Just finished sheathing my timber frame garage in 12mm osb...was planning to wrap it all in tyvek supro as supplied by local builders merchants but unusually I decided to read to instructions where it says "not to be used with osb or plywood" so have I got the wrong stuff?....merchants website says it is suitable for "most forms of wall construction" Dupont site just says it is only for roofs although they don't say the anything about the osb issue etc??