All of our information is sourced from manufacturer data.

FOAMULAR NGX 400, 600, 1000

Owens Corning

FOAMULAR NGX 400, 600, 1000

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Board Insulation Board Insulation

Foam Board Foam Board

XPS (Extruded Polystyrene) XPS (Extruded Polystyrene)

Exterior Subterranean Floor, Floor, Sloped Ceiling Exterior Subterranean Floor, Floor, Sloped Ceiling

Unfinished Floor Unfinished Floor

Design Options

Product Description

FOAMULAR NGX 400, 600, 1000 are high strength Extruded Polystyrene (XPS) Insulation products designed for use in engineered applications requiring additional loadbearing capability such as under slab, concrete floors, foundations, roadways and rail beds, plaza and parking decks and cold storage installations. It can also be used in tapered insulation systems when higher compressive strength is needed.
It contains the additional benefit of being manufactured with a blowing agent formulation that delivers a 90% reduction to Global Warming Potential (100 year), including the complete elimination of HFC 134a.



Standard Sizes: 2' 0", 4' 0"


Standard Sizes: 8' 0"


Standard Sizes: 1", 1-1/2", 2", 3", 4"

Manufacturer Design Notes

FOAMULAR NGX XPS Insulation is non-structural materials and must be installed on framing which is independently braced and structurally adequate to meet required construction and service loading conditions.

Performance Data

R-Value Per Inch

Measure of the thermal resistance of the product per inch of thickness, imperial units.

°F·ft^2·h / BTU / inch


NRC Value

The Noise Reduction Coefficient values of this product

Fire Resistance

Amount of time the product can withstand fire

Water Vapor Transmission

An imperial perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury

perm (imperial)


Smoke Development

As defined by the ASTM E84 testing standard


Minimum Recycled

The minimum amount of the product's input materials that come from recycled sources



Linear Shrinkage

The percent that a product shrinks, usually in response to heat.



Flame Spread

As defined by the ASTM E84 testing standard


Compressive Strength


40, 60, 100