Specification
Product Data Sheet
FOAMULAR
®
Insulating Sheathing
Extruded Polystyrene (XPS) Rigid Foam Insulation
Standards, Codes
Compliance
• Meets ASTM C578 Type X
• UL Classi ed.
A copy of UL
Classi cation
Certi cate U-197
is available at
www.foamular.com
• See ICC-ES Evaluation Report
ESR-1061 at www.icc-es.org
• ASTM E119 Fire Resistance
Rated Wall Assemblies. See
www.foamular.com for details
• Meets California Quality
Standards and HUD UM #71a
• Compliance veri cation by
RADCO (AA-650)
Certi cations and Sustainable
Features of FOAMULAR
®
XPS Insulation
• FOAMULAR
®
XPS Insulation
is reusable and remnants from
manufacturing are recycled back
into new XPS Insulation
• FOAMULAR
®
XPS Insulation
is made with a zero ozone
depletion formula
• Certi ed by Scienti c
Certi cation Systems to contain
a minimum of 20% pre-
consumer recycled polystyrene
• Certi ed to meet indoor air
quality standards under the
stringent GREENGUARD
Certi cation Program and
GREENGUARD Gold
Certi cation Program
Typical Physical Properties
1
FOAMULAR
®
Insulating Sheathing Insulation
Property Test Method
2
Value
Thermal Resistance
3
, R-Value (180 day) minimum,
hr•ft
2
•°F/Btu (RSI, °C•m
2
/W)
@ 75°F (24°C) mean temperature ASTM C518
½ " Thickness
4
3.0 (0.53)
¾ " Thickness 4.0 (0.70)
1" Thickness 5.0 (0.88)
@ 40°F (4.4°C) mean temperature
½ " Thickness
4
3.2 (0.57)
¾ " Thickness 4.3 (0.76)
1" Thickness 5.4 (0.95)
Long Term Thermal Resistance, LTTR-Value
3
hr•ft
2
•°F/Btu (RSI, °C•m
2
/W)
@ 75°F (24°C) mean temperature CAN/ULC S770-03
½ " Thickness
4
N/A
¾ " Thickness N/A
1" Thickness 5.0 (0.88)
Flexural Strength
5
, minimum psi (kPa) ASTM C203
½ " Thickness
4
N/A
¾ " Thickness N/A
1" Thickness 65 (448)
Compressive Strength
6
, minimum psi (kPa) ASTM D1621 15 (103)
Water Absorption
7
, maximum % by volume ASTM C272 0.10
Water Vapor Permeance
8
, maximum perm (ng/Pa•s•m
2
) ASTM E96 0.2 (11.5)
Dimensional Stability, maximum % linear change ASTM D2126 2.0
Flame Spread
9, 10
ASTM E84 5
Smoke Developed
9, 10, 11
ASTM E84 45-175
Oxygen Index
9
, minimum % by volume ASTM D2863 24
Service Temperature, maximum °F (°C) — 165 (74)
Linear Coef 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 core 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. 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 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 75ºF mean temperature is
commonly used to compare products and is the value printed on the product.
4. The ½” is actually a nominal half-inch of 9/16th needed to achieve 3.0 R-value.
5. Value at yield or 5%, whichever occurs rst.
6. Values at yield or 10% de ection, whichever occurs rst.
7. Data ranges from 0.00 to value shown due to the level of precision of the test method.
8. Water vapor permeance decreases as thickness increases.
9. These laboratory tests are not intended to describe the hazards presented by this material under actual re conditions.
10. Data from Underwriters Laboratories Inc.
®
classi ed. See Classi cation Certi cate U-197.
11. ASTM E84 is thickness-dependent, therefore a range of values is given.