House has a standing seam metal roof with unexposed fasteners. 4 feet down from the peak (just one ridgeline on a rectangle house with a shallow pitch roof, roughly 30 years old) there is a chimney I will be removing to below the roof line and there will be a roughly 3'x6' opening leftover. Previous owners left me one 25' length of roofing panel and I'm hoping I can somehow cut it into pieces to fill in the hole once I put framing into it. Sounds like these roofs are crimped together so I'm doubting I'll be able to somehow slide the replacement piece under the old ones. Is there a way to fill in this hole in the roof that won't leak, without removing the whole roof? I don't care much about how it looks.
This is similar to Bringing unused chimney down below roof line? with the difference being that my chimney is not at the peak, though it is still surrounded by the roof.