ASTM C1136-08

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C1136 – 08
Standard Specification for
Flexible, Low Permeance Vapor Retarders for Thermal
1
Insulation
This standard is issued under the fixed designation C1136; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope C755 Practice for Selection of Water Vapor Retarders for
Thermal Insulation
1.1 This specification covers vapor retarders for thermal
D774/D774M Test Method for Bursting Strength of Paper
insulation, specifically, flexible materials with permeance of
C1258 Test Method for Elevated Temperature and Humid-
0.10 perm or lower and surface burning characteristics of 25
ity Resistance of Vapor Retarders for Insulation
flame spread/50 smoke or lower. These materials are intended
C1263 Test Method forThermal Integrity of FlexibleWater
for use at surface temperatures of−20 to 150°F (−29 to 66°C).
Vapor Retarders
It does not cover mastics or barrier coatings applied in liquid
C1338 Test Method for Determining Fungi Resistance of
form, nor materials intended for use as weather barriers.
Insulation Materials and Facings
1.2 This is a material specification and does not imply that
D828 Test Method for Tensile Properties of Paper and
an installed system using these materials will provide the
Paperboard Using Constant-Rate-of-Elongation Appara-
physical properties specified in Section 6.
3
tus
1.3 This specification provides physical requirements for
D882 Test Method for Tensile Properties of Thin Plastic
vapor retarders. Practice C755 provides assistance in solving
Sheeting
problems related to moisture vapor transmission through ther-
D1204 Test Method for Linear Dimensional Changes of
mal insulation materials.
Nonrigid Thermoplastic Sheeting or Film at Elevated
1.4 The values stated in inch-pound units are to be regarded
Temperature
as standard. The values given in parentheses are mathematical
E84 Test Method for Surface Burning Characteristics of
conversions to SI units that are provided for information only
Building Materials
and are not considered standard.
E96/E96M Test Methods for Water Vapor Transmission of
1.5 The following precautionary caveat pertains to the test
Materials
methods portion only, Section 10, of this specification: This
2.2 TAPPI Standards:
standard does not purport to address all of the safety concerns,
T461 Flame Resistance of Treated Paper and Paperboard
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
3. Terminology
practices and determine the applicability of regulatory limita-
3.1 Definitions—Definitions in Terminology C168 apply to
tions prior to use.
terms used in this specification.
2. Referenced Documents
4. Classification
2
2.1 ASTM Standards:
4.1 Classification of vapor retarders is based on vapor
C168 Terminology Relating to Thermal Insulation
retardance and strength properties, as listed in Table 1.
1 5. Materials and Manufacture
This specification is under the jurisdiction of ASTM Committee C16 on
Thermal Insulation and is the direct responsibility of Subcommittee C16.33 on
5.1 It is possible to construct vapor retarders from any
Insulation Finishes and Moisture.
number of various films, foils, cloths, papers, and reinforce-
Current edition approved May 1, 2008. Published June 2008. Originally
ments, alone or in combination, to achieve required perfor-
approved in 1990. Last previous edition approved in 2006 as C1136–06. DOI:
10.1520/C1136-08.
mance.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Withdrawn. The last approved version of this historical standard is referenced
the ASTM website. on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C1136 – 08
TABLE 1 Physical Property Requirements
Physical Properties Type I Type II Type III Type IV Type V Type VI
Permeance, max 0.02 (1.15) 0.02 (1.15) 0.10 (5.75) 0.10 (5.75) 0.02 (1.15) 0.03 (1.72)
−1 −1 −2
Perms (ng·Pa ·s ·m )
Burst Strength, min 55 (380) 35 (240) 55 (380) 35 (240) 100 (690) 100 (690)
psi (kPa)
Tensile, Machine Direction 45 (7.9) 30 (5.3) 45 (7.9) 30 (5.3) 40 (7.0) 20 (3.5)
lb/in. width, min (N/mm width, min)
Tensile, Cross Direction 30 (5.3) 20 (3.5) 30 (5.3) 20 (3.5) 60 (10.6) 30 (5.3)
lb/in. width, min (N/mm width, min)
D
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