ASTM D6705/D6705M-04(2011)e1
(Guide)Standard Guide for the Repair and Recoat of Sprayed Polyurethane Foam Roofing Systems
Standard Guide for the Repair and Recoat of Sprayed Polyurethane Foam Roofing Systems
SIGNIFICANCE AND USE
This guide outlines general procedures and precautions necessary for correct and safe repair and recoat of SPF roofing systems.
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 the repair and recoating of existing spray polyurethane roofing systems.
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.
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´1
Designation:D6705/D6705M −04 (Reapproved 2011)
Standard Guide for
Repair and Recoat of Spray Polyurethane Foam Roofing
Systems
This standard is issued under the fixed designation D6705/D6705M; 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.
´ NOTE—Units information and the referenced CPI document were editorially revised in June 2011.
1. Scope 2.3 CPI Standard:
Center for The Polyurethane Industry (CPI), Bulletin AX
1.1 This guide covers the procedures for the repair and
119 Guide for Safe Handling and Use of Polyurethane
recoating of existing spray polyurethane roofing systems.
and Polyisocyanurate Foam Systems
1.2 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
3. Terminology
each system may not be exact equivalents; therefore, each
3.1 Definitions:
system shall be used independently of the other. Combining
3.1.1 recoat—to apply a new protective coating over an
values from the two systems may result in non-conformance
existing coated SPF (spray polyurethane foam) roof system to
with the standard.
extend the performance life of the roofing system.
1.3 This standard does not purport to address all of the
3.1.2 scarfing—to shave or grind an SPF foam surface
safety concerns, if any, associated with its use. It is the
mechanically to remove a coating, or UV deteriorated SPF, or
responsibility of the user of this standard to establish appro-
both, to refoam or recoat the surface.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Significance and Use
4.1 This guide outlines general procedures and precautions
2. Referenced Documents
necessary for correct and safe repair and recoat of SPF roofing
2.1 ASTM Standards:
systems.
C1029 Specification for Spray-Applied Rigid Cellular Poly-
4.2 This guide is not all inclusive; this guide is intended to
urethane Thermal Insulation
supplement detailed instructions from manufacturers and
D5469 Guide for Application of New Spray Applied Poly-
safety requirements required by law.
urethane Foam and Coated Roofing Systems
D6083 Specification for Liquid Applied Acrylic Coating
5. Roof Inspection Procedures and Considerations
Used in Roofing
5.1 General Considerations:
2.2 SPFA Standards:
5.1.1 The performance of a sprayed-in-place polyurethane
AY 102 A Guide for Selection of Elastomeric Protective
foam roof system can be affected by all the component parts of
Coatings Over Sprayed Polyurethane Foam
the roof structure, as well as the atmospheric conditions inside
AY 107 Spray Polyurethane Foam Blisters, Their Causes,
and outside the structure. Structural design, code compliance,
Types, Prevention and Repair
specification review, contractor, and material selection should
be considered in the repair and recoat of a spray polyurethane
1 foam roof system.
This guide is under the jurisdiction of ASTM Committee D08 on Roofing and
Waterproofing and is the direct responsibility of Subcommittee D08.06 on Spray
5.1.2 A range of spray polyurethane foam systems exists
Polyurethane Foam Roof Systems.
with various physical properties, exhibiting different tempera-
Current edition approved May 1, 2011. Published June 2011. Originally
ture limitations, and different combustibility characteristics.
approved in 2001. Last previous edition approved in 2004 as D6705 – 04. DOI:
Most published data are obtained from testing of laboratory
10.1520/D6705_D6705M-04R11E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
samples. The thickness of the polyurethane foam sprayed,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
Available from Spray Polyurethane Foam Alliance, 4400 Fair Lakes Ct., Suite Available from The Center for the Polyurethanes Industry, 1300 Wilson Blvd.,
105, Fairfax, VA 22033. Arlington, VA 22209.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
D6705/D6705M−04 (2011)
number of passes, temperature of substrate, ambient tempera- 5.5.2.8 Repairs required to soil and vent pipes, drains, roof
ture, and so forth will have an effect on all polyurethane foam hatches, equipment curbs or supports, guy wires, hot stacks,
properties. skylights, mechanical units, walkways, sleepers, pitch-pans,
5.1.3 The specifier should consult with the respective ma- and other penetration items,
5.5.2.9 Water-saturated subroofs, insulation, or polyure-
terial manufacturer of the sprayed-in-place polyurethane foam
roof system. This should include, but not be limited to, thane foam,
5.5.2.10 Subroof damage or deterioration, and
materials selection, expansion joints, flashing details, and other
items. 5.5.2.11 Areas of special consideration.
5.2 Inspection:
6. Selection of Primer
5.2.1 The preparation for the repair and recoat of a sprayed-
6.1 A primer may be required to enhance adhesion of the
in-place polyurethane foam roof system will vary according to
new coating to the existing coating. The recommendations of
the conditions of the roof and its component parts and the type
the new coating manufacturer shall be used to determine
of existing protective coating used over the polyurethane foam.
primer requirements.
5.2.2 Conduct a roof inspection to determine the repairs to
be performed and the type of materials to be used.
7. Selection of Protective Coatings
5.3 Visual Inspection:
7.1 The following must be taken into consideration when
5.3.1 Look for blisters or delaminated areas in the original
choosing a recoating material:
roof.
7.1.1 Perm rating required according to the vapor drive
5.3.2 Check the condition of the roofing system at all
potential,
flashing and termination points.
7.1.2 Compatibility with the existing roof coating,
5.3.3 Look for damage that would affect recoating of the 7.1.3 Specifier’s, or manufacturer’s, recommendations, or
roofing system.
both,
5.3.4 Check for pinholes in the polyurethane foam, or 7.1.4 Environmental conditions,
coating, or both. 7.1.5 Slope limitations, and
7.1.6 Anticipated mechanical abuse.
5.3.5 Check for exposed polyurethane foam and areas of
eroded coating.
7.2 Refer to SPFA AY 102 and Specification D6083 for
5.3.6 Check for areas of ponding water.
information on protective coatings used over SPF roofing
systems.
5.4 Physical Inspection:
5.4.1 Pe
...
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.
´1
Designation:D6705–04 Designation: D6705/D6705M – 04 (Reapproved 2011)
Standard Guide for
Repair and Recoat of Spray Polyurethane Foam Roofing
Systems
This standard is issued under the fixed designation D6705/D6705M; 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.
´ NOTE—Units information and the referenced CPI document were editorially revised in June 2011.
1. Scope
1.1 This guide covers the procedures for the repair and recoating of existing spray polyurethane roofing systems.
1.2The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
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. Referenced Documents
2.1 ASTM Standards:
C1029 Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
D5469 Guide for Application of New Spray Applied Polyurethane Foam and Coated Roofing Systems
D6083 Specification for Liquid Applied Acrylic Coating Used in Roofing
2.2 SPFA Standards:
AY 102 A Guide for Selection of Elastomeric Protective Coatings Over Sprayed Polyurethane Foam
AY 107 Spray Polyurethane Foam Blisters, Their Causes, Types, Prevention and Repair
2.3 API Standard: CPI Standard:
AllianceCenter for The Polyurethane Industry (API),(CPI), BulletinAX 119 Guide for Safe Handling and Use of Polyurethane
and Polyisocyanurate Foam Systems
3. Terminology
3.1 Definitions:
3.1.1 recoat—to apply a new protective coating over an existing coated SPF (spray polyurethane foam) roof system to extend
the performance life of the roofing system.
3.1.2 scarfing—to shave or grind an SPF foam surface mechanically to remove a coating, or UV deteriorated SPF, or both, to
refoam or recoat the surface.
4. Significance and Use
4.1 This guide outlines general procedures and precautions necessary for correct and safe repair and recoat of SPF roofing
systems.
4.2 This guide is not all inclusive; this guide is intended to supplement detailed instructions from manufacturers and safety
requirements required by law.
This guide is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.06 on Spray
Polyurethane Foam Roof Systems.
Current edition approved Dec.May 1, 2004.2011. Published December 2004.June 2011. Originally approved in 2001. Last previous edition approved in 20012004 as
D6705 – 014. DOI: 10.1520/D6705_D6705M-04R11E01.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from Spray Polyurethane Foam Alliance, 4400 Fair Lakes Ct., Suite 105, Fairfax, VA 22033.
Available from The AllianceCenter for the Polyurethanes Industry, 1300 Wilson Blvd., Arlington, VA 22209.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
´1
D6705/D6705M – 04 (2011)
5. Roof Inspection Procedures and Considerations
5.1 General Considerations:
5.1.1 The performance of a sprayed-in-place polyurethane foam roof system can be affected by all the component parts of the
roof structure, as well as the atmospheric conditions inside and outside the structure. Structural design, code compliance,
specification review, contractor, and material selection should be considered in the repair and recoat of a spray polyurethane foam
roof system.
5.1.2 A range of spray polyurethane foam systems exists with various physical properties, exhibiting different temperature
limitations, and different combustibility characteristics. Most published data are obtained from testing of laboratory samples. The
thickness of the polyurethane foam sprayed, number of passes, temperature of substrate, ambient temperature, and so forth will
have an effect on all polyurethane foam properties.
5.1.3 The specifier should consult with the respective material manufacturer of the sprayed-in-place polyurethane foam roof
system. This should include, but not be limited to, materials selection, expansion joints, flashing details, and other items.
5.2 Inspection:
5.2.1 The preparation for the repair and recoat of a sprayed-in-place polyurethane foam roof system will vary according to the
conditions of the roof and its component parts and the type of existing protective coating used over the polyurethane foam.
5.2.2 Conduct a roof inspection to determine the repairs to be performed and the type of materials to be used.
5.3 Visual Inspection:
5.3.1 Look for blisters or delaminated areas in the original roof.
5.3.2 Check the condition of the roofing system at all flashing and termination points.
5.3.3 Look for damage that would affect recoating of the roofing system.
5.3.4 Check for pinholes in the polyurethane foam, or coating, or both.
5.3.5 Check for exposed polyurethane foam and areas of eroded coating.
5.3.6 Check for areas of ponding water.
5.4 Physical Inspection:
5.4.1 Perform a nondestructive moisture survey. Follow up suspected moisture-laden areas with a moisture probe or core
samples.
5.4.2 Take slit samples of the existing system as required by the new coating manufacturer.
5.4.3 Take polyurethane foam core samples as required by the SPF, or coating manufacturer, or both.
5.5 Analyze Inspection:
5.5.1 Core and slit samples should be examined for the following characteristics:
5.5.1.1 Adhesion of polyurethane foam to the substrate,
5.5.1.2 Interlaminar adhesion of polyurethane foam,
5.5.1.3 Presence of moisture,
5.5.1.4 Adhesion of base coat to polyurethane foam,
5.5.1.5 Adhesion of top coat to base coat,
5.5.1.6 Type and condition of protective coating, and
5.5.1.7 Thickness of protective coating.
5.5.2 On a roof sketch, indicate the following items and deficiencies:
5.5.2.1 Location of core and slit samples,
5.5.2.2 Areas of pinholes,
5.5.2.3 Uncured coating,
5.5.2.4 Po
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