Ok, i'm done pulling my hair out, Need some help. I'm am trying to add a roof over a porch that goes the length of the house/cabin. I want it to start half way up the house/cabin main roof. I've tried everything and i've been getting some pretty wild roofs. Any and all advise would be much appreciated. The main roof is an 8/12 and looking to have the porch a 4/12.