ASTM D7120/D7120M-10(2017)
(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 non-conformance 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 and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D7120/D7120M − 10 (Reapproved 2017)
Standard Guide for
Evaluation and Preparation of Roof Membranes for Coating
1
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 2.2.2 chemical barrier, n—a barrier formed by reactive
materials either acid, alkali, or solvent, which inhibits the
1.1 This guide covers the procedures for evaluating and
adhesion of surface coatings.
preparing non-aggregate surfaced membranes for the applica-
2.2.3 exudate, n—a glossy film that forms on the surface of
tion of a coating. It does not address design, construction, or
an atactic polypropylene (APP) membrane. Exudates inhibit
installation issues regarding the roof assembly or the roof
coating adhesion and they can bleed through and stain the
membrane. It is not an application guide for roof coatings.
coating surface.
1.2 The values stated in either SI units or inch-pound units
2.2.4 loose mineral granules, n—see mineral granules,
are to be regarded separately as standard. The values stated in
disattached mineral granules.
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
2.2.5 moisture, n—surfaces to be coated must be clean and
values from the two systems may result in non-conformance
dry.
with the standard.
2.2.6 organic barrier, n—see organic, any of several bio-
1.3 This standard does not purport to address all of the logical growths, usually algae or fungus, which act as a barrier
safety concerns, if any, associated with its use. It is the between an APP roof membrane and a coating.
responsibility of the user of this standard to establish appro-
2.2.7 release and/or anti-block agent, n—see parting agent,
priate safety and health practices and determine the applica-
any of several mineral or waxy materials which are typically
bility of regulatory limitations prior to use.
applied to an APP sheet during the manufacturing process to
prevent the sheet from sticking to itself while in the roll.
2. Terminology
2.2.8 surface oxidate, n—a barrier film, which forms on the
2.1 Definitions:
surfaceofanunprotectedsmoothAPPsheetduringweathering.
2.1.1 adequate drainage, n—the drainage condition in
which consideration has been made for all loading deflections
3. Significance and Use
of the deck, and additional roof slope has been provided to
3.1 This guide outlines the general procedures necessary to
ensure drainage of the roof area within 48 h of rainfall.
evaluate and prepare a roof membrane for the application of a
2.1.2 contaminant, n—any substance which will adversely
liquid surface coating.
effect the adhesion of a coating.
3.2 This guide is not all inclusive; this guide is intended to
2.2 Contaminant List:
supplement detailed instructions from manufacturers and
2.2.1 air/water-borne surface contaminant, n—any of sev-
safety requirements required by law.
eral types of external source contaminants that accumulate on
4. General Surface Conditions
top surface of a roof. Surface contaminants come from one of
thefollowingsources:(1)particulateandliquidemissionsfrom
4.1 Lack of adequate drainage will have an adverse effect on
building interior operations, (2) airborne vegetable and mineral
roof components and will lead to premature failure of liquid
particles, and (3) oils, greases, and chemicals from industrial
applied coatings.
and food service operations.
4.2 It is important to determine the area(s) affected by
adverse surface conditions. Specific surface preparation op-
tions can be determined after the membrane has been evaluated
1
This guide is under the jurisdiction of ASTM Committee D08 on Roofing and
and subsequent adhesion tests performed.
Waterproofing and is the direct responsibility of Subcommittee D08.20 on Roofing
Membrane Systems.
4.3 Multiple surface preparation techniques may be required
Current edition approved Jan. 1, 2017. Published January 2017. Originally
to prepare the surface of an APP modified bitumen to receive
approved in 2010. Last previous edition approved in 2010 as D7120/D7120M – 10.
DOI: 10.1520/D7120_D7120M-10R17. a coating.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7120/D7120M − 10 (2017)
5. Roof Surface Evaluation 6. Preparation of the Surface
6.1 Remove contaminants prior to coating. The following
5.1 The roof membrane surface evaluation shall be con-
treatments offer different methods of preparing the membrane
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7120/D7120M − 10 D7120/D7120M − 10 (Reapproved 2017)
Standard Guide for
Evaluation and Preparation of Roof Membranes for Coating
1
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
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 non-conformance 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Terminology
2.1 Definitions:
2.1.1 adequate drainage, n—the drainage condition in which consideration has been made for all loading deflections of the
deck, and additional roof slope has been provided to ensure drainage of the roof area within 48 h of rainfall.
2.1.2 contaminant, n—any substance which will adversely effect the adhesion of a coating.
2.2 Contaminant List:
2.2.1 air/water-borne surface contaminant, n—any of several types of external source contaminants that accumulate on top
surface of a roof. Surface contaminants come from one of the following sources: (1) particulate and liquid emissions from building
interior operations, (2) airborne vegetable and mineral particles, and (3) oils, greases, and chemicals from industrial and food
service operations.
2.2.2 chemical barrier, n—a barrier formed by reactive materials either acid, alkali, or solvent, which inhibits the adhesion of
surface coatings.
2.2.3 exudate, n—a glossy film that forms on the surface of an atactic polypropylene (APP) membrane. Exudates inhibit coating
adhesion and they can bleed through and stain the coating surface.
2.2.4 loose mineral granules, n—see mineral granules, disattached mineral granules.
2.2.5 moisture, n—surfaces to be coated must be clean and dry.
2.2.6 organic barrier, n—see organic, , any of several biological growths, usually algae or fungus, which act as a barrier
between an APP roof membrane and a coating.
2.2.7 release and/or anti-block agent, n—see parting agent, any of several mineral or waxy materials which are typically
applied to an APP sheet during the manufacturing process to prevent the sheet from sticking to itself while in the roll.
2.2.8 surface oxidate, n—a barrier film, which forms on the surface of an unprotected smooth APP sheet during weathering.
3. 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.
1
This guide is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.20 on Roofing
Membrane Systems.
Current edition approved July 1, 2010Jan. 1, 2017. Published July 2010January 2017. Originally approved in 2010. Last previous edition approved in 2010 as
D7120/D7120M – 10. DOI: 10.1520/D7120_D7120M-10.10.1520/D7120_D7120M-10R17.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7120/D7120M − 10 (2017)
3.2 This guide is not all inclusive; this guide is intended to supplement detailed instructions from manufacturers and safety
requirements required by law.
4. General Surface Conditions
4.1 Lack of adequate drainage will have an adverse effect on roof components and will lead to premature failure of liquid
applied coatings.
4.2 It is important to determine the area(s) affected by adverse surface conditions. Specific surface preparation options can be
determined after the membrane has been evaluated and subsequent adhesion tests performed.
4.3 Multiple
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.