1、Designation: D7119/D7119M 13D7119/D7119M 13aStandard Guide forSampling Spray Polyurethane Foam and Coating inRoofing1This standard is issued under the fixed designation D7119/D7119M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision,
2、the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide covers the removal of test specimens from spray polyurethane foam (SPF) roofing systems in the
3、field for thepurpose of examination of an existing system and/or quality assurance for new installations. It describes the types and purposesof 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
4、SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.1.3 This standar
5、d does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM S
6、tandards:2C1029 Specification for Spray-Applied Rigid Cellular Polyurethane Thermal InsulationD1079 Terminology Relating to Roofing and WaterproofingD1621 Test Method for Compressive Properties of Rigid Cellular PlasticsD1622 Test Method for Apparent Density of Rigid Cellular PlasticsD4442 Test Meth
7、ods for Direct Moisture Content Measurement of Wood and Wood-Base MaterialsD6705 Guide for Repair and Recoat of Spray Polyurethane Foam Roofing Systems3. Terminology3.1 DefinitionsDefinitions are in accordance with Terminology D1079.3.2 Definitions of Terms Specific to This Standard:3.2.1 core sampl
8、es, ncylindrical sections of approximately 50 to 75 mm 2 to 3 in. in diameter. They shall be cut using around metal template or coring tool, and they shall extend from surface down to but not through the substrate.3.2.2 slit samples, ncrescent-shaped samples approximately 13 mm 12 in. wide, 19 mm 34
9、 in. deep, and 50 to 75 mm 2to 3 in. long, cut with a sharp knife. Slit samples are used to examine the uppermost polyurethane foam layers and the coatingsystem.3.3 lift, nan individual layer of polyurethane foam that results from a single pass of the spray gun.4. Significance and Use4.1 Adequate co
10、ating thickness (mil thickness) is necessary to protect polyurethane foam from the effects of ultravioletdegradation. 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 be
11、aring upon foam stability. Core samples are used to determinefoam thickness. Compressive strength and core density affect resistance to foot traffic and impact. Specimens from core samples1 This guide is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct resp
12、onsibility of Subcommittee D08.06 on SprayPolyurethane Foam Roof Systems.Current edition approved Jan. 15, 2013Aug. 1, 2013. Published February 2013August 2013. Originally approved in 2007. Last previous edition approved in 20072013as D7119 07.D7119 13. DOI: 10.1520/D7119_D7119M13.10.1520/D7119_D711
13、9M13A.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended o
14、nly to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current ver
15、sionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1are used to determine these properties using Test Methods D1621 and D1622. Visual examinations of core
16、specimens also indicatethe quality of adhesion of the coating and the foam, between foam lifts, and between foam and substrate.4.3 Slit samples are used to visually examine the foams cell structure, the number of coating layers applied, dry film thicknessof the coating, and coating adhesion.5. Sampl
17、ing for Quality Assurance of Recently Completed Sprayed Polyurethane Roof Systems5.1 When specified, samples shall be taken from the SPF roofing system for quality assurance. The sampling frequency shallbe according to 5.2 and 5.3 unless another sampling frequency has been specified.5.2 Two core sam
18、ples shall be taken from the first 900 m2 10 000 ft2 of roof area and one for each additional 900 m2 10 000ft2 or fraction thereof.5.3 When specified, six slit samples shall be taken for every 900 m2 10 000 ft2.6. Sampling Existing Spray Polyurethane Roof Systems6.1 Core or slit samples, or both, sh
19、all be taken as needed to establish the general condition of the spray polyurethane foam andcoating.6.2 Core samples are used to determine adhesion, moisture content, and general conditions in order to determine whetherreapplication of polyurethane foam or coating is appropriate, in accordance with
20、Guide D6705.7. Inspection7.1 In locations where a slit sample is to be removed, a measuring probe can first be inserted through the coating and foam tomeasure the foam depth.7.2 Measure the coating thickness on the slit sample with an optical comparator and record the coating thickness.7.3 Visually
21、inspect core specimens for cell structure and condition of foam, adhesion of coating to foam and adhesion betweenpolyurethane foam layers.7.4 Compressive strength is determined using Test Method D1621. Density is determined by Test Method D1622. Moisturecontent is determined using Test Method D4442.
22、8. Repair of Holes Made by Removal of Core or Slit Samples8.1 Holes left by removal of core samples shall be filled with polyurethane foam or a polyisocyanurate foam plug set incompatible sealant. Before filling the holes, the SPF roof surface surrounding the hole shall be cleaned (per sealant manuf
23、acturersinstructions) to ensure adequate adhesion of the sealant to the SPF roof surface. Use silicone sealant for repairing silicone-coatedsystems, polyurethane sealant for polyurethane coated systems, and acrylic sealant for acrylic-coated roof systems. The density andcompressive strength of repla
24、cement polyurethane foam shall be equal to or slightly greater in than that prescribed in SpecificationC1029, Type III.NOTE 1If the sealant manufacturer does not provide surface cleaning instructions for cleaning SPF root surface, the following procedure shall be used:Clean foam and coated area of d
25、irt and debris where sealant is to be installed with dry or damp cloth or sponge. If using a damp cloth or sponge, allowthe area to dry or wipe it dry with cloth or towel. Verify no contaminants are present that may affect adhesion of the sealant.8.2 After filling the hole where the core was removed
26、 with polyurethane foam or a close fitting polyurethane plug, the surfaceshall be sealed. Apply sufficient compatible sealant to completely cover the plug and to extend onto the coated surface, or applya coating system that is compatible in type to the existing coating system and is applied accordin
27、g to the manufacturersrecommendations. Reapply roofing granules when needed to better match the roof surface.8.3 Holes left by removal of slit samples shall be filled with compatible sealant (and slightly overfilled to compensate forshrinkage). The sealant shall be carried approximately 25 mm 1.0 in
28、. onto the adjacent, intact coating.9. Report9.1 The report should include the following:9.1.1 Description of the coating system, noting granules if present; number of base and topcoats and color of topcoat.9.1.2 Minimum and average thickness of base and topcoats.9.1.3 Location of core and slit samp
29、les on a roof plan.9.1.4 Number of foam passes and average thickness of each pass.9.1.5 Compressive strength and density of foam, if determined.9.1.6 Comments on adhesion between sample components, foam layers, blisters, friable foam, and other visual defects.9.1.7 Moisture content of foam if determ
30、ined.D7119/D7119M 13a210. Keywords10.1 coating thickness; core samples, roofing; polyurethane foam lifts; slit samples; sprayed polyurethane foamASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of
31、this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five
32、years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical comm
33、ittee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19
34、428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D7119/D7119M 13a3
