ASTM D6705-01

Standard Guide for the Repair and Recoat of Sprayed Polyurethane Foam Roofing Systems

SCOPE
1.1 This specification guide covers the procedures for the repair and recoating of existing sprayed polyurethane roofing systems.
1.2 S.I. units are used throughout the document. Inch/pound units are in parentheses.
1.3 This standard does not address all of the safety concerns associated with its application or 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: 09-Aug-2001
• 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

• Replaced By: ASTM D6705-04 - Standard Guide for the Repair and Recoat of Sprayed Polyurethane Foam Roofing Systems
• Effective Date: 01-Dec-2004

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D 6705 – 01
Standard Guide for
the Repair and Recoat of Sprayed Polyurethane Foam
Roofing Systems
This standard is issued under the fixed designation D 6705; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 recoat—to apply a new protective coating over an
existing coated SPF (spray polyurethane foam) roof system to
1.1 This specification guide covers the procedures for the
extend the performance life of the roofing system.
repair and recoating of existing sprayed polyurethane roofing
3.1.2 scarfing—to shave or grind an SPF foam surface
systems.
mechanically to remove a coating, or UV deteriorated SPF, or
1.2 S.I. units are used throughout the document. Inch/pound
both, to refoam or recoat the surface.
units are in parentheses.
1.3 This standard does not address all of the safety concerns
4. Significance and Use
associated with its application or use. It is the responsibility of
4.1 This guide outlines general procedures and precautions
the user of this standard to establish appropriate safety and
necessary for correct and safe repair and recoat of SPF roofing
health practices and determine the applicability of regulatory
systems.
limitations prior to use.
4.2 This guide is not all inclusive; this guide is intended to
2. Referenced Documents supplement detailed instructions from manufacturers and
safety requirements required by law.
2.1 ASTM Standards:
C 1029 Specification for Spray-Applied Rigid Cellular
5. Roof Inspection Procedures and Considerations
Polyurethane Thermal Insulation
5.1 General Considerations:
D 5469 Guide for the Application of New Spray Applied
3 5.1.1 The performance of a sprayed-in-place polyurethane
Polyurethane Foam and Coated Roofing Systems
foam roof system can be affected by all the component parts of
D 6083 Specification for Liquid Applied Acrylic Coating
3 the roof structure, as well as the atmospheric conditions inside
Used In Roofing
and outside the structure. Structural design, code compliance,
2.2 SPFA Standards:
specification review, contractor, and material selection should
AY 102 A Guide for Selection of Elastomeric Protective
4 be considered in the repair and recoat of a spray polyurethane
Coatings Over Sprayed Polyurethane Foam
foam roof system.
AY 107 Spray Polyurethane Foam Blisters, Their Causes,
4 5.1.2 A range of spray polyurethane foam systems exists
Types, Prevention and Repair
with various physical properties, exhibiting different tempera-
2.3 API Standard:
ture limitations, and different combustibility characteristics.
Alliance for The Polyurethane Industry (API), Bulletin AX
Most published data are obtained from testing of laboratory
119, Guide for Safe Handling and Use of Polyurethane
5 samples. The thickness of the polyurethane foam sprayed,
and Polyisocyanurate Foam Systems
number of passes, temperature of substrate, ambient tempera-
3. Terminology ture, and so forth will have an effect on all polyurethane foam
properties.
3.1 Definitions:
5.1.3 The specifier should consult with the respective ma-
terial manufacturer of the sprayed-in-place polyurethane foam
This guide is under the jurisdiction of ASTM Committee D08 on Roofing, roof system. This should include, but not be limited to,
Waterproofing, and Bituminous Materials and is the direct responsibility of
materials selection, expansion joints, flashing details, and other
Subcommittee D08.06 on Spray Polyurethane Foam Roof Systems.
items.
Current edition approved Aug. 10, 2001. Published October 2001.
5.2 Inspection:
Annual Book of ASTM Standards, Vol 04.06.
Annual Book of ASTM Standards, Vol 04.04.
5.2.1 The preparation for the repair and recoat of a sprayed-
Available from Spray Polyurethane Foam Alliance, 1300 Wilson Blvd., Suite
in-place polyurethane foam roof system will vary according to
800, Arlington, VA 22209.
the conditions of the roof and its component parts and the type
Available from TheAlliance for the Polyurethane Industry, 1300 Wilson Blvd.,
Suite 800, Arlington, VA 22209. of existing protective coating used over the polyurethane foam.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6705–01
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 Environmental conditions,
5.3.4 Check for pinholes in the polyurethane foam, or
7.1.5 Slope limitations, and
coating, or both. 7.1.6 Anticipated mechanical abuse.
5.3.5 Check for exposed polyurethane foam and areas of 7.2 Refer to SPFA AY 102 and Specification D 6083 for
eroded coating. information on protective coatings used over SPF roofing
5.3.6 Check for areas of ponding water. systems.
5.4 Physical Inspection:
8. Selection of the Polyurethane Foam System
5.4.1 Perform a nondestructive moisture survey. Follow up
suspected moisture-laden areas with a moisture probe or core
8.1 New applied spray polyurethane foam must be compat-
samples.
ible with the existing system and comply with polyurethane
5.4.2 Take slit samples of the existing system as required by
foam Type III or IV, as defined in Specification C 1029.
the new coating manufacturer.
5.4.3 Take polyurethane foam core samples as required by
9. Execution
the SPF, or coating manufacturer, or both.
9.1 General:
5.5 Analyze Inspection:
9.1.1 The polyurethane foam and coating shall be applied in
5.5.1 Core and slit samples should be examined for the
compliance with Guide D 5469.
following characteristics:
9.2 Surface Preparation and Repair:
5.5.1.1 Adhesion of polyurethan
...