Extrusion Matters: XPS vs. EPS

Course Description Extruded polystyrene (XPS) and expanded polystyrene (EPS) are both types of rigid foam plastic insulation; their different manufacturing processes produce wide-ranging performance attributes, especially in water absorption and R-value. This course discusses the negative impact of water absorption on R-value and structural integrity; explains why codes and standards are sometimes specific in requiring XPS in applications where prolonged exposure to water occurs; and concludes with a look at best specification practices for accurate bids.

Internal Course Code AEC883-01:1

Course Duration 1 hour(s)

Format PDF

HSW: Yes

Point of Contact Name: Tiffany Coppock, AIA, NCARB, CDT, LEED AP, ASTM, RCI, EDAC

Point of Contact Email: Tiffany.Coppock@owenscorning.com

Architectural Support - Commercial Insulation

Eastern U.S.

Susan Raneri

Susan.Raneri@owenscorning.com (617) 999-2737

Drew Clausen
Central U.S.


Central U.S.

Drew Clausen


Western U.S.

Saboura Rokhsari

Saboura.Rokhsari@owenscorning.com (281) 432-8321