ASTM D5076-90(2006)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D5076 −90(Reapproved2006)
Standard Test Method for
Measuring Voids in Roofing and Waterproofing Membranes
This standard is issued under the fixed designation D5076; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Significance and Use
5.1 This laboratory test method can be used on multi-ply
1.1 This test method includes two procedures for measuring
roofing and waterproofing systems to measure, classify, and
the area of voids in the adhesive between materials used in
roofing and waterproofing systems. Both procedures require a count the voids between felt plies, between insulation layers,
and between the membrane and insulation layers. Voids be-
count of the number of voids.
tween the felt plies or between the membrane and insulation
1.2 The values given in SI units are to be regarded as the
layer in multi-ply systems can be the seeds for future blisters.
standard. The values in parentheses are for information only.
5.2 Inone-plysystems,thistestmethodcanbeusedtocount
1.3 This standard does not purport to address all of the
and measure the voids in the adhesive in laps and, in adhered
safety concerns, if any, associated with its use. It is the
systems, in the adhesive between the membrane and the
responsibility of the user of this standard to establish appro-
insulation. Voids in the lapping adhesive can be the source of
priate safety and health practices and determine the applica-
leakage while voids in the lapping adhesive or in the adhesive
bility of regulatory limitations prior to use.
between the membrane and insulation can be the seeds for
future blisters.
2. Referenced Documents
2.1 ASTM Standards: 6. Apparatus
D1079Terminology Relating to Roofing and Waterproofing
6.1 Freezer, for conditioning bituminous samples. A stan-
D2829Practice for Sampling and Analysis of Existing
dard freezer, such as that used for storing frozen foods, may be
Built-Up Roof Systems
used provided it has the volume to loosely hold the samples to
be tested. Do not store food and condition samples in the same
3. Terminology
equipment.
3.1 Definitions—For definitions of terms used in this test
6.2 Transparent Sheets,torecordthesizeandlocationofthe
method, see Terminology D1079.
voids.Anyclear,rigidsheetthatcanbemarkedwithaflowpen
can be used.
4. Summary of Test Method
6.3 Flow Pen, or other marking device that is compatible
4.1 All voids are counted and measured. In addition, in
with the transparent sheet selected.
built-up roofing and waterproofing membrane samples, voids
2 2
6.4 Void Estimating Template—A stiff, 305-mm (12-in. )
may be classified into dry, glazed, uncoated, and overlying
transparent template with a 25.4-mm (1-in.) minimum grid.
voids(seeTerminologyD1079).Countandmeasureonlyvoids
Special templates can be prepared and used with lap samples,
with at least one dimension equal to or larger than 13 mm (0.5
or just part of the above template can be used.
in.). Smaller adhesive layer defects are not considered voids.
6.5 Computer Equipment and Software, for digitizing accu-
4.2 The void area in each adhesive layer is estimated with
rate images, image enhancement such as background leveling,
the aid of a template, or alternatively, digitized and measured
noise cleaning and edge sharpening, and area determination by
with a computer.
pixel (point of light) count.
7. Sampling, Test Specimens, and Test Units
ThistestmethodisunderthejurisdictionofASTMCommitteeD08onRoofing
and Waterproofing and is the direct responsibility of Subcommittee D08.20 on
7.1 Samples may be from the laboratory or the field as in
Roofing Membrane Systems.
Practice D2829.
Current edition approved Dec. 1, 2006. Published February 2007. Originally
´1
approved in 1990. Last previous edition approved in 2000 as D5076–90 (2000) .
DOI: 10.1520/D5076-90R06. The sole source of supply of the software known to the committee at this time
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