ASTM D226/D226M-17(2023)

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: D226/D226M − 17 (Reapproved 2023)
Standard Specification for
Asphalt-Saturated Organic Felt Used in Roofing and
Waterproofing
This standard is issued under the fixed designation D226/D226M; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope D146/D146M Test Methods for Sampling and Testing
Bitumen-Saturated Felts and Woven Fabrics for Roofing
1.1 This specification covers asphalt-saturated organic felts,
and Waterproofing
with or without perforations, intended to be used with asphalts
D312/D312M Specification for Asphalt Used in Roofing
conforming to the requirements of Specification D312/D312M
D449/D449M Specification for Asphalt Used in Dampproof-
in the construction of built-up roofs, and with asphalts con-
ing and Waterproofing
forming to the requirements of Specification D449/D449M in
D1079 Terminology Relating to Roofing and Waterproofing
the construction of water proofing systems.
D6136/D6136M Test Method for Kerosine Number of Un-
1.2 The values stated in either SI units or inch-pound units
saturated (Dry) Felt by Vacuum Method
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
3. Terminology
system shall be used independently of the other. Combining
3.1 Definitions—For definitions of terms used in this
values from the two systems may result in non-conformance
specification, refer to Terminology D1079.
with the standard.
1.3 The following safety hazards caveat pertains only to the
4. Classification
test method portion, Section 8, of this specification: This
4.1 Asphalt-saturated felts covered by this specification are
standard does not purport to address all of the safety concerns,
of two types:
if any, associated with its use. It is the responsibility of the user
4.1.1 Type I—Commonly called No. 15 asphalt felt.
of this standard to establish appropriate safety, health, and
4.1.2 Type II—Commonly called No. 30 asphalt felt.
environmental practices and determine the applicability of
regulatory limitations prior to use.
5. Materials and Manufacture
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
5.1 In the process of manufacture a single thickness of dry
ization established in the Decision on Principles for the
felt shall be saturated with an asphaltic saturant.
Development of International Standards, Guides and Recom-
5.2 The felt shall be produced principally from organic
mendations issued by the World Trade Organization Technical
fibers. The surface of the felt shall be uniform and relatively
Barriers to Trade (TBT) Committee.
smooth. Upon splitting or tearing on the bias, the felt shall
appear reasonably free of lumps or particles of foreign sub-
2. Referenced Documents
stances.
2.1 ASTM Standards:
D70/D70M Test Method for Specific Gravity and Density of
6. Physical Requirements
Semi-Solid Asphalt Binder (Pycnometer Method)
6.1 The material shall conform to the physical requirements
prescribed in Table 1 and the dimensions and masses pre-
This specification is under the jurisdiction of ASTM Committee D08 on
scribed in Table 2.
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.02
on Steep Roofing Products and Assemblies.
6.2 The finished product shall not crack nor be so sticky as
Current edition approved Feb. 1, 2023. Published February 2023. Originally
to cause tearing or other damage upon being unrolled at
approved in 1925. Last previous edition approved in 2017 as D226/D226M – 17.
temperatures between 10 °C and 60 °C [50 °F and 140 °F].
DOI: 10.1520/D0226_D0226M-17R23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.3 Perforated felts shall conform to the same requirements
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
as the plain type but shall also have uniformly spaced perfo-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. rations.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D226/D226M − 17 (2023)
TABLE 1 Physical Requirements of Asphalt-Saturated Roofing Felt
Type I Type II
Average breaking strength, min, kN/m [lbf/in.] of width:
With fiber grain 5.3 [30] 7.0 [40]
Across fiber grain 2.6 [15] 3.5 [20]
Pliability at 25 °C [77 °F]
1 3
The ten strips tested shall not crack when bent 90° 12.7 mm [ ⁄2 in.] radius 19.1 mm [ ⁄4 in.] radius
at a uniform speed over a rounded corner of:
Loss on heating at 105 °C [221 °F] for 5 h, max, % 4 4
TABLE 2 Dimensions and Masses of Asphalt-Saturated Roofing Felt
Type I Type II
Width of roll, mm [in.] 914 [36] ± 0.7 % or as agreed upon by purchaser and seller
2 2 A A
Area of roll, min, m [ft ] 20.1 [216] or 40.1 [432] 20.1 [216]
B
Moisture, at point of manufacture, max % 4.3 4.1
2 2
Net mass of saturated felt, min, g/m [lb ⁄100 ft ] 560 [11.5] 1270 [26]
2 2 C
Mass of saturant, min, g/m [lb ⁄100 ft ] 303 [6.2] 732 [15.0]
2 2
Mass of desaturated felt, min, g/m [lb ⁄100 ft ] 254 [5.2] 488 [10.0]
Ash, max, % 10.0 10.0
2 2
Perforated felt, avg, area of individual hole, max, mm [in. ] 32 [0.05] .
Average venting area, min, % 0.1 .
A
Other areas as agreed upon by purchaser and seller.
B
At time of manufacture. Products with a higher moisture content at the time of installation may cause hot materials to foam, creating voids that may result in blisters.
C
The mass of saturant shall not be less than 1.2 times the mass of the dry felt for Type I with a saturation efficiency of not less than 70 %. The mass of the saturant shall
not be less than 1.50 times the mass of dry felt for Type II.
7. Workmanship, Finish, and Appearance differences when rows are off-set from each other. Calculate
the average number of perforations per specimen, P.
7.1 The felt shall be thoroughly and uniformly saturated,
8.2.2 Place the specimen on a sheet of white paper with the
and shall show no unsaturated spots at any point upon cutting
smoother side up (side from which the needling or perforating
50 mm [2 in.] wide strips at r
...