Owens Corning

FOAMULAR® NGX® 404/604

Owens Corning® FOAMULAR® NGX® 404/604 Extruded Polystyrene (XPS) Rigid Foam Insulations are specially designed for use in Protected Roof Membrane Assemblies (PRMA), where the insulation is placed directly over the membrane.

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Specifications & Literature

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Owens Corning® Enclosure Solutions offers one of the largest portfolios of commercial insulation products for walls, roofs, and below-grade foundations. Engineered with Owens Corning technical expertise and supported by Building Science, Owens Corning® Enclosure Solutions deliver buildings that perform without compromising design.

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Technical Information

PROPERTY

TEST METHOD4

404

604

Thermal Resistance,5 R-Value (180 day) minimum, hr•ft2•°F/Btu (RSI, °C•m2/W)

ASTM C518  
@ 75°F (24°C) mean temperature 10 (1.76)10 (1.76)
@ 40°F (4.4°C) mean temperature 10.8 (1.90)10.8 (1.90)
@ 25°F (-3.9°C) mean temperature 11.2 (1.97)11.2 (1.97)

Long Term Thermal Resistance, LTTR-Value,5 minimum hr•ft2•°F/Btu (RSI, °C•m2/W)

CAN/ULC S770-03

  
@ 75°F (24°C) mean temperature 10.6 (1.87)10.6 (1.87)

Compressive Strength,6 minimum psi (kPa)

ASTM D162140 (276)60 (414)

Flexural Strength,7 minimum psi (kPa)

ASTM C20390 (621)120 (828)

Water Absorption,8 maximum % by volume

ASTM C2720.30.3

Water Vapor Permeance,9 maximum perm
(ng/Pa•s•m2)

ASTM E961.1 (63)1.1 (63)

Dimensional Stability,
maximum % linear change

ASTM D21262.02.0

Flame Spread10, 11

ASTM E841010

Smoke Developed10, 11, 12

ASTM E84175175

Oxygen Index,10 minimum % by volume

ASTM D28632424

Service Temperature, maximum °F (°C)

—165 (74)165 (74)

Linear Coefficient of Thermal Expansion,
in/in/°F (m/m/°C)

ASTM E228

3.5 x 10-5
(6.3 x 10-5)

 
3 Properties shown are representative values for core 2" thick material, unless otherwise specified.
4 Modified as required to meet ASTM C578.
5 R means the resistance to heat flow; the higher the value, the greater the insulation power. This insulation must be installed properly to get the marked R-value. Follow the manufacturer’s instructions carefully. If a manufacturer’s fact sheet is not provided with the material shipment, request this and review it carefully. R-values vary depending on many factors, including the mean temperature at which the test is conducted and the age of the sample at the time of testing.
Because rigid foam plastic insulation products are not all aged in accordance with the same standards, it is useful to publish comparison R-value data. The R-value for FOAMULAR® XPS Insulation is provided from testing at two mean temperatures, 40°F and 75°F, and from two aging (conditioning) techniques, 180-day real-time aged (as mandated by ASTM C578) and a method of accelerated aging sometimes called “Long-Term Thermal Resistance” (LTTR) per CAN/ULC S770-03. The R-value at 180-day real-time age and 75°F mean temperature is commonly used to compare products and is the value printed on the product.
6 Values at yield or 10% deflection, whichever occurs first.
7 Value at yield or 5%, whichever occurs first.
8 Data ranges from 0.00 to value shown due to the level of precision of the test method.
9 Water vapor permeance decreases as thickness increases.
10 These laboratory tests are not intended to describe the hazards presented by this material under actual fire conditions.
11 Data from Underwriters Laboratories Inc.® classified. See Classification Certificate U-197.
12 ASTM E84 is thickness-dependent, therefore a range of values is given.

Applications

  • Roofs
  • Roofs > Flat
  • Roofs > Pitched / Curved

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