The roof and some sheathing was replaced a couple of years ago.
Shingles were in great shape, except for the raised areas under the shingles in a few spots as viewed from the exterior.

I think while doing the repairs, they noticed some areas that were not level and tried to fill in the gaps to level out some wavy areas with the shim.

But thats just a guess.

__________________
"I reject your reality and substitute my own!" - A. S.

Absolute Home Inspections, LLC