Polyurethane vs. EPS

Two insulating cores are available for your Cas-Lin SIP panel- Expanded Polystyrene (EPS) or Polyurethane (PUR).

Energy Efficiency: Polyurethane foam is a better insulator and offers the best physical properties of any insulating foam. Polyurethane foam has a stable R-value of R-7 per inch of thickness, versus R-4 for EPS. This means you can achieve a higher R-value with a thinner panel.

Strength: The manufacturing process for EPS and PUR is different. EPS foam core is molded, cut, and then laminated to the skins. Polyurethane foam is injected into panels, adhering to every surface, forming a strong and durable bond which results in a panel that is stronger than an EPS panel. Heat and pressure creates a chemical reaction when polyurethane foam is injected. The foam adheres and bonds to the skins becoming rigid. Polyurethane panels can withstand higher compression, transverse, and racking loads.

Quality: Polyurethane foam has better fire, flame, and smoke characteristics and will not melt.

Cam-Lock: Polyurethane allows the optional use of a cam-lock fastening system, embedded into the foam. This results in a stronger panel connection and saves significant installation time in the field. The use of cam-locks ensures proper alignment and a tight seal between the panels, resulting in a superior building envelope.