ASTM D4869-03

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Designation: D 4869 – 03
Standard Specification for
Asphalt-Saturated Organic Felt Underlayment Used in Steep
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Slope Roofing
This standard is issued under the fixed designation D 4869; 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
5
Gasket Material to Moisture
1.1 This specification covers asphalt-saturated organic felt
for use as an underlayment with steep slope roofing.
3. Terminology
1.2 The values stated in SI units are to be regarded as the
3.1 Definitions—For definitions of terms used in this speci-
standard.
fication, refer to Terminology D 1079.
1.3 The objective of this specification is to provide a
finished product that will lie flat and resist wrinkling, pucker-
4. Classification
ing, and shrinking when left exposed to the sun, rain, frost, or
4.1 Asphalt saturated felts covered by this specification are
dew for a period of two weeks after application.
of four types:
1.4 The following safety hazards caveat pertains only to the
4.1.1 Type I—#8 Underlayment,
test method portion, Section 8, of this specification: This
4.1.2 Type II—#13 Underlayment,
standard does not purport to address all of the safety concerns,
4.1.3 Type III—#20 Underlayment, and
if any, associated with its use. It is the responsibility of the user
4.1.4 Type IV—#26 Underlayment.
of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limita-
5. Materials and Manufacture
tions prior to use.
5.1 In the process of manufacture, a single thickness of
organic dry felt shall be uniformly saturated with an asphaltic
2. Referenced Documents
saturant.
2.1 ASTM Standards:
5.2 The felt shall be produced principally from organic
D 70 Test Method for Specific Gravity and Density of
2 fibers. The surface of the felt shall be uniform and relatively
Semi-Solid Bituminous Materials (Pychnometer Method)
smooth. Upon splitting or tearing on the bias, the felt shall
D 146 Test Methods for Sampling and Testing Bitumen-
appear free of lumps or particles of foreign substances.
Saturated Felts and Woven Fabrics for Roofing and Wa-
3
terproofing
6. Physical Requirements
D 228 Test Methods for Sampling, Testing, and Analysis of
6.1 The material shall conform to the physical requirements
Asphalt Roll Roofing, Cap Sheets, and Shingles Used in
prescribed in Table 1 and the dimensions and masses pre-
3
Roofing and Waterproofing
scribed in Table 2.
D 1079 Terminology Relating to Roofing, Waterproofing,
6.2 The finished product shall not crack nor be so sticky as
3
and Bituminous Materials
to cause tearing or other damage upon being unrolled at
D 1922 Test Method for Propagation Tear Resistance of
temperatures between 0 and 60°C (32 and 140°F).
4
Plastic Film and Thin Sheeting by Pendulum Method
6.3 The finished product shall pass the water shower expo-
D 6136 Test Method for Kerosene Number of Unsaturated
sure test described in 8.3, indicating resistance to liquid water
3
(Dry) Felt by the Vacuum Method
transmission.
7. Workmanship, Finish, and Appearance
1
This specification is under the jurisdiction of ASTM Committee D08 on
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.02
7.1 The felt shall be thoroughly and uniformly saturated,
on Prepared Roofings, Shingles, and Siding Materials.
and shall show no unsaturated spots at any point upon cutting
Current edition approved July 10, 2003. Published August 2003. Originally
approved in 2002. Last previous edition approved in 2002 as D 4869 – 02.
2
Annual Book of ASTM Standards, Vol 04.03.
3
Annual Book of ASTM Standards, Vol 04.04.
4 5
Annual Book of ASTM Standards, Vol 08.01. Annual Book of ASTM Standards, Vol 09.02.
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D4869–03
TABLE 1 Physical Requirements
Type I Type II Type III Type IV
Tear strength, 23 6 2°C (73 6 4°F) min, N (lbf) 2.0 2.0 4.0 4.0
(both cross and with direction of sheet) (0.45) (0.45) (0.90) (0.90)
Pliability at 23 6 2°C (73 6 4°F). Ten strips 12.7 mm 12.7 mm 19.1 mm 19.1 mm
tested shall not crack when bent 90° at a (0.50 in.) (0.50 in.) (0.75 in.) (0.75 in.)
uniform speed over a rounded corner of
radius in table for each type.
Loss on heating at 105°C (221°F) for 5 h max, % 6 6 6 6
Liquid water transmission test Pass Pass Pass Pass
Breaking strength at 23 6 2°C (73 6 4°F), kN/m 5.3 (30) 5.3 (30) 7.0 (40) 7.0 (40)
(lbf/in.), min MD and CD 2.6 (15) 2.6 (15) 3.5 (20) 3.5 (20)
Dimension
...