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ASTM D7120/D7120M-10(2022)

(Guide)

Standard Guide for Evaluation and Preparation of Roof Membranes for Coating Application

Standard Guide for Evaluation and Preparation of Roof Membranes for Coating Application

SIGNIFICANCE AND USE
3.1 This guide outlines the general procedures necessary to evaluate and prepare a roof membrane for the application of a liquid surface coating.  
3.2 This guide is not all inclusive; this guide is intended to supplement detailed instructions from manufacturers and safety requirements required by law.
SCOPE
1.1 This guide covers the procedures for evaluating and preparing non-aggregate surfaced membranes for the application of a coating. It does not address design, construction, or installation issues regarding the roof assembly or the roof membrane. It is not an application guide for roof coatings.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Oct-2022
ICS
25.220.10 - Surface preparation
Technical Committee
D08 - Roofing and Waterproofing
Drafting Committee
D08.20 - Roofing Membrane Systems
Current Stage
Ref Project

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ASTM D7120/D7120M-10(2022) - Standard Guide for Evaluation and Preparation of Roof Membranes for Coating ApplicationASTM D7120/D7120M-10(2022) - Standard Guide for Evaluation and Preparation of Roof Membranes for Coating Application
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ASTM D7120/D7120M-10(2022) - Standard Guide for Evaluation and Preparation of Roof Membranes for Coating Application
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7120/D7120M − 10 (Reapproved 2022)
Standard Guide for
Evaluation and Preparation of Roof Membranes for Coating
Application
This standard is issued under the fixed designation D7120/D7120M; 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 top surface of a roof. Surface contaminants come from one of
thefollowingsources:(1)particulateandliquidemissionsfrom
1.1 This guide covers the procedures for evaluating and
building interior operations, (2) airborne vegetable and mineral
preparing non-aggregate surfaced membranes for the applica-
particles, and (3) oils, greases, and chemicals from industrial
tion of a coating. It does not address design, construction, or
and food service operations.
installation issues regarding the roof assembly or the roof
membrane. It is not an application guide for roof coatings.
2.2.2 chemical barrier, n—a barrier formed by reactive
materials either acid, alkali, or solvent, which inhibits the
1.2 The values stated in either SI units or inch-pound units
adhesion of surface coatings.
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
2.2.3 exudate, n—a glossy film that forms on the surface of
system shall be used independently of the other. Combining
an atactic polypropylene (APP) membrane. Exudates inhibit
values from the two systems may result in nonconformance
coating adhesion and they can bleed through and stain the
with the standard.
coating surface.
1.3 This standard does not purport to address all of the
2.2.4 loose mineral granules, n—see mineral granules,
safety concerns, if any, associated with its use. It is the
disattached mineral granules.
responsibility of the user of this standard to establish appro-
2.2.5 moisture, n—surfaces to be coated must be clean and
priate safety, health, and environmental practices and deter-
dry.
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
2.2.6 organic barrier, n—see organic, any of several bio-
dance with internationally recognized principles on standard-
logical growths, usually algae or fungus, which act as a barrier
ization established in the Decision on Principles for the
between an APP roof membrane and a coating.
Development of International Standards, Guides and Recom-
2.2.7 release and/or anti-block agent, n—see parting agent,
mendations issued by the World Trade Organization Technical
any of several mineral or waxy materials which are typically
Barriers to Trade (TBT) Committee.
applied to an APP sheet during the manufacturing process to
2. Terminology
prevent the sheet from sticking to itself while in the roll.
2.1 Definitions:
2.2.8 surface oxidate, n—a barrier film, which forms on the
2.1.1 adequate drainage, n—the drainage condition in
surfaceofanunprotectedsmoothAPPsheetduringweathering.
which consideration has been made for all loading deflections
of the deck, and additional roof slope has been provided to
3. Significance and Use
ensure drainage of the roof area within 48 h of rainfall.
3.1 This guide outlines the general procedures necessary to
2.1.2 contaminant, n—any substance which will adversely
evaluate and prepare a roof membrane for the application of a
affect the adhesion of a coating.
liquid surface coating.
2.2 Contaminant List:
3.2 This guide is not all inclusive; this guide is intended to
2.2.1 air/water-borne surface contaminant, n—any of sev-
supplement detailed instructions from manufacturers and
eral types of external source contaminants that accumulate on
safety requirements required by law.
This guide is under the jurisdiction of ASTM Committee D08 on Roofing and
4. General Surface Conditions
Waterproofing and is the direct responsibility of Subcommittee D08.20 on Roofing
Membrane Systems.
4.1 Lackofadequatedrainagewillhaveanadverseeffecton
Current edition approved Nov. 1, 2022. Published November 2022. Originally
roof components and will lead to premature failure of liquid-
approved in 2010. Last previous edition approved in 2017 as D7120/D7120M – 10
(2017). DOI: 10.1520/D7120_D7120M-10R22. applied coatings.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7120/D7120M − 10 (2022)
4.2 It is important to determine the area(s) affected by usually a high concentration of dust, dirt, and debris in areas
adverse surface conditions. Specific surface preparation op- where water has ponded.
tions can be determined after the membrane has been evaluated
6. Preparation of the Surface
and subsequent adhesion tests performed.
6.1 Remove contaminants prior to coating. The following
4.3 Multiplesurfacepreparationtechniquesmayberequired
treatments offer different methods of preparing the membrane
to prepare the surface of an APP modified bitumen to receive
surfaces to receive the coating. The roof must be inspected
a coating.
prior to performing any of the following surface preparations.
5. Roof Surface Evaluation If not properly executed, some of these treatments can damage
the membrane.
5.1 The roof membrane surf
...

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This specification covers the requirements and corresponding test methods for vapor-degreasing grade perchloroethylene. When tested, materials shall conform to the following physical properties: specific gravity; distillation range (initial boiling point and dry point); acidity as HCl; alkalinity as NaOH; water content; appearance; color in Pt-co units; halides content; nonvolatile residues content; acid acceptance; and copper corrosion behavior.
SCOPE
1.1 This specification covers vapor-degreasing grade perchloroethylene.2
Note 1: Guide D3844 and Practice D4276 provide additional important information on solvent properties.  
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