ASTM D7119/D7119M-21

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Designation: D7119/D7119M − 13a D7119/D7119M − 21
Standard Guide for
Sampling Spray Polyurethane Foam and Coating in
Roofing
This standard is issued under the fixed designation D7119/D7119M; 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 removal of test specimens from spray polyurethane foam (SPF) roofing systems in the field for the
purpose of examination of an existing system and/or quality assurance for new installations. It describes the types and purposes
of sample cuts, visual inspection techniques, laboratory physical property tests, and repair of the core and slit sample holes.
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 aremay not necessarilybe exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, andother. Combining values from the two systems shall not be combined.may result in nonconformance
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.
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.
2. Referenced Documents
2.1 ASTM Standards:
C1029 Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
D1079 Terminology Relating to Roofing and Waterproofing
D1621 Test Method for Compressive Properties of Rigid Cellular Plastics
D1622 Test Method for Apparent Density of Rigid Cellular Plastics
D4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Based Materials
D6705D6705/D6705M Guide for Repair and Recoat of Spray Polyurethane Foam Roofing Systems
D7425/D7425M Specification for Spray Polyurethane Foam Used for Roofing Applications
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 Aug. 1, 2013Jan. 1, 2021. Published August 2013February 2021. Originally approved in 2007. Last previous edition approved in 2013 as
D7119 – 13.D7119/D7119M – 13a. DOI: 10.1520/D7119_D7119M–13A.10.1520/D7119_D7119M-21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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.
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D7119/D7119M − 21
3. Terminology
3.1 Definitions—Definitions are in accordance with Terminology D1079.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 core samples, n—cylindrical sections of approximately 50 to 75 mm [2 to 3 in.] in diameter. They shall be cut using a round
metal template or coring tool, and they shall extend from surface down to but not through the substrate.
1 3
3.2.2 slit samples, n—crescent-shapedprism-shaped samples approximately 13 mm [ ⁄2 in.] wide, 19 mm [ ⁄4 in.] deep, and 50 to
75 mm [2 to 3 in.] long, cut with a sharp knife. Slit samples are used to examine the uppermost polyurethane foam layers and the
coating system.
3.3 lift, n—an individual layer of polyurethane foam that results from a single pass of the spray gun.
4. Significance and Use
4.1 Adequate coating thickness (mil thickness) is necessary to protect polyurethane foam from the effects of ultraviolet
degradation. This guide outlines general procedures for sampling and measuring the coating thickness by using slit or core samples.
4.2 Thickness of individual lifts of sprayed foam will have a bearing upon foam stability. Core samples are used to determine foam
thickness. Compressive strength and core density affect resistance to foot traffic and impact. Specimens from core samples are used
to determine these properties using Test Methods D1621 and D1622. Visual examinations of core specimens also indicate the
quality of adhesion of the coating and the foam,foam between foam lifts,lifts and between foam and substrate.
4.3 Slit samples are used to visually examine the foam’s cell structure, the number of coating layers applied, dry film thickness
of the coating, and coating adhesion.
5. Sampling for Quality Assurance of Recently Completed Sprayed Polyurethane Roof Systems
5.1 When specified, samples shall be taken from the SPF roofing system for quality assurance. The sampling frequency shall be
according to 5.2 and 5.3 unless another sampling frequency has been specified.
2 2 2
5.2 Two core samples shall be taken from the first 900 m900 m [10 000 ft ] of roof area and one for each additional 900 m900 m
[10 000 ft ] or fraction thereof.
2 2
5.3 When specified, six slit samples shall be taken for every 900 m [10 000 ft ].
6. Sampling Existing Spray Polyurethane Roof Systems
6.1 Core or slit samples, or both, shall be taken as needed to establish the general condition of the spray polyurethane fo
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