Knowing whether to use steel sips or sips with OSB panels depends mainly on the particular project that you are working with. Both give a high level of insulation with a core of EPS (expanded polystyrene) giving a consistent R-value throughout the panel from top to bottom that will not move over time. Both also make the home more airtight and energy-efficient. Making the final decision on steel sips or OSB sips may mean considering the whole construction project and the other complementary materials being used on site. Call Universal Foam Products on 410-498-0000 for further advice on SIPS panels.