Counter battens and carrying battens wooden facade

I would definitely underline that (this is mainly about when the branches fall out due to drying and you have a hole in it) We used silver fir because Siberian larch was not available branch-free in 5m.

Or in combination with larch, you cannot see any battens:

The idea is that you can see the underlay through the 1 cm gap. So I would also paint the battens where they are visible.