My OSB sheathing on the exterior side of my exterior walls has many a gaps varrying from 1/8″ to 1/4″ as the proper installation instructions require the sheathing to be gapped with a nail to allow expansion due to humidity changes.

So…I’m looking at these gaps (some rather large) and getting ready to stuff mineral wool in. Should I take any time now to a.) caulk or b.) spray foam these gaps? I have a decent house wrap over the sheathing of course but that doesn’t stop everything.