Instant Roof Pro — Sketchup Plugin !free!
: Adjust parameters like pitch/slope , overhang , fascia height , and soffit size even after the roof is generated.
Cutting a hole in a roof for a dormer is painful. This plugin includes a "Dormer Cutter" tool. You draw a box where the dormer goes, and the plugin trims the main roof, adds the dormer roof, and welds the textures seamlessly. Instant Roof Pro Sketchup Plugin