How strong is the Oriented Strand Board (OSB) used in SIPs?
OSB has come a long way since it was first introduced. The OSB used in the manufacture of SIPs is quite different from a lot of the material used for wall and/or roof sheathing because the wood fibers are oriented in a way that gives the board more than adequate strength for satisfactory performance . The strength and integrity of the OSB is fully tested and documented by the manufacturer and other agencies.