ASTM C1263-95(2021)
(Test Method)Standard Test Method for Thermal Integrity of Flexible Water Vapor Retarders
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
- Technical Committee
- C16 - Thermal Insulation
- Drafting Committee
- C16.33 - Insulation Finishes and Moisture
Relations
- Effective Date
- 15-Apr-2024
- Effective Date
- 15-Apr-2018
- Effective Date
- 01-Jun-2017
- Effective Date
- 15-May-2017
- Effective Date
- 01-Nov-2016
- Effective Date
- 15-Oct-2015
- Effective Date
- 01-Jun-2015
- Effective Date
- 01-Apr-2013
- Effective Date
- 01-Sep-2012
- Effective Date
- 01-May-2010
- Effective Date
- 01-Jan-2010
- Effective Date
- 01-Nov-2009
- Effective Date
- 15-Dec-2008
- Effective Date
- 01-Sep-2008
- Effective Date
- 01-Jun-2008
Overview
ASTM C1263-95(2021), Standard Test Method for Thermal Integrity of Flexible Water Vapor Retarders, establishes a visual assessment procedure for determining the thermal integrity of flexible water vapor retarders. Developed by ASTM International, this standard specifically targets materials classified under ASTM C1136, such as plastic, foil, paper, and their composites. The method is ideal for verifying the resistance of vapor retarders to cracking and delamination when exposed to temperature extremes ranging from −20 to 150°F (−29 to 66°C). These properties are critical for ensuring that vapor retarders maintain their effectiveness in preventing moisture migration in thermal insulation systems across a variety of environments.
Key Topics
Scope and Applicability
- Applies to flexible water vapor retarders used with thermal insulation
- Tests materials such as plastic, foil, paper, and their composites
- Does not apply to liquid-applied mastics or weather barriers
Test Method and Conditions
- Visual examination of specimens after exposure to both low and high temperature extremes
- Assessment focuses on visible signs of cracking or delamination
- Utilizes specifically controlled laboratory conditions for temperature and humidity
Pass/Fail Criteria
- Failure determined by any visible evidence of cracking or delamination across multiple test specimens
- Only a simple visual inspection is required - no precision measurements
Safety and Compliance
- Users are responsible for ensuring appropriate safety and environmental practices during testing
- Developed in accordance with WTO Technical Barriers to Trade (TBT) principles for international acceptance
Applications
The ASTM C1263-95(2021) standard is essential in various industries that rely on thermal insulation and moisture control. Key applications include:
Building and Construction
- Verification of vapor retarder performance in commercial and residential buildings
- Ensures insulation systems maintain moisture control integrity over a wide temperature range
Industrial Facilities
- Used in power plants, chemical processing, and manufacturing environments where thermal insulation is critical
- Helps ensure long-term durability of vapor retarders exposed to fluctuating thermal conditions
HVAC and Refrigeration Systems
- Validates the suitability of vapor retarders in ducts, piping, and equipment exposed to both cold and warm temperatures
Product Qualification and Quality Assurance
- Manufacturers can use this test method during product development or as a quality control measure
- Specifiers and project managers can require compliance for project materials to ensure consistent performance
Related Standards
For comprehensive vapor retarder testing and specification, the following related ASTM standards are commonly referenced:
- ASTM C1136 – Specification for Flexible, Low Permeance Vapor Retarders for Thermal Insulation: Describes the classification and performance requirements for the types of vapor retarders tested under ASTM C1263.
- ASTM C168 – Terminology Relating to Thermal Insulation: Defines key terms used throughout ASTM insulation-related standards.
- Additional national and international standards may further address weather barriers, liquid coatings, or other insulation system components.
Keywords: thermal integrity, flexible vapor retarder, ASTM C1263, water vapor barrier, thermal insulation, cracking, delamination, quality testing, building envelope, HVAC, ASTM standards.
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Frequently Asked Questions
ASTM C1263-95(2021) is a standard published by ASTM International. Its full title is "Standard Test Method for Thermal Integrity of Flexible Water Vapor Retarders". This standard covers: 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.
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.
ASTM C1263-95(2021) is classified under the following ICS (International Classification for Standards) categories: 91.100.50 - Binders. Sealing materials. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM C1263-95(2021) has the following relationships with other standards: It is inter standard links to ASTM C168-24, ASTM C168-18, ASTM C168-17, ASTM C1136-17, ASTM C1136-16, ASTM C168-15a, ASTM C168-15, ASTM C168-13, ASTM C1136-12, ASTM C1136-10, ASTM C168-10, ASTM C1136-09, ASTM C168-08b, ASTM C168-08a, ASTM C168-08. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM C1263-95(2021) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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
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.
2.1 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
...




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