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ASTM D6947-07

(Specification)

Standard Specification for Liquid Applied Moisture Cured Polyurethane Coating Used in Spray Polyurethane Foam Roofing System

Standard Specification for Liquid Applied Moisture Cured Polyurethane Coating Used in Spray Polyurethane Foam Roofing System

ABSTRACT
This specification covers a single component protective roof coating composed of solvent-borne moisture curing urethane elastomeric polymer, to which various pigments or other additives have been added to give the required physical properties. The product, as manufactured, shall be in liquid form for application to spray polyurethane foam (SPF) surfaces by brushing, rolling, or spraying. However, guidance for its application is not addressed here. Coatings shall be tested and conform accordingly to specified liquid property requirements as to viscosity, and volume and weight of solids. Dry films shall also adhere to the following physical property requirements, when tested as appropriate: initial percent elongation at break; initial tensile strength at maximum stress; final percent elongation at break after accelerated weathering; permeance; water absorption; adhesion; fungi resistance; tear resistance; and low temperature flexibility.
SCOPE
1.1 This specification covers a single component, moisture cured, elastomeric urethane polymer coating used as a protective coating for spray polyurethane foam roofing systems.
1.2 This specification does not provide guidance for application.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 The following precautionary caveat pertains only to the test method portions, Sections 5 and 6.
1.5 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 requirements prior to use.

General Information

Status
Historical
Publication Date
30-Apr-2007
ICS
91.100.60 - Thermal and sound insulating materials
Technical Committee
D08 - Roofing and Waterproofing
Drafting Committee
D08.06 - Spray Polyurethane Foam Roof Systems
Current Stage
Ref Project

Relations

Replaces
ASTM D6947-06 - Standard Specification for Liquid Applied Moisture Cured Polyurethane Coating Used in Spray Polyurethane Foam Roofing System
Effective Date
01-May-2007
Replaced By
ASTM D6947-07(2013) - Standard Specification for Liquid Applied Moisture Cured Polyurethane Coating Used in Spray Polyurethane Foam Roofing System
Effective Date
01-May-2013

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ASTM D6947-07 - Standard Specification for Liquid Applied Moisture Cured Polyurethane Coating Used in Spray Polyurethane Foam Roofing SystemASTM D6947-07 - Standard Specification for Liquid Applied Moisture Cured Polyurethane Coating Used in Spray Polyurethane Foam Roofing System
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ASTM D6947-07 - Standard Specification for Liquid Applied Moisture Cured Polyurethane Coating Used in Spray Polyurethane Foam Roofing System
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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:D6947 −07
StandardSpecification for
Liquid Applied Moisture Cured Polyurethane Coating Used
1
in Spray Polyurethane Foam Roofing System
This standard is issued under the fixed designation D6947; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D903Test Method for Peel or Stripping Strength of Adhe-
sive Bonds
1.1 This specification covers a single component, moisture
D1079Terminology Relating to Roofing and Waterproofing
cured, elastomeric urethane polymer coating used as a protec-
D1644Test Methods for Nonvolatile Content of Varnishes
tive coating for spray polyurethane foam roofing systems.
D1653Test Methods for Water Vapor Transmission of Or-
1.2 This specification does not provide guidance for appli-
ganic Coating Films
cation.
D2196Test Methods for Rheological Properties of Non-
1.3 The values stated in SI units are to be regarded as Newtonian Materials by Rotational (Brookfield type)
standard. The values given in parentheses are for information
Viscometer
only. D2697Test Method for Volume Nonvolatile Matter in Clear
or Pigmented Coatings
1.4 The following precautionary caveat pertains only to the
D2370Test Method for Tensile Properties of Organic Coat-
test method portions, Sections 5 and 6.
ings
1.5 This standard does not purport to address all of the
D4798Practice for Accelerated Weathering Test Conditions
safety concerns, if any, associated with its use. It is the
and Procedures for Bituminous Materials (Xenon-Arc
responsibility of the user of this standard to establish appro-
Method)
priate safety and health practices and determine the applica-
G21Practice for Determining Resistance of Synthetic Poly-
bility of regulatory requirements prior to use.
meric Materials to Fungi
2. Referenced Documents
3. Terminology
2
2.1 ASTM Standards:
3.1 Fordefinitionsoftermsspecifictothisstandard,referto
D16TerminologyforPaint,RelatedCoatings,Materials,and
Terminologies D16 and D1079.
Applications
D412TestMethodsforVulcanizedRubberandThermoplas-
4. Materials and Manufacture
tic Elastomers—Tension
D471Test Method for Rubber Property—Effect of Liquids
4.1 Composition—Theproduct,asmanufactured,shallbein
D522Test Methods for Mandrel Bend Test of Attached
liquid form for application to spray polyurethane foam (SPF)
Organic Coatings
surfacesbybrushing,rolling,orspraying.Theproductshallbe
D562Test Method for Consistency of Paints Measuring
composed of a solvent-borne moisture curing urethane elasto-
KrebsUnit(KU)ViscosityUsingaStormer-TypeViscom-
meric polymer, to which various pigments or other additives
eter
have been added to give the required physical properties.
D624Test Method for Tear Strength of Conventional Vul-
4.2 Physical Properties—Although the product is supplied
canized Rubber and Thermoplastic Elastomers
as a liquid, its performance is based on the functional proper-
ties of the dried material in film form. The coating is formed
1
This specification is under the jurisdiction of ASTM Committee D08 on into a film fully adhered to the substrate surface.
RoofingandWaterproofingandisthedirectresponsibilityofSubcommitteeD08.06
on Spray Polyurethane Foam Roof Systems.
5. Physical Properties
Current edition approved May 1, 2007. Published May 2007. Originally
approved in 2006. Last previous edition approved in 2006 as D6947–06. DOI:
5.1 The liquid coating shall comply with physical property
10.1520/D6947-07.
2 requirements in Table 1.
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
5.2 The film shall comply with physical property require-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ments in Table 2.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6947−07
2
TABLE 1 Liquid Property Requirements NOTE 1—Based on the irradiance level of 0.35 W/(m · nm) at 340 nm
specified in Practice D4798, the exposure time required to accumulate the
Physical
ASTM Requirements
radiant energy specified in 6.4 is 1000 h.
Properties
Viscosity D562 90 to 110 KU
6.5 Permeance (Test Methods D1653, Procedure B)—A0.5
D2196 12 to 85 Pa·s
mm (20 mils) 6 10% film shall be used.
Volume Solids D2697 Greater than 65 %
6.5.1 Test Conditions: 23 6 2°C (73.4 6 3.6°F).
Weight Solids D1644 As listed by Manufacturer
6.5.2 Test is run in the inverted position with water in
contact with the film.
TABLE 2 Film Physical Property Requirements for Polyurethane
6.5.3 Value is re
...

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This specification covers a single component protective roof coating composed of solvent-borne moisture curing urethane elastomeric polymer, to which various pigments or other additives have been added to give the required physical properties. The product, as manufactured, shall be in liquid form for application to spray polyurethane foam (SPF) surfaces by brushing, rolling, or spraying. However, guidance for its application is not addressed here. Coatings shall be tested and conform accordingly to specified liquid property requirements as to viscosity, and volume and weight of solids. Dry films shall also adhere to the following physical property requirements, when tested as appropriate: initial percent elongation at break; initial tensile strength at maximum stress; final percent elongation at break after accelerated weathering; permeance; water absorption; adhesion; fungi resistance; tear resistance; and low temperature flexibility.
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1.1 This specification covers a single component, moisture cured, elastomeric urethane polymer coating used as a protective coating for spray polyurethane foam roofing systems.  
1.2 This specification does not provide guidance for application.  
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4.1 The failure to correct membrane defects during and as soon as possible after its installation can cause premature failure of the membrane. Problems include design deficiencies, faulty application of the membrane system, and damage by subsequent trades.4 Roof designs incorporating a waterproof membrane under overburden such as a vegetative roof, insulation layer, wear-course, or topping slab greatly exacerbate the problem of leak locating.  
4.2 This guide describes methods for using electric conductance testing to locate breaches in waterproof membranes.5 The methods described include testing procedures designed to provide a part of the construction quality control of membrane installations.  
4.3 The methods described in this guide may also be used for integrity or forensic testing of existing waterproof membranes; specific limitations apply.  
4.4 The electric conductance methods described in this guide require a conductive substrate under the membrane to serve as a ground return path for the test currents. In roof assemblies where the membrane is installed over electric insulating material such as insulating foam or a protection board, or both, the electric path to any conductive deck is interrupted. The situation can be remedied by placing a conductive material directly under the membrane. The conductive material provides the return path for the test currents.
SCOPE
1.1 This guide describes standard procedures for using electrical conductance measurement methods to locate leaks in exposed or covered waterproof membranes.  
1.2 This guide addresses the need for a general technical description of the current methods and procedures that are used to test and verify the integrity of waterproof membranes.  
1.3 This guide is not intended to replace visual, infrared, or other methods of inspection. It is to be used in conjunction with other methods of roof inspection when specified.  
1.4 This guide recommends that the leak location equipment, procedures, and survey parameters used are calibrated to meet established minimum leak detection sensitivity. The leak detection sensitivity calibration should be verified on a regular basis according to the manufacturer’s recommendations.  
1.5 Leak location surveys can be used on waterproofing membranes installed in roofs, plaza decks, pools, water features, covered reservoirs, and other waterproofing applications.  
1.6 The procedures are applicable for membranes made of materials such as polyethylene, polypropylene, polyvinyl chloride, bituminous material, and other electrically insulating materials.  
1.7 This guide provides a general description of the equipment and methods for locating membrane breaches using electric conductance. Refer to the manufacturer’s instructions for the proper operation and use of the equipment described in this guide.  
1.8 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.  
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ASTM D7954/D7954M-22a(Practice)
Standard Practice for Moisture Surveying of Roofing and Waterproofing Systems Using Nondestructive Electrical Impedance Scanners

SIGNIFICANCE AND USE
5.1 Excess moisture trapped in roofing or waterproofing systems can adversely affect performance and lead to premature failure of roofing or waterproofing systems and its components. It also reduces thermal resistance, resulting in reduced energy efficiency and inflated energy costs. Impedance scans can be effective in identifying concealed and entrapped moisture within roofing or waterproofing systems.  
5.2 This practice is intended to be used at various stages of the roofing and waterproofing system’s life such as: during or at completion of installation of roofing or waterproofing system to determine if there was moisture intrusion into the roofing or waterproofing system or underlying materials; at regular intervals as part of a preventative maintenance program; and to aid in condition assessment, or before replacement or repair work, or combinations thereof, to assist in determining the extent of work and replacement materials.  
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SCOPE
1.1 This practice applies to techniques that use nondestructive electrical impedance (EI) scanners to locate moisture and evaluate the comparative moisture content within insulated low-slope roofing and waterproofing systems.  
1.2 This practice is applicable to roofing and waterproofing systems wherein insulation is placed above the deck and positioned underneath and in contact with electrically nonconductive single-ply or built-up roofing and waterproofing membranes and systems such as coal tar, asphalt, modified bitumen, thermoplastics, spray polyurethane foam, and similar electrically nonconductive membrane materials. This practice is also applicable to roofing and waterproofing systems without insulation placed above moisture absorbing decks such as wood, concrete, or gypsum, that are in contact with single-ply or built-up roofing and waterproofing membranes as described above.  
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1.4.3.1 This practice is not appropriate for use with aluminium foil faced modified bitumen membranes, as the electrical conductivity of the aluminium foil surface can give false positive readings.  
1.4.4 While their overburden remains in place, this practice is not appropriate for use with inverted roof membrane assemblies (IRMAs) or protected roof assemblies (PRMAs), which contain above the deck waterproof membrane and overburden that may include insulation, drainage components, pavers, aggregate, ballast, vegetation, or combinations thereof, because the impedance scanner will not differentiate between above and below the membrane moisture.  
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This specification covers the standards for polymer modified bituminous sheet materials proposed for use as underlayment on roof eaves, or valleys, or both, to prevent leakage of shingle, tile or metal roofs from water back-up due to ice dams. The underlayment sheet shall comply with the physical requirements which include thickness, maximum load, elongation, adhesion to plywood, thermal stability, flexibility, tear resistance, moisture vapor permeance, sealability, and slip resistance. The underlayment sheet shall not crack, as well, nor be too sticky as to cause damage upon being unrolled.
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1.1 This specification2 covers the types, physical properties, and dimensions of cellular polystyrene boards with or without facings or coatings made by molding (EPS) or extrusion (XPS) of expandable polystyrene. Products manufactured to this specification are intended for use as thermal insulation for temperatures from –65 to +165°F (–53.9 to +73.9°C). This specification does not apply to laminated products manufactured with any type of rigid board facer including fiberboard, perlite board, gypsum board, or oriented strand board.  
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5.1 Research has demonstrated that in addition to the halide ion chloride; fluoride ions, when deposited and concentrated on the surface of austenitic stainless steel, can contribute to external stress corrosion cracking (ESCC) in the absence of inhibiting ions.5 Two widely used insulation specifications that are specific to ESCC allow the use of the same Test Methods C692 and C871 for evaluation of insulation materials. Both specifications require fluoride ions to be included with chloride ions when evaluating the extractable ions.  
5.2 Chlorides (and fluorides) can be constituents of the insulating material or of the environment, or both. Moisture in the insulation or from the environment can cause chlorides (and fluorides) to migrate through the insulation and concentrate at the hot stainless steel surface.  
5.3 The presence of sodium and silicate ions in the insulation has been found to inhibit external stress corrosion cracking caused by chloride (and fluoride) ions, whether such ions come from the insulation itself or from external sources. Furthermore, if the ratio of sodium and silicate ions to chloride (and fluoride) ions is in a certain proportion in the insulation, external stress corrosion cracking as a result of the presence of chloride (and fluoride) in the insulation will be prevented or at least mitigated (see also Specification C795).
SCOPE
1.1 These test methods cover laboratory procedures for the determination of water-leachable chloride, fluoride, silicate, and sodium ions in thermal insulation materials in the parts per million range.  
1.2 Selection of one of the test methods listed for each of the ionic determinations required shall be made on the basis of laboratory capability and availability of the required equipment and appropriateness to the concentration of the ion and any possible ion interferences in the extraction solution.  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.4 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.  
1.5 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.

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