ASTM D1668-97a

Standard Specification for Glass Fabrics (Woven and Treated) for Roofing and Waterproofing

SCOPE
1.1 This specification covers finished treated (coated) woven-glass fabrics coated with either asphalt, coal-tar pitch or an organic resin compatible with the roofing, waterproofing, or other usage as specified by the purchaser.  
1.2 The values stated within this document are in inch-pound units with the metre equivalent in parentheses. The values given in parentheses are for information only.

General Information

• Status: Historical
• Publication Date: 09-Jul-1997
• ICS: 59.080.40 - Coated fabrics
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.04 - Felts, Fabrics and Bituminous Sheet Materials

Relations

• Replaced By: ASTM D1668-97a(2006) - Standard Specification for Glass Fabrics (Woven and Treated) for Roofing and Waterproofing
• Effective Date: 15-Jan-2006

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 1668 – 97a
Standard Specification for
Glass Fabrics (Woven and Treated) for Roofing and
Waterproofing
This standard is issued under the fixed designation D 1668; 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. This specification replaces Federal Specification
HH-C-466.
1. Scope 4.2 Type II, Coal Tar Pitch Treated—Type II is suitable for
usewithallcoaltarpitchesandcoaltarpitchbasedcompounds
1.1 This specification covers finished treated (coated)
(Note 1).
woven-glassfabricscoatedwitheitherasphalt,coal-tarpitchor
4.3 Type III, Organic Resin Treated—The purchaser and
an organic resin compatible with the roofing, waterproofing, or
supplier shall agree on an organic resin that is compatible with
other usage as specified by the purchaser.
or is suitable for, or both, the plying liquid plying materials
1.2 The values stated within this document are in inch-
either specified or to be used. This organic resin shall not be
pound units with the metre equivalent in parentheses. The
water soluble.
values given in parentheses are for information only.
NOTE 1—In some instances the purchaser may specify the use of Types
2. Referenced Documents
I or II for systems using other than coal tar bitumens or asphalt.
2.1 ASTM Standards:
5. Materials and Manufacture
D 123 Terminology Relating to Textiles
D 146 Test Methods for Sampling and Testing Bitumen- 5.1 The untreated (greige) scrim (open basket weave) or
Saturated Felts and Woven Fabrics for Roofing and Wa- leno (locked weave) fabrics shall conform to the requirements
terproofing as specified in Table 1.
D 579 Specification for Greige Woven Glass Fabrics 5.2 In the process of manufacture, the fibers of the untreated
D 1079 Terminology Relating to Roofing, Waterproofing, glass fabric shall be thoroughly and uniformly coated using
and Bituminous Materials equipment which, in combination, handles the fabric and uses
D 3775 Test Method for Fabric Count of Woven Fabric a machine speed in a total process that will not injure or distort
D 3776 Test Methods for Mass per Unit Area (Weight) of the weave of the fabric.
Woven Fabric 5.3 Glass fabric is usually woven in nominal widths of 36,
72 and 108 in. (0.91, 1.83 and 2.74 m) by the weaving mills.
3. Terminology
Extra warp (the length of the fabric) threads are included in 72
3.1 Definitions—For definitions of terms used in this speci- and 108–in. (1.83 and 2.74–m) wide fabrics to obtain incre-
fication, refer to Terminology D 123 or D 1079.
mental fabric roll widths of 36 in. (0.91m). These extra warp
threads with a slitting space between each set (a set of two) of
4. Classification of Fabric Treatments with Generally
bunched warp threads create a duplicate or “dupe” selvedge
Applicable Usage
witha“brush”edgecreatedbythecutfillthreadsinsteadofthe
4.1 Type I, Asphalt Treated—Type I is suitable for use with
usually wrapped fill threads seen in a smooth selvedge. This
all asphalts and asphalt based compounds.
type of fabric selvedge edge is, and has been, an acceptable
fabric design (pattern) in both the weaving and construction
industry.
This specification is under the jurisdiction of ASTM Committee D-8 on
5.4 Brush edge of the “dupe” selvedge is not to be included
Roofing, Waterproofing and Bituminous Materials and is the direct responsibility of
in the measurement of the finished roll width.
Subcommittee D08.04 on Felts and Fabrics.
Current edition approved July 10, 1997. Published March 1998. Originally
5.5 The purchaser may specify widths of more than or less
published as D 1668 – 59 T. Last previous edition D 1668 – 97.
than 36 in. (0.91 m). These widths can be furnished at the
Annual Book of ASTM Standards, Vol 07.01.
3 manufacturer’s option.
Annual Book of ASTM Standards, Vol 04.04.
Annual Book of ASTM Standards, Vol 07.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 1668
TABLE 1 Requirements of Untreated Woven Glass Fabrics Types
A B C
Style Scrim Leno
20 by 20 Thread Type 20 by 10 Thread Type 10 by 10 Thread Type
2 2
Average dry mass, oz/yd (g/m ): 1.4 (47) 1.4 (47) 1.4 (470
Thread count per 1 in. (25.4 mm):
D
Warp Threads: 20 6 2 150 1/0 20 6 2 150 1/0 20 6 2 150 1/0
E
Filling Threads: 20 6 2 150 1/0 10 61751/0 10 61751/0
A
“Style” (that is, 20 by 10) as stated as a caption in Table 1 is a weave count of the threads (yarns) present in both the warp and the fill. “Style” is mentioned here for
use as a quick, generic cross reference to the manufacturer’s own fabric numbers.
B
A scrim type fabric is an open weave (basket or screen) type pattern.
C
The style called “leno” has the same thread count as the 20 by 10. The change in the weave pattern is due to the doubling of the 150 1/0 warp threads (yarns) to
produce mesh copenings double the size of the 20 by 20 weave patern. As a greige goods, it is a very stable (locked) weave which continues after the applicationofthe
coating materials.
D
Warp threads (yarns) run the length of the fabric. The warp thread count is measured across the width of the fabric and is expressed in number of threads per lineal
inch or per lineal millimetre (mm).
E
Fill (woof) are the threads (yarns) that run at right angles (perpendicular) to the warp yarns of the fabric. The fill thread count is measured across the length of the fabric
and is expressed in number of threads per lineal inch or per lineal millimetre (mm).
6. Physical Properties 7.3 Selvage—The selvage of the fabric shall have a mini-
mum number of warp threads (yarns) to comprise a width of ⁄4
6.1 Coated Fabric—The coated fabric shall conform to the
in. (6 mm) and a maximum of ⁄2 in. (13 mm).
requirementsasspecifiedinTable2.Thecoatedfabricshallnot
flake at 32°F (0°C) when flexed 180° over 1 in. (25 mm)
8. Sampling and Test Methods
outside diameter mandrel and then immediately reversed.
6.2 Finished Fabric—The finished fabric shall be capable
8.1 Sampling—Sampling shall be in accordance with Test
of retaining its original shape and shall consist of a right angle
Methods D 146, paragraph 3.1.
weave set pattern without bunching either the warp or fill
8.2 Strength of Fabric—Stre
...