ASTM D6705/D6705M-04(2018)

Standard Guide for Repair and Recoat of Spray Polyurethane Foam Roofing Systems

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.
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, 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-Dec-2017
• ICS: 83.100 - Cellular materials
• ICS: 91.060.20 - Roofs
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.06 - Spray Polyurethane Foam Roof Systems

Relations

• Replaces: ASTM D6705/D6705M-04(2011)e1 - Standard Guide for the Repair and Recoat of Sprayed Polyurethane Foam Roofing Systems
• Effective Date: 01-Jan-2018
• Refers: ASTM C1029-13 - Standard Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
• Effective Date: 15-Apr-2013
• Refers: ASTM C1029-10 - Standard Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
• Effective Date: 01-Jun-2010
• Refers: ASTM C1029-09 - Standard Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
• Effective Date: 01-Nov-2009
• Refers: ASTM C1029-08 - Standard Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
• Effective Date: 01-Sep-2008
• Refers: ASTM C1029-07 - Standard Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
• Effective Date: 15-Nov-2007
• Refers: ASTM C1029-05a - Standard Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
• Effective Date: 01-Nov-2005
• Refers: ASTM D6083-05 - Standard Specification for Liquid Applied Acrylic Coating Used in Roofing
• Effective Date: 01-Apr-2005
• Refers: ASTM D6083-05e1 - Standard Specification for Liquid Applied Acrylic Coating Used in Roofing (Withdrawn 2014)
• Effective Date: 01-Apr-2005
• Refers: ASTM C1029-02 - Standard Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
• Effective Date: 10-Nov-2002
• Refers: ASTM D6083-97a - Standard Specification for Liquid Applied Acrylic Coating Used in Roofing
• Effective Date: 10-Jul-1997
• Refers: ASTM C1029-96 - Standard Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
• Effective Date: 01-Jan-1996
• Referred By: ASTM D7119/D7119M-21 - Standard Guide for Sampling Spray Polyurethane Foam and Coating in Roofing
• Effective Date: 01-Jan-2018

Overview

ASTM D6705/D6705M-04(2018): Standard Guide for Repair and Recoat of Spray Polyurethane Foam Roofing Systems is a globally recognized guide developed by ASTM International for the maintenance, repair, and recoating of existing spray polyurethane foam (SPF) roofing systems. This standard provides essential procedures, inspection methods, and safety guidelines for ensuring effective and long-lasting SPF roof repairs and recoats. It is intended to supplement manufacturer-specific instructions and meet legal safety requirements, making it a crucial reference for roofing professionals, system designers, and building owners.

Key Topics

• General Procedures and Safety
  The guide presents systematic steps and necessary precautions to ensure the correct and safe repair and recoat of SPF roofing. Users are responsible for complying with health, safety, and environmental considerations applicable by law.

• Inspection Techniques
  The standard details comprehensive inspection practices, including:

  • Visual and physical roof inspections for blisters, pinholes, or damage
  • Core sampling and moisture surveys to assess the integrity of the foam and coatings
  • Analysis of repairs needed at flashing points, penetrations, and areas experiencing ponding or mechanical stress

• Surface Preparation
  Proper cleaning, scarifying of degraded areas, removal of damaged SPF or coatings, and surface repair methods are described to maximize coating adhesion and durability.

• Selection of Materials
  Guidance is provided for selecting compatible primers, protective coatings, and SPF materials. Users are advised to consider factors such as perm rating, environmental exposure, and manufacturer recommendations.

• Coating Application
  Detailed recommendations for recoating, including minimum application thickness, multi-coat procedures, and post-application inspections to correct defects before finalization.

• Safety Practices
  Emphasizes adherence to material safety data sheets (MSDS), safe equipment handling, ventilation, and compliance with local codes and regulations.

Applications

This standard is applicable to a variety of stakeholders in the construction and facility management sectors:

• Building Owners and Facility Managers
  Ensures informed decision-making for roof asset longevity, maintenance planning, and lifecycle cost management.

• Roofing Contractors and Applicators
  Provides a reliable procedural framework, reducing warranty issues and promoting best practices for SPF roof repairs and recoating.

• System Designers and Specifiers
  Clarifies inspection, preparation, and material compatibility criteria to optimize SPF roof performance and compliance with building codes.

• Insurers and Inspectors
  Offers detailed inspection and documentation requirements to support risk assessments and claims processes involving SPF roofing systems.

Related Standards

ASTM D6705/D6705M-04(2018) references and complements several other key industry standards, including:

• ASTM C1029 - Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
• ASTM D5469/D5469M - Guide for Application of New Spray Applied Polyurethane Foam and Coated Roofing Systems
• SPFA AY 102 - Guide for Selection of Elastomeric Protective Coatings Over Sprayed Polyurethane Foam
• SPFA AY 107 - Guidance on Identifying and Repairing Polyurethane Foam Blisters
• CPI Bulletin AX119 - Guide for Safe Handling and Use of Polyurethane and Polyisocyanurate Foam Systems

By following ASTM D6705/D6705M-04(2018), professionals ensure that spray polyurethane foam roofing repairs and restorations are reliable, safe, and effective, meeting both performance goals and regulatory expectations. This standard stands as an important resource for maintaining the integrity and performance of SPF roofing systems across a wide range of climates and applications.

Standards Content (Sample)

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: D6705/D6705M −04 (Reapproved 2018)
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.
1. Scope 2.2 SPFA Standards:
AY 102 A Guide for Selection of Elastomeric Protective
1.1 This guide covers the procedures for the repair and
Coatings Over Sprayed Polyurethane Foam
recoating of existing spray polyurethane roofing systems.
AY 107 Spray Polyurethane Foam Blisters, Their Causes,
1.2 The values stated in either SI units or inch-pound units
Types, Prevention and Repair
are to be regarded separately as standard. The values stated in 5
2.3 CPI Standard:
each system may not be exact equivalents; therefore, each
Center for The Polyurethane Industry (CPI), Bulletin AX
system shall be used independently of the other. Combining
119 Guide for Safe Handling and Use of Polyurethane
values from the two systems may result in non-conformance
and Polyisocyanurate Foam Systems
with the standard.
3. Terminology
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.1 Definitions:
responsibility of the user of this standard to establish appro-
3.1.1 recoat—to apply a new protective coating over an
priate safety, health, and environmental practices and deter-
existing coated SPF (spray polyurethane foam) roof system to
mine the applicability of regulatory limitations prior to use.
extend the performance life of the roofing system.
1.4 This international standard was developed in accor-
3.1.2 scarfing—to shave or grind an SPF foam surface
dance with internationally recognized principles on standard-
mechanically to remove a coating, or UV deteriorated SPF, or
ization established in the Decision on Principles for the
both, to refoam or recoat the surface.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Significance and Use
Barriers to Trade (TBT) Committee.
4.1 This guide outlines general procedures and precautions
necessary for correct and safe repair and recoat of SPF roofing
2. Referenced Documents
systems.
2.1 ASTM Standards:
4.2 This guide is not all inclusive; this guide is intended to
C1029 Specification for Spray-Applied Rigid Cellular Poly-
supplement detailed instructions from manufacturers and
urethane Thermal Insulation
safety requirements required by law.
D5469/D5469M Guide for Application of New Spray Ap-
plied Polyurethane Foam and Coated Roofing Systems
5. Roof Inspection Procedures and Considerations
D6083 Specification for Liquid Applied Acrylic Coating
5.1 General Considerations:
Used in Roofing (Withdrawn 2014)
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
This guide is under the jurisdiction of ASTM Committee D08 on Roofing and
and outside the structure. Structural design, code compliance,
Waterproofing and is the direct responsibility of Subcommittee D08.06 on Spray
specification review, contractor, and material selection should
Polyurethane Foam Roof Systems.
be considered in the repair and recoat of a spray polyurethane
Current edition approved Jan. 1, 2018. Published January 2018. Originally
approved in 2001. Last previous edition approved in 2011 as D6705/D6705M – 04
foam roof system.
ε1
(2011) . DOI: 10.1520/D6705_D6705M-04R18.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available from Spray Polyurethane Foam Alliance, 4400 Fair Lakes Ct., Suite
the ASTM website. 105, Fairfax, VA 22033.
3 5
The last approved version of this historical standard is referenced on Available from The Center for the Polyurethanes Industry, 1300 Wilson Blvd.,
www.astm.org. Arlington, VA 22209.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6705/D6705M − 04 (2018)
5.1.2 A range of spray polyurethane foam systems exists 5.5.2.6 Poor drainage,
with various physical properties, exhibiting different tempera- 5.5.2.7 Repairs required for foamstops, parapet walls,
ture limitations, and different combustibility characteristics. gutters, scuppers, edge-termination details, expansion joints,
Most published data are obtained from testing of laboratory counterflashing, and other perimeter items,
samples. The thickness of the polyurethane foam sprayed, 5.5.2.8 Repairs required to soil and vent pipes, drains, roof
number of passes, temperature of substrate, ambient hatches, equipment curbs or supports, guy wires, hot stacks,
temperature, and so forth will have an effect on all polyure- skylights, mechanical units, walkways, sleepers, pitch-pans,
thane foam properties. and other penetration items,
5.1.3 The specifier should consult with the respective ma- 5.5.2.9 Water-saturated subroofs, insulation, or polyure-
terial manufacturer of the sprayed-in-place polyurethane foam thane foam,
roof system. This should include, but not be limited to, 5.5.2.10 Subroof damage or deterioration, and
materials selection, expansion joints, flashing details, and other 5.5.2.11 Areas of special consideration.
items.
6. Selection of Primer
5.2 Inspection:
6.1 A primer may be required to enhance adhesion of the
5.2.1 The preparation for the repair and recoat of a sprayed-
new coating to the existing coating. The recommendations of
in-place polyurethane foam roof system will vary according to
the new coating manufacturer shall be used to determine
the conditions of the roof and its component parts and the type
primer requirements.
of existing protective coating used over the polyurethane foam.
5.2.2 Conduct a roof inspection to determine the repairs to
7. Selection of Protective Coatings
be performed and the type of materials to be used.
7.1 The following must be taken into consideration when
5.3 Visual Inspection:
choosing a recoating material:
5.3.1 Look for blisters or delaminated areas in the original
7.1.1 Perm rating required according to the vapor drive
roof.
potential,
5.3.2 Check the condition of the roofing system at all
7.1.2 Compatibility with the existing roof coating,
flashing and termination points.
7.1.3 Specifier’s, or manufacturer’s, recommendations, or
5.3.3 Look for damage that would affect recoating of the
both,
roofing system.
7.1.4 Environment
...