Insulating panels in expanded polystyrene (EPS), with improbe lambda, obtained from block, closed-cell, flame retardant (Euroclass E). The Ecosilver panels are produced according to EN 13163 with CE marking. The excellent versatility and easy handling are complimented by the advantages of a good sintering and the intrinsic characteristics of the product: high insulating power maintained over time; excellent mechanical performance; permeability to water vapor combined with an extremely low water absorption; impregnability by molds and bacteria; lightweight and economical but, above all, respecting the environment because it is eco-friendly.