FOAMULAR® 400 High Compressive Strength Rigid Foam Insulation

ASTM C578 Type VI, 40 psi, 1.8 pcf density

Foamular 400

Owens Corning™ FOAMULAR® 400, 600 and 1000 are high strength extruded polystyrene (XPS) insulation products designed for use in engineered applications requiring additional load-bearing capability such as under slab, concrete fl oors, foundations, roadways and rail beds, plaza and parking decks and cold storage installations.

The unique closed-cell structure of FOAMULAR XPS helps to make it highly resistant to moisture, retaining its excellent R-value year after year—even following prolonged exposure to moisture and freeze/thaw cycling.

Owens Corning’s FOAMULAR® extruded polystyrene insulation is an ENERGY STAR® qualified product.

Green Approved by the National Association of Home Builders.


Product Data/Submittal Sheet

Technical Bulletins

Guide Specifications



CSCS Certification(2) NAHB Research Center Green Approved(2) Recycle Content Certification(3) UL Certification for Foamular(3)
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Thickness Width / Length Edge Type
 1", 2", 3"    24" x 96"    Square
 2", 3"  48" x 96"    Square

Other sizes/edge configurations may be available with minimum order.

We recommend FOAMULAR® 400 High Compressive Strength Rigid Foam Insulation for the following applications:

Product Overview