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XPS Insulation FOAMULAR® 250

EXTRUDED POLYSTYRENE (XPS) RIGID FOAM INSULATION

Owens Corning FOAMULAR 250 Extruded Polystyrene (XPS) Rigid Foam Insulation is a closed cell, moisture-resistant rigid foam board well suited to meet the needs for a wide variety of residential and commercial construction applications.

Download Product Data Sheet pdf | 399 KB

Owens Corning FOAMULAR 250 Extruded Polystyrene (XPS) Rigid Foam Insulation is a closed cell, moisture-resistant rigid foam board well suited to meet the needs for a wide variety of residential and commercial construction applications.

Specifications and Literature

Product Features

Moisture Management

Exceptional moisture resistance

Durability

Excellent long-term stable insulating performance at R-5 per inch

Thermal Comfort

Certifications

Resources

Technical Information

Property Test Method2 Value
Thermal Resistance3, R-Value (180 day) minimum,
hr·ft2·°F/Btu (RSI, °C·m2/W)
@ 75°F (24°C) mean temperature
ASTM C518
¾" Thickness 4.0 (0.70)
1" Thickness 5.0 (0.88)
1½" Thickness 7.5 (1.32)
2" Thickness 10 (1.76)
2½" Thickness 12.5 (2.20)
3" Thickness 15 (2.64)
4" Thickness 20 (3.52)
@ 40°F (4.4°C) mean temperature
¾" Thickness 4.3 (0.76)
1" Thickness 5.4 (0.95)
1½" Thickness 8.1 (1.43)
2" Thickness 10.8 (1.90)
2½" Thickness 13.5 (2.38)
3" Thickness 16.2 (2.85)
4" Thickness 21.6 (3.80)
Long Term Thermal Resistance, LTTR-Value3, minimum
hr·ft2·°F/Btu (RSI, °C·2/W)
@ 75°F (24°C) mean temperature
CAN/ULC S770-03
¾" Thickness N/A
1" Thickness 5.0 (0.88)
1½" Thickness 7.8 (1.37)
2" Thickness 10.6 (1.87)
2½" Thickness 13.4 (2.36)
3" Thickness 16.2 (2.85)
4" Thickness 22.0 (3.87)
Compressive Strength4, minimum psi (kPa) ASTM D1621 25 (172)
Flexural Strength5, minimum psi (kPa) ASTM C203 75 (517)
Water Absorption6, maximum % by volume ASTM C272 0.10
Water Vapor Permeance7, maximum perm (ng/Pa·s·m2) ASTM E96 1.5 (86)
Dimensional Stability, maximum % linear change ASTM D2126 2.0
Flame Spread8, 9 ASTM E84 5
Smoke Developed8, 9, 10 ASTM E84 45-175
Oxygen Index8, minimum % by volume ASTM D2863 24
Service Temperature, maximum °F (°C) 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)

<ol> <li>Properties shown are representative values for 1" thick material, unless otherwise specified.</li> <li>Modified as required to meet ASTM C578</li> <li>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, 40ºF and 75ºF, and from two aging (conditioning) techniques, 180 day realtime 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 75ºF mean temperature is commonly used to compare products and is the value printed on the product.</li> <li>Values at yield or 10% deflection, whichever occurs first.</li> <li>Value at yield or 5%, whichever occurs first.</li> <li>Data ranges from 0.00 to value shown due to the level of precision of the test method.</li> <li>Water vapor permeance decreases as thickness increases.</li> <li>These laboratory tests are not intended to describe the hazards presented by this material under actual fire conditions.</li> <li>Data from Underwriters Laboratories Inc.® classified. See Classification Certificate U-197.</li> <li>ASTM E84 is thickness-dependent, therefore a range of values is given.</li> </ol>

Applicable Standards

  • SCS Recycled Content - Average 20%
  • Energy Star
  • UL Greenguard EPD
  • NGBS Green Certified

Applications

Steel Framed

FOAMULAR 250 Extruded Polystyrene (XPS) provides continuous insulation over steel stud framing.

Concrete Masonry Unit

FOAMULAR 250 Extruded Polystyrene (XPS) provides continuous insulation in insulated concrete sandwich panel walls, in masonry unit cavity walls, or when used with non-penetrating, surface mounted furring systems over masonry or concrete walls. FOAMULAR 250 retards the transmission of water vapor and moisture in masonry walls.

CONTACT US

Even though we’re a global company, we’re always ready to answer your questions. Call to speak with an Owens Corning representative so you can start your project right away.

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