What is the R value of 7/16 OSB?
7/16 OSB R-Value = 0.51. 1/2 OSB R-Value = 0.74.Click to see full answer. Also, what is the R value of zip sheathing?ZIP System R-Sheathing provides a combined R-value of 3.6, 6.6, 9.6 or 12.6 on the outside of wall framing in addition to wall cavity insulation. One panel delivers thermal, air, and moisture resistance,