Hi Ben,
I installed ship-lap log siding over my sips pannels. They look great and I have had no problems with loose boards.
I used house wrap instead of felt. Also used 3 1/4" galvanized"ring shank" nails to attach. Insured that I nailed to each 2x6 splines and also nailed into just OSB every 16" to 24".
Did the same in 3 rooms inside (no house wrap inside). If you use ringshank nails you should have no problems. Galvanized nails outside prevent rust lines .
Any questions, please feel free to contact me @
[email protected] and I'll give you my phone #.
Lee