Just bought a house in Kansas, and the shed out back looks to be homemade, with an asphalt roof, but not shingles.
Both sides show evidence of water rot where the edge of the asphalt doesn’t extend far enough over the wood of the roof to keep water from running underneath.
Can I just tack on some metal or vinyl flashing to direct water a little away from the edge, to prevent further rot? Or is there a better solution an amateur can swing?