ASTM D226-97a

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Designation: D 226 – 97a
Standard Specification for
Asphalt-Saturated Organic Felt Used in Roofing and
Waterproofing
This standard is issued under the fixed designation D 226; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3. Terminology
1.1 This specification covers asphalt-saturated organic felts, 3.1 Definitions—For definitions of terms used in this speci-
with or without perforations, intended to be used with asphalts fication, refer to Terminology D 1079.
conforming to the requirements of Specification D 312 in the 3.2 Definitions of Terms Specific to This Standard:
construction of built-up roofs, and with asphalts conforming to 3.2.1 lot—for the purpose of sampling, a lot shall consist of
the requirements of Specification D 449 in the construction of thesametypeandsizeofroofingfeltofferedfordeliveryatone
water proofing systems. time.
1.2 The values stated in inch-pound units are to be regarded
4. Classification
as the standard. The values given in parentheses are for
information only. 4.1 Asphalt-saturated felts covered by this specification are
of two types:
1.3 The following safety hazards caveat pertains only to the
test method portion, Section 8, of this specification: This 4.1.1 Type I—Commonly called No. 15 asphalt felt.
4.1.2 Type II—Commonly called No. 30 asphalt felt.
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user
5. Materials and Manufacture
of this standard to establish appropriate safety and health
5.1 In the process of manufacture a single thickness of dry
practices and determine the applicability of regulatory limita-
felt shall be saturated with an asphaltic saturant.
tions prior to use.
5.2 The felt shall be produced principally from organic
2. Referenced Documents
fibers. The surface of the felt shall be uniform and relatively
2.1 ASTM Standards: smooth. Upon splitting or tearing on the bias, the felt shall
appear reasonably free of lumps or particles of foreign sub-
D 70 Test Method for Specific Gravity and Density of
Semi-Solid Bituminous Materials stances.
D 146 Test Methods for Sampling and Testing Bitumen-
6. Physical Requirements
Saturated Felts and Woven Fabrics for Roofing and Wa-
6.1 The material shall conform to the physical requirements
terproofing
prescribed in Table 1 and the dimensions and masses pre-
D 312 Specification for Asphalt Used in Roofing
scribed in Table 2.
D 449 Specification forAsphalt Used in Dampproofing and
6.2 The finished product shall not crack nor be so sticky as
Waterproofing
to cause tearing or other damage upon being unrolled at
D 727 Test Method for Kerosine Number of Roofing and
temperatures between 50 and 140°F (10 and 60°C).
Flooring Felt by the Vacuum Method
6.3 Perforated felts shall conform to the same requirements
D 1079 Terminology Relating to Roofing, Waterproofing,
as the plain type but shall also have uniformly spaced perfo-
and Bituminous Materials
rations.
7. Workmanship, Finish, and Appearance
This specification is under the jurisdiction of ASTM Committee D-8 on
Roofing,Waterproofing, and Bituminous Materials and is the direct responsibility of
7.1 The felt shall be thoroughly and uniformly saturated,
Subcommittee D08.04 on Felts and Fabrics for Bituminous Roofing and Water-
and shall show no unsaturated spots at any point upon cutting
proofing.
Current edition approved July 10, 1997. Published January 1998. Originally
2-in. (50-mm) wide strips at random across the entire sheet and
published as D 226 – 25 T. Last previous edition D 226 – 97.
splitting them open for their full length.
Annual Book of ASTM Standards, Vol 04.03.
Annual Book of ASTM Standards, Vol 04.04.
Annual Book of ASTM Standards, Vol 15.09.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 226
TABLE 1 Physical Requirements of Asphalt-Saturated Roofing Felt
Type I Type II
Average breaking strength, min, lbf/in. (kN/m) of width:
With fiber grain 30 (5.25) 40 (7.00)
Across fiber grain 15 (2.63) 20 (3.50)
Pliability at 77°F (25°C)
The ten strips tested shall not crack when bent 90°
1 3
at a uniform speed over a rounded corner of: ⁄2-in. (12.7-mm) radius ⁄4-in. (19.1-mm) radius
Loss on heating at 221°F (105°C) for 5 h, max, % 4 4
TABLE 2 Dimensions and Masses of Asphalt-Saturated Roofing Felt
Type I Type II
Width of roll, in. (mm) 36 (914) 6 0.7 % or as agreed upon by purchaser and seller
2 2 A A
Area of roll, min, ft (m ) 216 (20.07) or 432 (40.14) 216 (20.07)
B
Moisture, at point of manufacture, max % 4.3 4.1
2 2
Net mass of saturated felt, min, lb/100 ft (g/m ) 11.5 (560) 26 (1270)
2 2 C
Mass of saturant, min, lb/100 ft (g/m ) 6.2 (303) 15.0 (732)
2 2
Mass of desaturated felt, min, lb/100 ft (g/m ) 5.2 (254) 10.0 (488)
Ash, max, % 10.0 10.0
2 2
Perforated felt, avg, area of individual hole, max, in. (mm ) 0.05 (32) .
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.
7.2 The surface of the felt shall not be coated or covered 8.2.4 Measure the size of the perf
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