Steven:
Here are two options. First select the over-framed roof, right-click and select Connect > Trim Elements to Roof/Shell, click the main roof, and then click on the part of the over-framed roof you want to remain. The main roof will cut away the over-framed roof. Then:
1. For the main roof, Roof Settings > Model > Trimming Body >
Pivot Lines down (rather than Contours down) will trim the over-framed roof at the Pivot Line, not the edge. This will work if the Pivot Line is where the over-framed roof needs to end.
2. If adjusting the Pivot Line creates problems elsewhere in the model, then add another over-framed roof piece under the main roof, select the 2 over-framed roofs, right-click > Connect > Merge Elements.
David