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ASTM D6757-02

(Specification)

Standard Specification for Inorganic Underlayment for Use with Steep Slope Roofing Products

Standard Specification for Inorganic Underlayment for Use with Steep Slope Roofing Products

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 standard 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
09-Jan-2002
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

Replaced By
ASTM D6757-04 - Standard Specification for Steep-Slope Underlayment Felt Containing Inorganic Fibers
Effective Date
01-Jul-2004

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ASTM D6757-02 - Standard Specification for Inorganic Underlayment for Use with Steep Slope Roofing ProductsASTM D6757-02 - Standard Specification for Inorganic Underlayment for Use with Steep Slope Roofing Products
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ASTM D6757-02 - Standard Specification for Inorganic Underlayment for Use with Steep Slope Roofing Products
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 – 02
Standard Specification for
Inorganic Underlayment for Use with Steep Slope Roofing
Products
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 3. Terminology
1.1 This specification covers (1) inorganic fiber reinforced 3.1 Definitions—For definitions of terms used in this speci-
organic felt underlayment and (2) inorganic fiber based felt for fication, refer to Terminology D 1079.
use as underlayment with steep slope roofing products. The
4. Classification
intent of this standard is to provide criteria for producing and
evaluating underlayments with a significantly reduced ten- 4.1 Organic felts that are reinforced with inorganic fibers are
covered by this specification.
dency to wrinkle before or after the installation of steep roofing
products. 4.2 Inorganic fiber based asphaltic and nonasphaltic felts are
covered by this specification.
1.2 The values stated in SI units are to be regarded as the
standard. The values in parentheses are for information only.
5. Materials and Manufacture
1.3 The following safety hazards caveat pertains only to the
5.1 In the process of manufacture, a single thickness of
test method portion, Section 8, of this specification: This
inorganic mat or organic felt that is reinforced with inorganic
standard does not purport to address all of the safety concerns,
fibers shall be uniformly saturated or coated. This coating may
if any, associated with its use. It is the responsibility of the user
or may not be mineral filled.
of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory require-
6. Performance Requirements
ments prior to use.
6.1 The material shall conform to the physical requirements
2. Referenced Documents
prescribed in Table 1.
2.1 ASTM Standards: 6.2 The finished product shall not crack nor be so sticky as
to cause tearing or other damage upon being unrolled at
D 146 Test Methods for Sampling and Testing Bitumen-
temperatures between –1 and 60°C (30 and 140°F). The
Saturated Felts and Woven Fabrics for Roofing and Wa-
finished product shall pass the water shower exposure test
terproofing
described in 8.1.4, indicating resistance to liquid water trans-
D 228 Test Methods for Sampling, Testing, and Analysis of
mission.
Asphalt Roll Roofing, Cap Sheets, and Shingles Used in
Roofing and Waterproofing
7. Dimensions, Masses, Workmanship, Finish, and
D 1079 Terminology Relating to Roofing, Waterproofing,
Appearance
and Bituminous Materials
7.1 Dimensions and masses to be agreed upon between
D 3462 Specification for Asphalt Shingles Made from Glass
buyer and seller.
Felt and Surfaced with Mineral Granules
7.2 The finished material shall be free of visible external
D 4869 Specification for Asphalt-Saturated Organic Felt
defects, such as holes, ragged or untrue edges, breaks, cracks,
Underlayment Used in Steep Slope Roofing
tears, bulges, and indentations.
F 1087 Test Method for Linear Dimensional Stability of a
Gasket Material to Moisture
8. Sampling and Test Methods
8.1 Sample the material and determine the properties enu-
This specification is under the jurisdiction of ASTM Committee D08 on
merated in this specification in accordance with Test Methods
Roofing, Waterproofing, and Bituminous Materials and is the direct responsibility of
D 146.
Subcommittee D08.02 on Prepared Roofing.
8.1.1 Tear Strength—Use test method as described in Speci-
Current edition approved Jan. 10, 2002. Published March 2002.
Annual Book of ASTM Standards, Vol 04.04. fication D 3462.
Annu
...

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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.  
5.3 This practice alone does not determine the cause of moisture infiltration into roofing or waterproofing systems; however, it can be used to help tracing excess moisture to the point of ingress.
SCOPE
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.  
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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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