Wood and organic materials
Which is better, OSB or Plywood for Roofs, Walls & Floors?
...permeability between final products is worthy of note. And remember that those are the higher of the estimated perm numbers, and the best case scenario once a weather barrier is on.
Panel thickness will also affect permeability - using the 2 perm variable of 7/16ths OSB sheathing, at 3/4" thickness the permeability dro...