Harbor Foam is a leading manufacturer in the expanded polystyrene (EPS) industry. With over 100 years combined service in manufacturing and supplying EPS to many innovative industries in Michigan, ...

Lightweight and versatile, molded polystyrene foam is a commercial ... Polystyrene Thermal Insulation.” Rigid cellular polystyrene products include both extruded polystyrene and molded ...

Rigid foam is the best insulation for rim joists. We chose 2-in.-thick (R-10) "extruded polystyrene." Don’t use "expanded polystyrene," which is a less effective air and moisture barrier.

Description: FOAMULAR® 404 & 404 RB extruded polystyrene insulations are specially designed for use in Protected Roof Membrane Assemblies (PRMA), where the insulation is placed directly over the ...