I'm trying to replace a single cracked asbestos siding shingle with a new fiber cement shingle. But it seems like the way the old shingles were installed might necessitate temporarily removing all the shingles above the cracked one. I'm hoping someone can suggest a workaround whereby I don't have to fuss with a bunch of additional shingles besides the cracked one.
Before starting out, I watched a video addressing a similar 1-for-1 replacement that made it look pretty easy. Just remove the nails from the existing shingle (being careful not to break it or adjacent shingles), slide it out, slide the new one in, and nail it in place.
So I went and removed the nails through the cracked shingle. But it wouldn't come free, even after removing a few nails from the overhanging shingles to allow for more wiggle room.
The lower left part of the cracked shingle was barely connected at this point, and so I gently snapped it off to get it out of the way. This revealed a lath cant strip installed overlaying the head of the shingle below, i.e. nailed through the top of the shingle below. From a little further investigation, these cant strips appear to be installed across every row of shingles. I'm familiar with these being placed at the very bottom of the siding, but not along every row.
So now it seems like to remove the one cracked shingle, I'd need to remove the cant strip overlaying its head. But to get at that strip, I'd need to remove the shingles above the cracked one. But to remove those shingles, I'd need to get at their cant strips, etc. The shingle I'm trying to replace is in the second lowest row of seven, so I'd potentially be looking at taking down around 20 shingles.
Any ideas for how to do this more efficiently?