Offset Mesh fail?

Coming from this thread.

So after many fails with Offset Breps, some suggest to try with Offset Mesh.
And here’s the result:
offset mesh.gh (96.9 KB)


Any ideas why it can’t be a clean offset but a strange triangle corner left?

What’s the result used for?

building interior finishing layer construct

Ok, so this will have to be split into plywood panels or something similar?