ASTM D5076-90(2000)e1

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e1
Designation: D 5076 – 90 (Reapproved 2000)
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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Editorially switched from English dominant to SI dominant.
1. Scope 5. Significance and Use
1.1 Thistestmethodincludestwoproceduresformeasuring 5.1 This laboratory test method can be used on multi-ply
the area of voids in the adhesive between materials used in roofing and waterproofing systems to measure, classify, and
roofing and waterproofing systems. Both procedures require a count the voids between felt plies, between insulation layers,
count of the number of voids. and between the membrane and insulation layers. Voids be-
1.2 The values given in SI units are to be regarded as the tween the felt plies or between the membrane and insulation
standard. The values in parentheses are for information only. layer in multi-ply systems can be the seeds for future blisters.
1.3 This standard does not purport to address all of the 5.2 Inone-plysystems,thistestmethodcanbeusedtocount
safety concerns, if any, associated with its use. It is the and measure the voids in the adhesive in laps and, in adhered
responsibility of the user of this standard to establish appro- systems, in the adhesive between the membrane and the
priate safety and health practices and determine the applica- insulation. Voids in the lapping adhesive can be the source of
bility of regulatory limitations prior to use. leakage while voids in the lapping adhesive or in the adhesive
between the membrane and insulation can be the seeds for
2. Referenced Documents
future blisters.
2.1 ASTM Standards:
6. Apparatus
D1079 Terminology Relating to Roofing, Waterproofing,
and Bituminous Materials 6.1 Freezer, for conditioning bituminous samples. A stan-
D2829 Practice for Sampling and Analysis of Built-up dardfreezer,suchasthatusedforstoringfrozenfoods,maybe
Roofs 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.
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built-up roofing and waterproofing membrane samples, voids
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 (see Terminology D1079). Count and measure only
Special templates can be prepared and used with lap samples,
voidswithatleastonedimensionequaltoorlargerthan13mm
or just part of the above template can be used.
(0.5 in.). Smaller adhesive layer defects are not considered
6.5 Computer Equipment and Software, for digitizing accu-
voids.
rate images, image enhancement such as background leveling,
4.2 The void area in each adhesive layer is estimated with
noise cleaning and edge sharpening, and area determination by
the aid of a template, or alternatively, digitized and measured
pixel (point of light) count.
with a computer.
7. Sampling, Test Specimens, and Test Units
7.1 Samples may be from the laboratory or the field as in
This test method is under the jurisdiction of ASTM Committee D08 on Practice D2829.
Roofing,Waterproofing,andBituminousMaterialsandisthedirectresponsibilityof
Subcommittee D08.20 on Roofing Membrane Systems.
Current edition approved June 29, 1990. Published August 1990. Software is available from the Jandel Corp., 3030 Bridgeway, Sausalito, CA
Annual Book of ASTM Standards, Vol 04.04. 94965.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 5076
2 2
7.2 Multiplysamplesmustbeatleast305mm (12i
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