FOAMULAR® NGX® 404RB/604RB Extruded Polystyrene (XPS) Rigid Foam Insulations are specially designed for use in Protected Roof Membrane Assemblies (PRMA), where the insulation is placed over the roof membrane system and below pavers.
XPS Insulation
Extruded Polystyrene (XPS) Rigid Foam Insulation
FOAMULAR® NGX® 404RB/604RB
Extruded Polystyrene (XPS) Rigid Foam InsulationSpecifications & Literature
Data Sheets (1)
Brochures (1)
Technical Documentation (3)
Warranty (1)
Environmental Product Declarations (3)
LEED (2)
Safety Documents
Building Enclosure Solutions
Building Enclosure Solutions
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.
Technical Information
Physical Properties
| Property | Test Method4 | 404 RB | 604 RB |
Thermal Resistance,5 R-Value |
| 9.5 (1.67) | 9.5 (1.67) |
@ 40°F (4.4°C) mean temperature | 10.3 (1.81) | 10.3 (1.81) | |
@ 25°F (-3.9°C) mean temperature | 10.6 (1.87) | 10.6 (1.87) | |
Compressive Strength,6 minimum psi (kPa) | ASTM D1621 | 40 (276) | 60 (414) |
Flexural Strength,7 minimum psi (kPa) | ASTM C203 | 90 (621) | 120 (828) |
Water Absorption,8 maximum % by volume | ASTM C272 | 0.3 | 0.3 |
Water Vapor Permeance,9 maximum perm (ng/Pa•s•m2) | ASTM E96 | 1.1 (63) | 1.1 (63) |
| Dimensional Stability, maximum % linear change | ASTM D2126 | 2.0 | 2.0 |
Flame Spread10, 11 | ASTM E84 | 10 | 10 |
Smoke Developed10, 11, 12 | ASTM E84 | 175 | 175 |
Oxygen Index,10 minimum % by volume | ASTM D2863 | 24 | 24 |
| 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® & FOAMULAR® NGX® XPS Insulation is provided from testing at mean temperatures of: -4°C (25oF), 4.4°C (40°F), and 24°C (75°F) and aging techniques of 180-day real time aged (as mandated by ASTM C578) and accelerated aging “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 (Low Slope)
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