Starting Roof Rafters November 10, 2016 by DickmanLegacyLodge Fifty one engineered TGI’s will be set for the main roof. TGI’s provide stability and dimensional consistency that cannot be found in 2 x 12 rafters. The result will be a smooth (not wavy) roof. Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading... Related