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ASTM D6757-04a

(Specification)

Standard Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope Roofing

Standard Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope Roofing

SCOPE
1.1 This specification covers (1) inorganic fiber-reinforced organic felt underlayment and ( 2) inorganic fiber-based felt for use as underlayment with steep-slope roofing products. The intent of this specification is to provide criteria for producing and evaluating underlayments with a significantly reduced tendency to wrinkle before or after the installation of steep roofing products.
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
1.3 The following safety hazards caveat pertains only to the test method portion, Section 8, of this specification: 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 requirements prior to use.

General Information

Status
Historical
Publication Date
31-Oct-2004
ICS
91.060.20 - Roofs
Technical Committee
D08 - Roofing and Waterproofing
Drafting Committee
D08.02 - Steep Roofing Products and Assemblies
Current Stage
Ref Project

Relations

Replaces
ASTM D6757-04 - Standard Specification for Steep-Slope Underlayment Felt Containing Inorganic Fibers
Effective Date
01-Nov-2004
Replaced By
ASTM D6757-05 - Standard Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope Roofing
Effective Date
01-Jan-2005

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ASTM D6757-04a - Standard Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope RoofingASTM D6757-04a - Standard Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope Roofing
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ASTM D6757-04a - Standard Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope Roofing
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D 6757 – 04a
Standard Specification for
Underlayment Felt Containing Inorganic Fibers Used in
1
Steep-Slope Roofing
This standard is issued under the fixed designation D 6757; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope F 1087 Test Method for Linear Dimensional Stability of a
Gasket Material to Moisture
1.1 This specification covers (1) inorganic fiber-reinforced
organic felt underlayment and (2) inorganic fiber-based felt for
3. Terminology
use as underlayment with steep-slope roofing products. The
3.1 Definitions—For definitions of terms used in this speci-
intent of this specification is to provide criteria for producing
fication, refer to Terminology D 1079.
and evaluating underlayments with a significantly reduced
tendency to wrinkle before or after the installation of steep
4. Classification
roofing products.
4.1 Organicfeltsthatarereinforcedwithinorganicfibersare
1.2 The values stated in SI units are to be regarded as the
covered by this specification.
standard. The values in parentheses are for information only.
4.2 Inorganic fiber-based asphaltic and nonasphaltic felts
1.3 The following safety hazards caveat pertains only to the
are covered by this specification.
test method portion, Section 8, of this specification: This
standard does not purport to address all of the safety concerns,
5. Materials and Manufacture
if any, associated with its use. It is the responsibility of the user
5.1 In the process of manufacture, a single thickness of
of this standard to establish appropriate safety and health
inorganic mat or organic felt that is reinforced with inorganic
practices and determine the applicability of regulatory require-
fibers shall be uniformly saturated or coated.
ments prior to use.
6. Performance Requirements
2. Referenced Documents
6.1 The material shall conform to the physical requirements
2
2.1 ASTM Standards:
prescribed in Table 1.
D 146 Test Methods for Sampling and Testing Bitumen-
6.2 The finished product shall not crack nor be so sticky as
Saturated Felts and Woven Fabrics for Roofing and Wa-
to cause tearing or other damage upon being unrolled at
terproofing
temperatures between –1 and 60°C (30 and 140°F). The
D 228 Test Methods for Sampling, Testing, andAnalysis of
finished product shall pass the water shower exposure test
Asphalt Roll Roofing, Cap Sheets, and Shingles Used in
described in 8.1.4, indicating resistance to liquid water trans-
Roofing and Waterproofing
mission.
D 1079 Terminology Relating to Roofing, Waterproofing,
and Bituminous Materials
7. Dimensions, Masses, Workmanship, Finish, and
D 3462 SpecificationforAsphaltShinglesMadefromGlass
Appearance
Felt and Surfaced with Mineral Granules
7.1 Dimensions and masses to be agreed upon between
D 4869 Specification for Asphalt-Saturated Organic Felt
buyer and seller.
Underlayment Used in Steep Slope Roofing
7.2 The finished material shall be free of visible external
defects, such as holes, ragged or untrue edges, breaks, cracks,
1
tears, bulges, and indentations.
This specification is under the jurisdiction of ASTM Committee D08 on
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.02
on Prepared Roofing, Shingles, and Siding Materials. 8. Sampling and Test Methods
Current edition approved Nov. 1, 2004. Published November 2004. Originally
8.1 Sample the material and determine the properties enu-
approved in 2002. Last previous edition approved in 2004 as D 6757 – 04.
2
merated in this specification in accordance with Test Methods
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
D 146.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D 6757 – 04a
TABLE 1 Performance Requirements
8.2.2 Precision and Bias—To be determined.
Tear strength, min at 23 6 2°C, (73 6 4°F), 4.0, (0.88) (in any direction)
N, (lbf)
9. Inspection
Pliability at 23 6 2°C, (73 6 4°F), the ten strips pass
9.1 Inspection of the material shall be made as agreed upon
tested shall not crack when bent 90°
at a uniform speed over a 19 mm (0.75 in.)
betweenthepurchaserandthesupplierasapartofthepurchase
radius corner in 2 s
contract.
Behavior (loss) on heating at 105°C (221°F) 4
for 5 h, max, %
10. Rejection and Resubmittal
Liquid water transmission test pass
Dimensional stability, conditioned to wet, 1.25
10.1 Failure to
...

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5.1 Excess moisture trapped in roofing or waterproofing systems can adversely affect performance and lead to premature failure of roofing or waterproofing systems and its components. It also reduces thermal resistance, resulting in reduced energy efficiency and inflated energy costs. Impedance scans can be effective in identifying concealed and entrapped moisture within roofing or waterproofing systems.  
5.2 This practice is intended to be used at various stages of the roofing and waterproofing system’s life such as: during or at completion of installation of roofing or waterproofing system to determine if there was moisture intrusion into the roofing or waterproofing system or underlying materials; at regular intervals as part of a preventative maintenance program; and to aid in condition assessment, or before replacement or repair work, or combinations thereof, to assist in determining the extent of work and replacement materials.  
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1.1 This practice applies to techniques that use nondestructive electrical impedance (EI) scanners to locate moisture and evaluate the comparative moisture content within insulated low-slope roofing and waterproofing systems.  
1.2 This practice is applicable to roofing and waterproofing systems wherein insulation is placed above the deck and positioned underneath and in contact with electrically nonconductive single-ply or built-up roofing and waterproofing membranes and systems such as coal tar, asphalt, modified bitumen, thermoplastics, spray polyurethane foam, and similar electrically nonconductive membrane materials. This practice is also applicable to roofing and waterproofing systems without insulation placed above moisture absorbing decks such as wood, concrete, or gypsum, that are in contact with single-ply or built-up roofing and waterproofing membranes as described above.  
1.3 This practice is applicable to roofing and waterproofing systems incorporating electrically nonconductive rigid board insulation made from materials such as organic fibers, perlite, cork, fiberglass, wood-fiber, polyisocyanurate, polystyrene, phenolic foam, composite boards, gypsum substrate boards, and other electrically nonconductive roofing and waterproofing systems such as spray-applied polyurethane foam.  
1.4 This practice is not appropriate for all combinations of materials used in roofing and waterproofing systems.  
1.4.1 Metal and other electrically conductive surface coverings and near-surface embedded metallic components are not suitable for surveying with impedance scanners because of the electrical conductivity of these materials.  
1.4.2 This practice is not appropriate for use with black EPDM, any membranes containing black EPDM, or black EPDM coatings because black EPDM gives false positive readings.  
1.4.3 Aluminum foil on top-faced insulation, roofing, or waterproofing membranes gives a false positive reading and is not suitable for surveying with impedance scanners; however, liquid-applied aluminum pigmented emulsified asphalt-based coatings shall not normally affect impedance scanner readings.
1.4.3.1 This practice is not appropriate for use with aluminium foil faced modified bitumen membranes, as the electrical conductivity of the aluminium foil surface can give false positive readings.  
1.4.4 While their overburden remains in place, this practice is not appropriate for use with inverted roof membrane assemblies (IRMAs) or protected roof assemblies (PRMAs), which contain above the deck waterproof membrane and overburden that may include insulation, drainage components, pavers, aggregate, ballast, vegetation, or combinations thereof, because the impedance scanner will not differentiate between above and below the membrane moisture.  
1.4.5 S...

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1.1 This specification addresses mechanically attached polymeric roof underlayment used in steep slope roofing.  
1.2 The objective of this specification is to provide a finished product that will be used as a water-shedding underlayment layer on steep sloped roofs prior to and after installation of the primary roof covering.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.  
1.4 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.  
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5.1 An important factor affecting the performance of seams of EPDM membranes is their ability to remain bonded over the membrane's expected service life. Time-to-failure tests provide a means of characterizing the behavior of joints under constant load over time.
Note 1: Table 1 is based on the results of an industry government consortium study on creep-rupture resistance (time-to-failure) of EPDM adhesive joints.4,5 Referral to Footnotes 4 and 5 provides typical time-to-failure data, developed under the conditions in Table 1, for EPDM joints fabricated in the laboratory with non-reinforced EPDM roof membrane material, butyl-based tapes, and liquid adhesives. It is noted that the peel load specified in this practice is 9.8 N [2.2 lbf]. The peel load under which the tests described in Footnotes 4 and 5 were conducted was 9.3 N [2.1 lbf]. A load of 9.8 N [2.2 lbf] corresponds to 1 kgf [2.2 lbf], and dead weights of 1-kg [2.2-lbm] mass are available through laboratory equipment supply houses. Similarly, a load of 29.4 N [6.6 lbf] corresponds to a dead weight of 3-kg [6.6-lbm] mass.  
5.2 Time-to-failure tests complement other mechanical tests such as strength for characterizing joints of EPDM roof membranes, and can be incorporated in specifications for adhesives for joining EPDM roof membrane material.  
5.3 This practice, which is specific to EPDM joints, complements Test Method D5405/D5405M that provides general requirements for the preparation and creep-rupture testing of joints fabricated from any nonbituminous organic roof membrane material.  
5.4 Laboratory experience in conducting time-to-failure tests of joints EPDM roof membranes has shown that specimens are less creep-resistant under peel loading than under shear loading. Consequently, the majority of the tests stipulated in this practice are performed under peel loading.  
5.5 This practice does not develop time-to-failure data on all environmental conditions to which EPDM adhesive seams can be subjec...
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1.2 This practice is applicable to joints fabricated in the laboratory from EPDM roof membrane materials and adhesives received from suppliers, and to joints prepared from EPDM seams sampled from field installations.  
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1.7 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.

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