https://www.reddit.com/r/pittsburgh/comments/k0kytd/slate_roof_repair/
Comments Section ... I've heard Rick John specializes in slate roofs. Good luck!! ... Western PA Slate Roofing did the EXACT same repair to my home ...

https://www.rickjohn.com/
As Pittsburgh's residential roofing experts, RickJohn Roofing specializes in specialty roofing projects including slate and tile roofing, copper standing seam ...

https://coffeycontracting.com/roofing/
Slate roofs offer a natural look and can be laid out in a variety of colors and patterns. When installed properly, slate roofs require little maintenance and ...