1、Designation: C1743 12C1743 18Standard Practice forInstallation and Use of Radiant Barrier Systems (RBS) inResidential Building Construction1This standard is issued under the fixed designation C1743; the number immediately following the designation indicates the year oforiginal adoption or, in the ca
2、se of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice has been prepared for use by the designer, specifier, builder, and the insta
3、ller of radiant barrier systems (RBS)for use in (multi- and single-family) residential building construction, not otherwise restricted from use. The scope is limited toinstructions relative to the use and installation of RBS, including a surface(s) normally having an emittance of 0.1 or less, suchas
4、 metallic foil or metallic foil deposits, mounted on substrates. Some examples that this practice is intended to address include:(1) low-emittance surfaces in vented building envelope cavities intended to retard radiant transfer across the airspace: (2)low-emittance surfaces at interior building sur
5、faces intended to retard radiant transfer to, or from, building inhabitants; and (3)low-emittance surface at interior building surfaces intended to reduce radiant transfer to, or from, radiant heating or coolingsystems.1.2 This practice covers the installation process from pre-installation inspectio
6、n through the post-installation procedure. It doesnot cover the production of the radiant barrier materials. (See Specification C1313.)1.3 This practice is not intended to replace the manufacturers installation instructions but shall be used in conjunction with suchinstructions. This practice is not
7、 intended to supercede local, state, federal, or international codes.1.4 This practice assumes that the installer possesses a good working knowledge of the applicable codes and regulations, safetypractices, tools, equipment, and methods necessary for installation of radiant barrier materials. It als
8、o assumes that the installerunderstands the fundamentals of residential building construction that affect the installation of RBS.1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for in
9、formation only and are not considered standard.1.6 This standard 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 regul
10、atorylimitations prior to use. For specific precautionary statements see Sections 5 and 7.1.6 This standard 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, health, and envir
11、onmental practices and determine the applicability ofregulatory limitations prior to use. For specific precautionary statements see Sections 5 and 7.1.7 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on
12、 Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C168 Terminology Relating to Thermal InsulationC1313 Specification for Sheet Radiant Bar
13、riers for Building Construction Applications2.2 NFPA Standards3NFPA 54 National Fuel Gas CodeNFPA 211 Standard for Chimneys, Fireplaces and Vents1 This practice is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.21 on Reflective
14、 Insulation.Current edition approved May 1, 2012Nov. 1, 2018. Published June 2012December 2018. originallyOriginally approved in 2010. Last previous edition approved in20102012 as C1743C1743 12.10. DOI: 10.1520/C174312. 10.1520/C1743-18.2 For referencedASTM standards, visit theASTM website, www.astm
15、.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.3 Available from National Fire Protection Association (NFPA), 1 Batterymarch Park, Quincy, MA 02169-7471, http:/www.nfpa.org
16、.This document is not an ASTM standard and is intended only 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 ed
17、itions as appropriate. In all cases only the current versionof 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 States12.3 Other Document:4CPSC Product Safety Fact Sh
18、eet No. 18 “The Home Electrical System”3. Terminology3.1 DefinitionsFor definitions of terms used in this practice, refer to Terminology C168.3.2 Definitions of Terms Specific to This Standard:3.2.1 applicator, nperson or persons who apply radiant barrier materials in buildings.3.2.2 conditioned spa
19、ce, nany space in a building that is served by a heating or cooling system.3.2.3 open air space, nvented building cavity (for example, a vented attic) or a large conditioned or unconditioned buildingspace.3.2.3.1 DiscussionA large building space is defined as one whose minimum dimension exceeds 2 ft
20、 (0.6 m).3.2.4 radiant barrier system, RBS, nbuilding construction assembly consisting of a at least one low-emittance (0.1 or less)surface bounded by an open air space on one or both sides.3.2.4.1 DiscussionA RBS is used for the sole purpose of limiting heat transfer by radiation, into or out of a
21、building assembly. An RBS is notspecifically intended to reduce heat transfer by convection or conduction.4. Significance and Use4.1 In this practice it is recognized that effectiveness, safety, and durability of an RBS depends not only on the quality of thematerials, but also on proper installation
22、.4.2 Improper installation of an RBS will reduce the thermal effectiveness, cause fire risks and other unsafe conditions, andpromote deterioration of the structure in which it is installed. Improper installations include fires caused by: (1) heat buildup inrecessed lighting fixtures, (2) deteriorati
23、on or failure of electrical wiring components, and (3) deterioration in wood structures andpaint failure as a result of moisture accumulation.4.3 This practice provides directions for the installation of RBS products in a safe and effective manner. Actual conditions inexisting buildings vary greatly
24、 and care shall be taken to ensure safe and effective installation.4.4 In this practice requirements are presented that are both general and specific in nature and practical. They are not intendedas specific instructions unless so indicated. The user shall consult the manufacturer for recommended ap
25、plication and installationmethods. The requirements in this practice shall be the minimum material and installation requirements for RBS.5. Safety Precautions5.1 The applicator shall wear proper clothing and equipment as specified by the manufacturer and shall follow all local, state,and federal cod
26、es and safety regulations for building construction sites, for example hard hats, safety goggles respiratoryprotection, and other safety items.6. Pre-Installation Inspection and Preparation6.1 Pre-Installation Inspections: New and Retrofit Buildings:6.1.1 Inspect the roof, wall, ceiling, and floor b
27、uilding materials to identify areas in which previous or existing moistureproblems have caused paint peeling, lumber warpage, staining, visible fungal growth, rotting, or other structural damage. Do notinstall the RBS in such areas until the owner/builder has been informed and has certified that the
28、se conditions have been correctedand the cause of the condition repaired.6.1.2 In areas where an RBS is to be installed, components of the electrical system shall be in good condition. When there isreason to believe the electrical system is faulty, do not install RBS in such areas until the owner/bu
29、ilder has been informed andqualified inspection and repair has been accomplished.NOTE 1The CPSC Product Safety Fact Sheet No. 18 has identified the following signs of potential electrical deficiencies: lights dimming, fusesblowing, circuit breakers tripping frequently, electrical sparks and glowing
30、from receptacle, light flickering, and cover plates on switches and outlets thatare warm or hot to the touch.4 Available from U.S. Consumer Product Safety Commission (CPSC), 4330 East West Hwy., Bethesda, MD 20814, http:/www.cpsc.gov.C1743 1826.1.3 In areas where an RBS is to be installed, the appli
31、cator shall locate and plan for installation around ventilation openings.The applicator shall not install RBS that will obstruct or block existing ventilation openings, such as gable ends, dormers, ridge,off ridge, soffit vents, or any others.6.2 Preparations:6.2.1 All electrical wiring at, or near,
32、 radiant barrier material attachment surfaces shall be either moved, or protected, to ensurethat fasteners used to install the radiant barrier material cannot contact the electrical wiring system.6.2.2 When attic ventilation and new, or existing, ceiling insulation will be compromised by the install
33、ation of an RBS, ventbaffles shall be installed at the soffits of the attic such that attic ventilation air flows are maintained in accordance with applicablebuilding codes.7. Installation Guidelines-New and Retrofit Buildings7.1 Material Handling:7.1.1 The radiant barrier material shall be handled
34、in accordance with the manufacturers instructions, shall be kept dry, andshall not be in contact with the ground or sources of water.7.1.2 The radiant barrier material shall not be placed in contact with corrosive building materials.7.2 Performance Considerations:7.2.1 The performance of the RBS dep
35、ends on adherence to manufacturers specifications. Manufacturers installationinstructions and all applicable building codes shall be followed. The manufacturer shall provide the product information sheet(s)that specify the products intended use(s), application method(s), health and safety considerat
36、ions, and material properties perSpecification C1313.7.2.2 The performance of the RBS is dependent on the presence of an open airspace adjacent to at least one low-emittancesurface.7.2.3 The performance of the RBS will be adversely affected by foreign materials on the low-emittance surface. Beforein
37、stallation, foreign materials shall be removed using manufacturers instructions, taking care not to damage the radiant barriermaterial.7.2.4 The performance of a radiant barrier will be reduced by a corrosive environment. In some instances, severe pollutants reactwith the low-emittance surface causi
38、ng an increase in the emittance of the material. When such conditions exist, the owner/buildershall be informed that these conditions have the potential to result in material degradation and a decrease in RBS performance.7.2.5 In some instances, the performance of a radiant barrier will be reduced b
39、y the presence of moisture on the low-emittancesurface. Such conditions are potentially temporary or long term and the manufacturer shall be consulted to determine theapplicability of RBS when these conditions are expected to occur.7.2.6 The performance of the RBS will be adversely affected by the a
40、ccumulation of dust over time on the low-emittancesurface. RBS shall be installed to avoid the settlement of dust on the radiant barrier surface. Dust is not a concern on a downwardfacing RBS.7.2.7 Damaged areas will result in loss of performance and shall be repaired in accordance with the manufact
41、urers instructions.7.3 Installation Precautions:7.3.1 In areas in which radiant barrier materials are to be installed, the applicator shall provide clearance around lightingfixtures, motors, fans, blowers, heaters, flues, chimneys, and other heat-producing electrical and mechanical devices.7.3.1.1 T
42、he applicator shall provide 3-in. (75-mm) minimum clearance around all sides of recessed lighting fixtures unless suchfixtures are approved for installation in direct contact with radiant barrier materials. Such fixtures include fixture wiringcompartments, ballasts, and other heat-producing devices.
43、 These devices shall not be covered unless they are specifically approvedfor operation when covered.7.3.1.2 The applicator shall provide the minimum clearances specified in NFPA54. Provide a 2-in. (50-mm) minimum clearancefrom the outside face of the masonry around masonry chimneys or masonry enclos
44、ing a flue. For vents, vent connectors, andchimneys other than masonry, provide minimum clearances as specified in NFPA 211.7.3.1.3 The operative material of most RBS is a metallic foil or vapor deposition of a metal on a substrate. Therefore, radiantbarrier materials can provide an extremely high r
45、esistance to water vapor transmission. Radiant barriers shall not be installed soas to lead to moisture accumulation and deterioration in the structure. Some radiant barriers are produced to provide low resistanceto water vapor transmission. High vapor permeable- house wraps and perforated products
46、are examples.7.3.1.4 In wood or steel framed buildings (new or retrofit), a perforated radiant barrier shall always be used when ceilinginsulation is installed, such as in roof or sidewall installations, in direct contact with the radiant barrier (cold-winter side). Whenthe radiant barrier is below
47、or next to an unfaced insulation in the wall or roof (warm-winter side), a nonperforated radiant barriershall be used.7.3.1.5 Regardless of construction type, all radiant barrier materials that are installed with the low-emittance material(s) in directcontact with other metals shall be separated by
48、an acceptable thermal break.7.4 Installation:7.4.1 Determine that the RBS material and installation meet the following criteria:C1743 1837.4.1.1 Testing and certificationThe materials shall meet all the requirements of Specification C1313 as well as comply withall certification and codes governing t
49、he use and installation of radiant barriers.7.4.1.2 InstallationThe installer or applicator shall install the RBS according to the manufacturers installation instuctions. Inaddition, the following minimum installation procedures shall be followed when installing an RBS in specific areas of the structuresuch as:(1) AtticThere are four methods of installing a RBS:(a) Factory applied (laminated) or field-applied RBS (stapled) to the underside of the roof deck facing towards the interior (Fig.1.Aperforated RBS is always required for this type of installation.A
