https://tegoroofingsupply.com/shop/roof-patch/?srsltid=AfmBOoqBBDPfQQuEWMQ-KCK16Ehk31r5oWzha91qg-GbeuanL_RkB7wf
The 8 Roof Corner Patch is a must-have for anyone tackling roof repair tasks. Perfect for contractors and homeowners alike, this tool is designed to handle ...

https://www.youtube.com/watch?v=FYy4zKyWib0
How To Replace Rotten Fascia Corners! "Complete Guide ... ROOF FASCIA BOARD --- How to Repair or Replace Rotten Wood in a Few Easy Steps.

https://www.reddit.com/r/Roofing/comments/17h3lkb/how_to_repair_odd_corner/
Peel up all of the black shingles and a bit more, find out the status of sheeting underneath. Replace anything rotten, new sheeting, ice and water everywhere, ...