1、Designation: D7119 07D7119/D7119M 13Standard Guide forSampling Spray Polyurethane Foam and Coating inRoofing1This standard is issued under the fixed designation D7119;D7119/D7119M; the number immediately following the designation indicatesthe year of original adoption or, in the case of revision, th
2、e 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 fi
3、eld 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 SI
4、 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 standard
5、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 Sta
6、ndards: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 Method
7、s 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 samples
8、, ncylindrical sections of approximately 50 to 75 mm (22 to 3 in.)in. in diameter. They shall be cut usinga round 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.)in. wide,
9、 19 mm (34 in.)in. deep, and 50 to 75mm (22 to 3 in.)in. long, cut with a sharp knife. Slit samples are used to examine the uppermost polyurethane foam layers andthe coating system.3.3 lift, nan individual layer of polyurethane foam that results from a single pass of the spray gun.4. Significance an
10、d Use4.1 Adequate coating 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
11、 foam will have a bearing 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 an
12、d is the direct responsibility of Subcommittee D08.06 on SprayPolyurethane Foam Roof Systems.Current edition approved July 1, 2007Jan. 15, 2013. Published August 2007February 2013. Originally approved in 2007. Last previous edition approved in 2007 asD7119 07. DOI: 10.1520/D7119-07.10.1520/D7119_D71
13、19M13.2 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 10 000 ft2) of roof area and one for each additional 900m2 (10 00010 000 ft2) or fraction thereof.5.3 When specified, six slit samples shall be taken for every 900 m2 (10 00010 000 ft2).6. Sampling Existing Spray Polyurethane Roof Systems6.1 Core or
19、slit samples, or both, shall 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 appropr
20、iate, in accordance with 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 coatin
21、g thickness.7.3 Visually 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
22、 using Test Method D4442.8. 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 c
23、leaned (per sealant manufacturersinstructions) 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 andcomp
24、ressive strength of replacement polyurethane foam shall be equal to or slightly greater in than that prescribed in SpecificationC1029, Type III.8.2 After filling the hole where the core was removed with polyurethane foam or a close fitting polyurethane plug, the surfaceshall be sealed. Apply suffici
25、ent 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 according to the manufacturersrecommendations. Reapply roofing granules when needed to better match the roof su
26、rface.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.)1.0 in. onto the adjacent, intact coating.9. Report9.1 The report should include the following:9.1.1
27、 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 samples on a roof plan.9.1.4 Number of foam passes and average thickness of each pass.9.1.5 Compre
28、ssive 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 determined.D7119/D7119M 13210. Keywords10.1 coating thickness; core samples, roofing; polyurethane f
29、oam 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 this standard are expressly advised that determination of the validity of any such patent right
30、s, 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 years andif not revised, either reapproved or withdrawn.Your comments are invited either for re
31、vision 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 committee, which you may attend. If you feel that your comments have not received a fair hearing yo
32、u 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 19428-2959,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 133
