ASTM D6705-04

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 SI units are to be regarded as the standard. The values in parentheses are for information only.
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

• Status: Historical
• Publication Date: 30-Nov-2004
• 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 D6705-01 - Standard Guide for the Repair and Recoat of Sprayed Polyurethane Foam Roofing Systems
• Effective Date: 01-Dec-2004
• Replaced By: ASTM D6705/D6705M-04(2011)e1 - Standard Guide for the Repair and Recoat of Sprayed Polyurethane Foam Roofing Systems
• Effective Date: 01-May-2011

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D6705 – 04
Standard Guide for
Repair and Recoat of Spray Polyurethane Foam Roofing
1
Systems
This standard is issued under the fixed designation D6705; 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 3. Terminology
1.1 This guide covers the procedures for the repair and 3.1 Definitions:
recoating of existing spray polyurethane roofing systems. 3.1.1 recoat—to apply a new protective coating over an
1.2 The values stated in SI units are to be regarded as the existing coated SPF (spray polyurethane foam) roof system to
standard. The values in parentheses are for information only. 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-
4. Significance and Use
bility of regulatory limitations prior to 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
2.1 ASTM Standards: systems.
C1029 SpecificationforSpray-AppliedRigidCellularPoly- 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
5. Roof Inspection Procedures and Considerations
D6083 Specification for Liquid Applied Acrylic Coating
Used in Roofing 5.1 General Considerations:
3
2.2 SPFA Standards: 5.1.1 The performance of a sprayed-in-place polyurethane
foam roof system can be affected by all the component parts of
AY 102 A Guide for Selection of Elastomeric Protective
Coatings Over Sprayed Polyurethane Foam the roof structure, as well as the atmospheric conditions inside
and outside the structure. Structural design, code compliance,
AY 107 Spray Polyurethane Foam Blisters, Their Causes,
Types, Prevention and Repair specification review, contractor, and material selection should
4
be considered in the repair and recoat of a spray polyurethane
2.3 API Standard:
Alliance for The Polyurethane Industry (API), Bulletin AX foam roof system.
5.1.2 A range of spray polyurethane foam systems exists
119 Guide for Safe Handling and Use of Polyurethane
and Polyisocyanurate Foam Systems with various physical properties, exhibiting different tempera-
ture limitations, and different combustibility characteristics.
Most published data are obtained from testing of laboratory
1
This guide is under the jurisdiction of ASTM Committee D08 on Roofing and
samples. The thickness of the polyurethane foam sprayed,
Waterproofing and is the direct responsibility of Subcommittee D08.06 on Spray
number of passes, temperature of substrate, ambient tempera-
Polyurethane Foam Roof Systems.
Current edition approved Dec. 1, 2004. Published December 2004. Originally
ture, and so forth will have an effect on all polyurethane foam
approved in 2001. Last previous edition approved in 2001 as D6705 – 01. DOI:
properties.
10.1520/D6705-04.
2 5.1.3 The specifier should consult with the respective ma-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM terial manufacturer of the sprayed-in-place polyurethane foam
Standards volume information, refer to the standard’s Document Summary page on
roof system. This should include, but not be limited to,
the ASTM website.
materials selection, expansion joints, flashing details, and other
3
Available from Spray Polyurethane Foam Alliance, 4400 Fair Lakes Ct., Suite
items.
105, Fairfax, VA 22033.
4
AvailablefromTheAllianceforthePolyurethanesIndustry,1300WilsonBlvd.,
Arlington, VA 22209.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6705 – 04
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 u
...