Which type of insulation do SIPs use?

Our Sips Eco Panels use premium carbon treated EPS (Expanded Polystyrene) as the insulant. EPS achieves a BRE Green Guide rating of A+ (taking into account whole lifecycle impact) and is widely used throughout the construction industry as an insulator. EPS is 98% air, fully recyclable and can give you very low U-Values in your project.