Builders are substituting insulating foam board for osb. I have them providing CS-WSP at the corners and then CS-PF at garages. However, they are not using a nailing pattern that seems sufficient. Plus studs are on 24" centers. Without any other bracing, is this up to code? Since it is not officially structural, can I require a nailing pattern similar to that required for fiberboard, 3" edge and 6" field?