ASTM C1263-95(2021)

Standard Test Method for Thermal Integrity of Flexible Water Vapor Retarders

SIGNIFICANCE AND USE
4.1 In many applications, the vapor retarders used on a thermal insulation will be exposed to the temperatures listed in 7.2. Cracking or delamination of the retarder under these conditions would, in most cases, cause it to lose its effectiveness as a vapor retarder material.
SCOPE
1.1 This test method covers the visual determination of the thermal integrity of flexible water vapor retarders for those materials classified under Specification C1136, including plastic, foil, or paper and composites of two or more of these materials to temperatures listed in the specification or purchase contract. The vapor retarders are intended for use at temperatures of −20 to 150°F (−29 to 66°C). This test method does not cover mastics or barrier coatings applied in liquid form or materials intended for use as weather barriers.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 28-Feb-2021
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.33 - Insulation Finishes and Moisture

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1263 − 95 (Reapproved 2021)
Standard Test Method for
1
Thermal Integrity of Flexible Water Vapor Retarders
This standard is issued under the fixed designation C1263; 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.
1. Scope 4. Significance and Use
1.1 This test method covers the visual determination of the 4.1 In many applications, the vapor retarders used on a
thermal integrity of flexible water vapor retarders for those thermal insulation will be exposed to the temperatures listed in
materials classified under Specification C1136, including 7.2. Cracking or delamination of the retarder under these
plastic, foil, or paper and composites of two or more of these conditions would, in most cases, cause it to lose its effective-
materialstotemperatureslistedinthespecificationorpurchase ness as a vapor retarder material.
contract. The vapor retarders are intended for use at tempera-
5. Apparatus
turesof−20to150°F(−29to66°C).Thistestmethoddoesnot
cover mastics or barrier coatings applied in liquid form or
5.1 1 in. (25 mm) Outside Diameter Solid, Mild Steel
materials intended for use as weather barriers.
Mandrel.
1.2 The values stated in inch-pound units are to be regarded
5.2 Laboratory Oven, capable of maintaining 63°F (2°C)
as standard. The values given in parentheses are mathematical
up to a temperature of 150°F (66°C).
conversions to SI units that are provided for information only
5.3 Laboratory Freezer, capable of maintaining 63°F (2°C)
and are not considered standard.
down to a temperature of−20°F (−29°C).
1.3 This standard does not purport to address all of the
5.4 Room or Cabinet, capable of maintaining 73.4 6 3°F
safety concerns, if any, associated with its use. It is the
(23 6 2°C) and 50 6 2% relative humidity.
responsibility of the user of this standard to establish appro-
5.5 Insulated Gloves.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
6. Test Specimen
1.4 This international standard was developed in accor-
6.1 From each sampled vapor retarder, test three 1 ft (305
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the mm)squarespecimensforeachtemperatureextremespecified.
Development of International Standards, Guides and Recom-
7. Procedure
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
7.1 Condition test specimen at a temperature of 73.4 6 3°F
(23 6 2°C) and a relative humidity of 50 6 2% for a period
2. Referenced Documents
of 24 h.
2
2.1 ASTM Standards:
7.2 Expose the specimen and the mandrel to the test
C168Terminology Relating to Thermal Insulation
temperatures of−20 and 150°F (−29 and 66°C) for a period of
C1136Specification for Flexible, Low Permeance Vapor
4h.
Retarders for Thermal Insulation
7.3 At the end of the exposure period, with specimen and
3. Terminology
mandrel at test temperatures, bend each specimen around the
mandrel once through an angle of 180° in 3 6 2 s so that the
3.1 Definitions—Definitions of terms used in this test
opposing sides are parallel. If the two surfaces of the test
method will be found in Terminology C168.
specimenaremateriallydifferent,sixspecimensshallbetested
with three specimens of each surface tested on the outside of
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC16onThermal
the bend.
Insulation and is the direct responsibility of Subcommittee C16.33
Current edition approved March 1, 2021. Published April 2021. Originally
NOTE 1—When test conditions specify both low temperature and high
approved in 1994. Last previous edition approved in 2015 as C1263–95 (2015).
temperature exposure conditions on the same vapor retarder, it is satis-
DOI: 10.1520/C1263-95R21.
2
factory to use the same specimen or to select separate specimens for each
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
oftheexposedtemperatures,unlessthespecificationorcontractexplicitly
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on states that exposure tests must be conducted on the same specimen. If the
the ASTM website. latter is so, the test specimen must be reconditioned before submitting it
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