ASTM D7425/D7425M-13(2019)

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:D7425/D7425M −13 (Reapproved 2019)
Standard Specification for
Spray Polyurethane Foam Used for Roofing Applications
This standard is issued under the fixed designation D7425/D7425M; 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 Properties by Means of the Heat Flow Meter Apparatus
C1363 Test Method for Thermal Performance of Building
1.1 This specification covers the types and physical proper-
Materials and Envelope Assemblies by Means of a Hot
ties of spray polyurethane foam (SPF) for use in SPF roofing
Box Apparatus
applications.
D1079 Terminology Relating to Roofing and Waterproofing
1.2 This specification does not provide guidance for appli-
D1621 Test Method for Compressive Properties of Rigid
cation.
Cellular Plastics
D1622/D1622M Test Method forApparent Density of Rigid
1.3 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in Cellular Plastics
D1623 Test Method for Tensile and Tensile Adhesion Prop-
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining erties of Rigid Cellular Plastics
D2126 Test Method for Response of Rigid Cellular Plastics
values from the two systems may result in nonconformance
with the standard. to Thermal and Humid Aging
D2842 Test Method for Water Absorption of Rigid Cellular
1.4 This standard does not purport to address all of the
Plastics
safety concerns, if any, associated with its use. It is the
D6226 Test Method for Open Cell Content of Rigid Cellular
responsibility of the user of this standard to establish appro-
Plastics
priate safety, health, and environmental practices and deter-
E96/E96M Test Methods for Water Vapor Transmission of
mine the applicability of regulatory limitations prior to use.
Materials
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3. Terminology
ization established in the Decision on Principles for the
3.1 Definitions—For definitions of terms used in this
Development of International Standards, Guides and Recom-
specification, refer to Terminologies D1079 and C168.
mendations issued by the World Trade Organization Technical
3.1.1 knit line—also called lift line. They are interchange-
Barriers to Trade (TBT) Committee.
able terms describing the adhesion plane where one pass is
sprayed over another.
2. Referenced Documents
2.1 ASTM Standards:
4. Significance and Use
C165 Test Method for Measuring Compressive Properties of
4.1 This specification covers spray polyurethane foam
Thermal Insulations
(SPF) that is used as part of a SPF roofing system.
C168 Terminology Relating to Thermal Insulation
C177 Test Method for Steady-State Heat Flux Measure-
5. Classification
ments and Thermal Transmission Properties by Means of
5.1 This specification covers SPF currently commercially
the Guarded-Hot-Plate Apparatus
available as described by the physical property requirements in
C518 Test Method for Steady-State Thermal Transmission
Table 1.
6. Ordering Information
This specification is under the jurisdiction of ASTM Committee D08 on
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.06
6.1 Orders for materials purchased under this specification
on Spray Polyurethane Foam Roof Systems.
shall include the following:
Current edition approved Dec. 15, 2019. Published December 2019. Originally
6.1.1 ASTM designation, year of issue, and title.
approved in 2008. Last previous edition approved in 2013 as D7425/D7425M – 13.
DOI: 10.1520/D7425_D7425M-13R19.
6.1.2 Type.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1.3 Sampling, if different (see Section 9).
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1.4 If packaging is other than specified (see 13.1).
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 6.1.5 If marking is other than specified (see 13.4).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7425/D7425M−13 (2019)
TABLE 1 Physical Property
NOTE 1—Thermal resistance of SPF for roofing application varies significantly depending on formulations, but shall have a minimum value of
2 2
0.98 K·m /W [5.6 °F·ft /Btu] per 25.4 mm [1 in.].
Property Units Requirements
2 2
Thermal resistance of 25 mm [1.0 in.] thickness aged at K·m /W [°F·ft ·h/Btu] 0.98 [5.6], min
mean temperature 24 °C [75 °F] for 180 days or at mean
temperature 60 °C [140 °F] for 90 days.
Compressive strength, at yield or 10 % deformation KPa [psi] 276 [40], min
3 3
Density Kg/m [lb ⁄ft ] 40 [2.5], min
Water absorption volume % 5, max
Tensile strength KPa [psi] 276 [40], min
Dimensional stability, 70 °C, 97 % RH, 2 weeks linear change % +6, max
Closed cell content % 90, min
Water vapor permeability ng/Pa·s·[perm-in.] 4.47 [3.02], max
7. Materials and Manufacture minimum of two passes and a maximum of three.Asample of
305 by 305 mm [12 by 12 in.] is cut from the center of the
7.1 SPF is produced by the catalyzed polymerization of
plywood foam sample as the test specimen. The specimen and
polyisocyanates in the presence of polyhydroxyl compounds,
plywood will be cut in such a manner that it will have a knit
with the addition of other compounds such as stabilizers and
line. The cut foam height will be 25.4 mm [1 in.] from the
blowing agents.
plywood surface. The test specimen will have smooth edges
7.2 The materials shall be capable of being mixed and
free of cracks. All faces shall be flat. Dust shall be blown off
applied using commercially available polyurethane spray
the sample. Two specimens shall be used for test exposure per
equipment.
test. In addition, one sample of the plywood will also be cut to
these dimensions as a control.
8. Physical Requirements
8.1 SPF used in roofing applications shall meet the mini-
11. Test Methods
mum physical property values as shown in Table 1.
11.1 Determine thermal resistance in accordance with Test
8.2 Other physical properties may be required, as agreed
Method C177, Test Method C1363, or Test Method C518 at a
upon by the purchaser and the manufacturer.
mean temperature of 24 6 1 °C [75 6 2 °F] and 22 °C [40 °F]
minimum temperature gradient. These core specimens shall be
9. Sampling
conditioned 24 6 1 °C [75 6 2 °F]
...