have one on each side of the peak you attach a 2x4 barge board to the 2x4 latters and then attach the facia to that. This set up also gives you a return for your soffitt work.