To give you a little visual of the state of said dormer BEFORE this project was completed, take a look here:
Two individual roof pans were formed to fit the shape of the roof.
This process incorporates series of folding and seaming to achieve a water tight roof without the need for sealants or solder.
Overall finished copper work on the dormer window:
As always, if you have any questions or comments regarding this method or any details of the work done, please feel free to leave them in the comments!