Box gutter repair?
My 1884 2 1/2 story brick house has a new shingle roof. Slate was torn off in 1995. But the box gutters on all four sides are a problem. Metal, previously lined with rubber about 15 years ago. Rubber has lifted up all along outer edge, and has dirt, mineral, etc underneath. They leak and probably are damaging the wood beneath the metal.
Repair options I've heard of include removing the old rubber (which would be easy. Clean, then repair. But how?
Tar, mesh and more tar? Redo the rubber? Other options?
I also have seen houses where the box gutters were covered over with wood sheeting as an extension of the roof slope, then shingled over. Then a new 5" OG gutter was installed.
It just loses a lot of its "old house" look.
Please advise me. Thanks!