DRICORE® Subfloor R+ is a simple do-it-yourself solution to help you create a warm, dry, comfortable basement that is fast and easy to install. Designed with a layer of extruded polystyrene foam (EPS), DRICORE® R+ delivers an R-value of 3.0.The secondary layer of oriented strand board (OSB), provides a solid foundation that can support any type of finished floor and furniture.