Standard Test Method for
Measuring Voids in Roofing and Waterproofing Membranes1
This standard is issued under the fixed designation D 5076; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of the last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1.1 This test method includes two procedures for measuring
the area of voids in the adhesive between materials used in
roofing and waterproofing systems. Both procedures require a
count of the number of voids.
1.2 The values given in SI units are to be regarded as the
standard. The values in parentheses are for information only.
1.3 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 limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D 1079 Terminology Relating to Roofing, Waterproofing,
and Bituminous Materials2
D 2829 Practice for Sampling and Analysis of Built-up
3.1 Definitions—For definitions of terms used in this test
method, see Terminology D 1079.
4. Summary of Test Method
4.1 All voids are counted and measured. In addition, in
built-up roofing and waterproofing membrane samples, voids
may be classified into dry, glazed, uncoated, and overlying
voids (see Terminology D 1079). Count and measure only
void with at least one dimension equal to or larger than 13 mm
(0.5 in.). Smaller adhesive layer defects are not considered
4.2 The void area in each adhesive layer is estimated with
the aid of a template, or alternatively, digitized and measured
with a computer.
5. Significance and Use
5.1 This laboratory test method can be used on multi-ply
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