ASTM C1136-00

Designation: C 1136 – 00
Standard Specification for
Flexible, Low Permeance Vapor Retarders for Thermal
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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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
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1. Scope Insulation Materials and Facings
D828 Test Method for Tensile Breaking Strength of Paper
1.1 This specification covers vapor retarders for thermal
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and Paperboard
insulation, specifically, flexible materials with permeance of
D882 Test Methods for Tensile Properties of Thin Plastic
0.10 perm or lower and surface burning characteristics of 25
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Sheeting
flame spread/50 smoke or lower. These materials are intended
D1204 Test Method for Linear Dimensional Changes of
for use at temperatures of−20 to 150°F (−29 to 66°C). It does
Nonrigid Thermoplastic Sheeting or Film at Elevated
notcovermasticsorbarriercoatingsappliedinliquidform,nor
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Temperature
materials intended for use as weather barriers.
E84 Test Method for Surface Burning Characteristics of
1.2 This specification provides physical requirements for
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Building Materials
vapor retarders. Practice C755 should provide assistance in
E96 Test Methods for Water Vapor Transmission of Mate-
solving problems related to moisture vapor transmission
2
rials
through thermal insulation materials.
2.2 TAPPI Standards:
1.3 The values stated in inch-pound units are to be regarded
T461 Flame Resistance of Treated Paper and Paperboard
as standard. The SI units given in parentheses are for informa-
T803 Puncture Test of Containerboard
tion only.
1.4 The following precautionary caveat pertains to the test
3. Terminology
methods portion only, Section 10, of this specification: This
3.1 Definitions—Definitions inTerminology C168 apply to
standard does not purport to address all of the safety concerns,
terms used in this specification.
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
4. Classification
practices and determine the applicability of regulatory limita-
4.1 Classification of vapor retarders is based on vapor
tions prior to use.
retardance and strength properties, as listed in Table 1.
2. Referenced Documents
5. Materials and Manufacture
2.1 ASTM Standards:
5.1 Vapor retarders may be constructed of any number of
C168 Terminology Relating to Thermal Insulating Materi-
2 variousfilms,foils,cloths,papers,andreinforcements,aloneor
als
in combination, to achieve required performance.
C755 Practice for Selection of Vapor Barriers for Thermal
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Insulations
6. Physical Properties
C1258 Test Method for Elevated Temperature and Humid-
6.1 Maximum permeance for a specific type vapor retarder
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ity Resistance of Vapor Retarders for Insulation
shall be as shown in Table 1 when tested in accordance with
C1263 TestMethodforThermalIntegrityofFlexibleWater
10.1.
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Vapor Retarders
6.2 All vapor retarders shall demonstrate a flame spread of
C1338 Test Method for Determining Fungi Resistance of
25 or less and smoke developed of 50 or less when testing the
finish side (the side opposite that contacting the insulation) in
1 accordance with 10.2.
This specification is under the jurisdiction of ASTM Committee C16 on
Thermal Insulation and is the direct responsibility of Subcommittee C16.33 on
Insulation Finishes and Moisture.
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Current edition approved Dec. 10, 2000. Published February 2001. Originally Annual Book of ASTM Standards, Vol 15.09.
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published as C1136–90. Last previous edition C1136–95. Annual Book of ASTM Standards, Vol 08.01.
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Annual Book of ASTM Standards, Vol 04.06. Annual Book of ASTM Standards, Vol 04.07.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C 1136
TABLE 1 Physical Property Requirements
tothepassageofsuchvaporintotheinstalledinsulationshould
Type be provided.This is the primary function of the vapor retarder.
Physical Property
9.2 In addition to the function stated in 9.1, a vapor retarder
I II III IV
may provide physical protection and added strength to the
Permeance, max, Perms 0.02 (1.15) 0.02 (1.15) 0.10 (5.75) 0.10 (5.75)
−1 −1 −2
(ng·Pa s m )
insulation system.
Puncture Resistance, min, 50 (58) 25 (29) 50 (58) 25 (29)
9.3 Thisspecificationisusedtospecifymaterialbyphysical
Beach units (metric units)
propertyrequirementsthataddresstheaboveprerequisites.The
Machine Direction Tensile, 45 (7.9) 30 (5.3) 45 (7.9) 30 (5.3)
min, lb/in. width (N/mm
designer of an insulation system, after determining the degree
width)
of protection needed for the insulation, can use this specifica-
Cross Direction Tensile, min, 30 (5.
...