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ASTM D7281-07

(Test Method)

Standard Test Method for Determining Water Migration Resistance Through Roof Membranes

Standard Test Method for Determining Water Migration Resistance Through Roof Membranes

SIGNIFICANCE AND USE
This test method provides a means of evaluating roof membranes, seams, and laps for resistance to water migration from standing water on the roof. This test method evaluates roof membranes when first applied and also after simulated deterioration caused by the ultraviolet energy of the sun.
SCOPE
1.1 This test method covers the determination of water migration resistance of roof membranes including built-up roof membranes, modified bitumen, and single ply roof membranes. The procedures were developed to determine the potential for leakage of water through the roof membranes resulting from a standing head of water and when pressurized with air from the underside.
1.2 The values stated in SI units are to be regarded as the standard. The values given 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.

General Information

Status
Historical
Publication Date
30-Apr-2007
ICS
91.100.50 - Binders. Sealing materials
Technical Committee
D08 - Roofing and Waterproofing
Drafting Committee
D08.20 - Roofing Membrane Systems
Current Stage
Ref Project

Relations

Referred By
ASTM D7832/D7832M-14(2021) - Standard Guide for Performance Attributes of Waterproofing Membranes Applied to Below-Grade Walls / Vertical Surfaces (Enclosing Interior Spaces)
Effective Date
01-May-2007

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ASTM D7281-07 - Standard Test Method for Determining Water Migration Resistance Through Roof Membranes
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D7281 − 07
StandardTest Method for
Determining Water Migration Resistance Through Roof
Membranes
This standard is issued under the fixed designation D7281; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.4 field seam—a splice made in the field of a single ply
membrane that joins two sheets together using an adhesive,
1.1 This test method covers the determination of water
splicing tape, heat, or solvent-welding.
migrationresistanceofroofmembranesincludingbuilt-uproof
3.1.5 mechanically fastened membranes—a single ply or
membranes,modifiedbitumen,andsingleplyroofmembranes.
baseply(partofamulti-layersystem)membranethathasbeen
The procedures were developed to determine the potential for
positively attached at intervals to the substrate, usually with
leakage of water through the roof membranes resulting from a
fasteners and/or other mechanical devices, such as battens.
standing head of water and when pressurized with air from the
underside.
3.1.6 NPT—National Pipe Thread.
1.2 The values stated in SI units are to be regarded as the
4. Summary of Test Method
standard. The values given in parentheses are for information
4.1 Roofing membranes are conditioned and installed in the
only.
leakagetestapparatus(Fig.1).A152-mm(6-in.)headofwater
1.3 This standard does not purport to address all of the
ismaintainedoverthesamplefor7daysatambientconditions,
safety concerns, if any, associated with its use. It is the
21°C (70°F). At the end of the 7 day period, air shall be
responsibility of the user of this standard to establish appro-
introduced into the bottom section of the apparatus, increasing
priate safety and health practices and determine the applica-
the pressure to 6.9 kPa (1 psig) and immediately released to
bility of regulatory limitations prior to use.
ambient conditions. This cycle is repeated 25 times.
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
5.1 This test method provides a means of evaluating roof
G154 PracticeforOperatingFluorescentLightApparatusfor
membranes, seams, and laps for resistance to water migration
UV Exposure of Nonmetallic Materials
from standing water on the roof. This test method evaluates
roof membranes when first applied and also after simulated
3. Terminology
deterioration caused by the ultraviolet energy of the sun.
3.1 Definitions:
3.1.1 adhere—to cause two surfaces to be held together by
6. Apparatus
adhesion. Roof membranes are often “partially-” or “totally-
6.1 The test apparatus consists of top section, a support
adhered” to a substrate.
plate, and a bottom section, which are clamped together with
3.1.2 batten—anarrowbandorplatethatisusedtofastenor
the sample being evaluated placed as a diaphragm between the
prevent the displacement of a single ply membrane.
top sections and the support plate.
3.1.3 delamination—separation between lamination or 6.1.1 The top section consists of a 203-mm (8-in.) diameter,
bonded material or component; for example, laminated layers 6-mm ( ⁄4-in.) wall thickness × 203-mm (8-in.) length of clear
of rigid insulation or the felt plies in a built-up roof. acrylic pipe, which is cemented to a 305-mm (12-in.) diameter
flange.
6.1.2 Thesupportplateisaroundpoly(vinylchloride)plate,
ThistestmethodisunderthejurisdictionofASTMCommitteeD08onRoofing
1 1
6-mm ( ⁄4-in.) thick and a 241-mm (9 ⁄2-in.) diameter with
and Waterproofing and is the direct responsibility of Subcommittee D08.20 on
6-mm ( ⁄4-in.) diameter holes spaced 25 mm (1 in.) on center.
Roofing Membrane Systems.
6.1.3 The bottom section consists of a 305-mm (12-in.)
Current edition approved May 1, 2007. Published June 2007. DOI: 10.1520/
D7281-07.
diameter flange attached to a 203-mm (8-in.) diameter, 6-mm
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
( ⁄4-in.) wall thickness × 152-mm (6-in.) length of clear acrylic
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
pipe,whichisfabricatedwithtwothreadedholes6mm( ⁄4in.)
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. NPT. These holes are used after the test apparatus sections are
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7281 − 07
FIG. 1 Leakage Test Apparatus
clamped together, with the roof cover between them. One hole 6.1.4 The gasket material consists of a non-absorben
...

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