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ASTM C1263-95(2010)

(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
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Oct-2010
ICS
91.100.50 - Binders. Sealing materials
Technical Committee
C16 - Thermal Insulation
Drafting Committee
C16.33 - Insulation Finishes and Moisture
Current Stage
Ref Project

Relations

Replaces
ASTM C1263-95(2005)e1 - Standard Test Method for Thermal Integrity of Flexible Water Vapor Retarders
Effective Date
01-Nov-2010
Referred By
ASTM C1423-21 - Standard Guide for Selecting Jacketing Materials for Thermal Insulation
Effective Date
01-Nov-2010
Referred By
ASTM C1916-21 - Standard Specification for Flexible Protective Jackets Made of Modified Asphalt/Butyl Rubber for Use over Thermal Insulation
Effective Date
01-Nov-2010
Referred By
ASTM C1775-22 - Standard Specification for Laminate Protective Jacket and Tape for Use over Thermal Insulation for Outdoor Applications
Effective Date
01-Nov-2010
Referred By
ASTM C1136-23 - Standard Specification for Flexible, Low Permeance Vapor Retarders for Thermal Insulation
Effective Date
01-Nov-2010

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ASTM C1263-95(2010) - Standard Test Method for Thermal Integrity of Flexible Water Vapor RetardersASTM C1263-95(2010) - Standard Test Method for Thermal Integrity of Flexible Water Vapor Retarders
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ASTM C1263-95(2010) - Standard Test Method for Thermal Integrity of Flexible Water Vapor Retarders
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C1263 − 95 (Reapproved2010)
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 conditions would, in most cases, cause it to lose its effective-
ness as a vapor retarder material.
1.1 This test method covers the visual determination of the
thermal integrity of flexible water vapor retarders for those
5. Apparatus
materials classified under Specification C1136, including
plastic, foil, or paper and composites of two or more of these
5.1 1 in. (25 mm) Outside Diameter Solid, Mild Steel
materialstotemperatureslistedinthespecificationorpurchase
Mandrel.
contract. The vapor retarders are intended for use at tempera-
5.2 Laboratory Oven, capable of maintaining 63°F (2°C)
turesof−20to150°F(−29to66°C).Thistestmethoddoesnot
up to a temperature of 150°F (66°C).
cover mastics or barrier coatings applied in liquid form or
5.3 Laboratory Freezer, capable of maintaining 63°F (2°C)
materials intended for use as weather barriers.
down to a temperature of−20°F (−29°C).
1.2 The values stated in inch-pound units are to be regarded
5.4 Room or Cabinet, capable of maintaining 73.4 6 3°F
as standard. The values given in parentheses are mathematical
(23 6 2°C) and 50 6 2% relative humidity.
conversions to SI units that are provided for information only
and are not considered standard.
5.5 Insulated Gloves.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
6. Test Specimen
responsibility of the user of this standard to establish appro-
6.1 From each sampled vapor retarder, test three 1 ft (305
priate safety and health practices and determine the applica-
mm)squarespecimensforeachtemperatureextremespecified.
bility of regulatory limitations prior to use.
7. Procedure
2. Referenced Documents
7.1 Condition test specimen at a temperature of 73.4 6 3°F
2.1 ASTM Standards:
(23 6 2°C) and a relative humidity of 50 6 2% for a period
C168Terminology Relating to Thermal Insulation
of 24 h.
C1136Specification for Flexible, Low Permeance Vapor
Retarders for Thermal Insulation
7.2 Expose the specimen and the mandrel to the test
temperatures of−20 and 150°F (−29 and 66°C) for a period of
3. Terminology
4h.
3.1 Definitions—Definitions of terms used in this test
7.3 At the end of the exposure period, with specimen and
method will be found in Terminology C168.
mandrel at test temperatures, bend each specimen around the
mandrel once through an angle of 180° in 3 6 2 s so that the
4. Significance and Use
opposing sides are parallel. If the two surfaces of the test
4.1 In many applications, the vapor retarders used on a
specimenaremateriallydifferent,sixspecimensshallbetested
thermal insulation will be exposed to the temperatures listed in
with three specimens of each surface tested on the outside of
7.2. Cracking or delamination of the retarder under these
the bend.
NOTE 1—When test conditions specify both low temperature and high
1 temperature exposure conditions on the same vapor retarder, it is satis-
ThistestmethodisunderthejurisdictionofASTMCommitteeC16onThermal
fa
...

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5.1 On systems operating at sub-ambient temperature, humid ambient conditions cause a vapor driving force toward the insulation. If not retarded, the driven moisture vapor is detrimental to the insulation's thermal resistance. A vapor retarder must resist degradation in order maintain its resistance to vapor passage. Degradation in this test method is induced by elevated temperature and humidity conditions.
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1.1 This test method covers the determination of the resistance of flexible low permeance vapor retarders for thermal insulation as classified in Specification C1136 to elevated temperature and humidity. Water vapor permeance measurement and visual inspection after exposure at elevated temperature and humidity are used to assess vapor retarder response.  
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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.
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Standard Practice for Preparation of Specimens and Reporting of Results for Permeance Testing of Pressure Sensitive Adhesive Sealed Joints in Insulation Vapor Retarders

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5.1 PSA joints are a necessary and critical component of an insulation vapor retarder system and, in addition to knowing the permeance of the vapor retarder being used, assessing the permeance of the joints is necessary to indicate the expected performance of the system.  
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