Technical Specifications

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EXTRUDED POLYSTYRENE (XPS) RIGID FOAM INSULATION

Owens Corning

FOAMULAR

250 Extruded Polystyrene (XPS) Insulation

is a closed cell, moisture-resistant rigid foam board well suited to meet the

needs for a wide variety of building applications

. FOAMULAR

250 XPS

insulation is great for above and below grade residential and commercial

applications such as perimeter/foundation, cavity wall, precast concrete,

under slab and other application.

Features

Applications

• FOAMULAR

XPS insulation is great for below grade

applications. It is resistant to degradation from the

components of common soils and will retain its insulating

performance characteristics even after prolonged

exposure to moisture

• FOAMULAR

XPS provides continuous insulation

over wood or steel stud framing, 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

XPS insulates perimeter and foundations,

or directly beneath the concrete slab to complement the

insulating sheathing envelope around the building framing

• FOAMULAR

XPS insulation provides a weather resistant

barrier (when joints are sealed) to enhance the building’s

resistance to air and moisture penetration

Standards, Codes Compliance

• Meets ASTM C578 Type IV

• UL Classication Certicate U-197

• Code Evaluation Report UL ER8811-01

• ASTM E119 Fire Resistance Rated Wall Assemblies

• Meets California Quality Standards; HUD UM #71a

• Compliance verication by RADCO (AA-650)

FOAMULAR

250

RIDGID FOAM

INSULATION

Data Sheet | FOAMULAR

250 | December 2019

1. Not for use in at or low slope roong. For low slope roong applications, use

FOAMULAR

THERMAPINK

Extruded Polystyrene (XPS) Rigid Foam Insulation.

2. Visit www.owenscorning.com for more details

SUPERIOR

MOISTURE

RESISTANCE

EASY TO CUT,

FORM, & FIT

DURABLE

Physical Properties

PROPERTY TEST METHOD

VALUE

Thermal Resistance

, R-Value, hr•ft

•°F/Btu (RSI, °C•m2/W)

@ 75°F (24°C) mean temperature

ASTM C518

5.0 (0.88)

@ 40°F (4.4°C) mean temperature 5.4 (0.95)

@ 25°F (-3.9°C) mean temperature 5.6 (0.99)

Long Term Thermal Resistance,

LTTR-Value

, minimum hr•ft

•°F/Btu (RSI, °C•m

/W)

@ 75°F (24°C) mean temperature

CAN/ ULC

S770-03

5.0 (0.88)

Compressive Strength

, minimum psi (kPa) ASTM D1621 25 (172)

Flexural Strength

, minimum psi (kPa) ASTM C203 50 (345)

Water Absorption

, maximum % by volume ASTM C272 0.3

Water Vapor Permeance

, maximum perm (ng/Pa•s•m

) ASTM E96 1.5 (86)

Dimensional Stability, maximum % linear change ASTM D2126 2.0

Flame Spread

8, 9

ASTM E84 10

Smoke Developed

8, 9

ASTM E84 175

Oxygen Index

, minimum % by volume ASTM D2863 24

Service Temperature, maximum °F (°C) - 165 (74)

Linear Coecient of Thermal Expansion, in/in/ºF (m/m/°C) ASTM E228 3.5 x 10

-5

(6.3 x 10

-5

)

1. Properties shown are representative values for 1” thick material, unless otherwise specied.

2. Modied as required to meet ASTM C578.

3. R means the resistance to heat  ow; 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. The U.S. FTC requires the R-value of home insulation

to be measured at 75 degrees F mean temperature. R-value claims should always be

compare at the same Mean Temperature. 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, 25ºF, 40ºF and 75ºF, and from three 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.

4. Values at yield or 10% deection, whichever occurs rst.

5. Value at yield or 5%, whichever occurs rst.

6. Data ranges from 0.00 to value shown due to the level of precision of the test method.

7. Water vapor permeance decreases as thickness increases.

8. These laboratory tests are not intended to describe the hazards presented by this material

under actual re conditions.

9. Data from Underwriters Laboratories Inc.

classied. See Classication Certicate U-197.

Summary of content (2 pages)

PAGE 1
FOAMULAR 250 RIDGID FOAM INSULATION ® EXTRUDED POLYSTYRENE (XPS) RIGID FOAM INSULATION Owens Corning® FOAMULAR® 250 Extruded Polystyrene (XPS) Insulation is a closed cell, moisture-resistant rigid foam board well suited to meet the needs for a wide variety of building applications1. FOAMULAR® 250 XPS insulation is great for above and below grade residential and commercial applications such as perimeter/foundation, cavity wall, precast concrete, under slab and other application.
PAGE 2
Technical Information • FOAMULAR® 250 XPS insulation is a nonstructural material and must be installed on framing which is independently braced and structurally adequate to meet required construction and service loading conditions. • FOAMULAR® 250 XPS insulation can be exposed to the exterior during normal construction cycles. During that time some fading of color may begin due to UV exposure, and, if exposed for extended periods of time, some degradation or “dusting” of the polystyrene surface may begin.