[Material] Polystyrene–Expanded (EPS) Foam Insulation [Pros] * No HCFCs * Recyclable * Typically no indoor air quality effects [Cons] * Made from petrochemicals * Contains highly toxic HBCD brominated flame retardant and other toxins [Application Tips] 
Foam insulation boards. Appropriate for larger projects or new construction in areas with low to no moisture. Best for interior basement walls, beneath siding, and attic ceilings; can be used below grade if coated with foil or plastic.