Pros and Cons of EPS and XPS Pros: Recyclable products that assist with LEED points. Won’t support mold or mildew growth. Long-term, stable R-value. Can be placed below grade. Can be utilized for inverted assemblies (over membrane). Cons: Exposure to sun will deteriorate the product. Solvents/solvent-based materials cause irreversible damage. Elevated temperatures (above 250 degrees