1、Designation: C1743 10Standard 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 case of re
2、vision, 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 installer of r
3、adiant barrier systems(RBS) for use in (multi- and single-family) residential buildingconstruction, not otherwise restricted from use. The scope islimited to recommendations relative to the use and installationof RBS, including a surface(s) normally having an emittance of0.1 or less, such as metalli
4、c foil or metallic foil deposits,mounted on substrates. Some examples that this practice isintended to address include: (1) low-emittance surfaces invented building envelope cavities intended to retard radianttransfer across the airspace: (2) low-emittance surfaces atinterior building surfaces inten
5、ded to retard radiant transfer to,or from, building inhabitants; and (3) low-emittance surface atinterior building surfaces intended to reduce radiant transfer to,or from, radiant heating or cooling systems.1.2 This practice covers the installation process from pre-installation inspection through th
6、e post-installation procedure.It does not cover the production of the radiant barrier materials.(See Specification C1313.)1.3 This practice is not intended to replace the manufactur-ers installation instructions but shall be used in conjunctionwith such instructions. This practice is not intended to
7、 super-cede local, state, federal, or international codes.1.4 This practice assumes that the installer possesses a goodworking knowledge of the applicable codes and regulations,safety practices, tools, equipment, and methods necessary forinstallation of radiant barrier materials. It also assumes tha
8、t theinstaller understands the fundamentals of residential buildingconstruction that affect the installation of RBS.1.5 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlya
9、nd are not considered standard.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitatio
10、ns prior to use. For specificprecautionary statements see Sections 5 and 7.2. Referenced Documents2.1 ASTM Standards:2C168 Terminology Relating to Thermal InsulationC1313 Specification for Sheet Radiant Barriers for BuildingConstruction Applications2.2 NFPA Standards3NFPA 54 National Fuel Gas CodeNF
11、PA 211 Standard for Chimneys, Fireplaces and Vents2.3 Other Document:4CPSC Product Safety Fact Sheet No. 18 “The Home Elec-trical System”3. Terminology3.1 DefinitionsFor definitions of terms used in this prac-tice, refer to Terminology C168.3.2 Definitions of Terms Specific to This Standard:3.2.1 ap
12、plicator, nperson or persons who apply radiantbarrier materials in buildings.3.2.2 conditioned space, nany space in a building that isserved by a heating or cooling system.3.2.3 open air space, nvented building cavity (for ex-ample, a vented attic) or a large conditioned or unconditionedbuilding spa
13、ce.3.2.3.1 DiscussionA large building space is defined asone whose minimum dimension exceeds 2 ft (0.6 m).3.2.4 radiant barrier system, RBS, nbuilding constructionassembly consisting of a low-emittance (0.1 or less) surfacebounded by an open air space on one or both sides.3.2.4.1 DiscussionA RBS is
14、used for the sole purpose oflimiting heat transfer by radiation, into or out of a buildingassembly. An RBS is not specifically intended to reduce heattransfer by convection or conduction.1This practice is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct responsibil
15、ity of Subcommittee C16.21 on ReflectiveInsulation.Current edition approved Nov. 1, 2010. Published December 2010. DOI:10.1520/C174310.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume inf
16、ormation, refer to the standards Document Summary page onthe ASTM website.3Available from National Fire Protection Association (NFPA), 1 BatterymarchPark, Quincy, MA 02169-7471, http:/www.nfpa.org.4Available from U.S. Consumer Product Safety Commission (CPSC), 4330 EastWest Hwy., Bethesda, MD 20814,
17、 http:/www.cpsc.gov.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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
18、 also on their proper installation.4.2 Improper installation of an RBS will reduce the thermaleffectiveness, 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 buildupin recessed li
19、ghting fixtures, (2) deterioration or failure ofelectrical wiring components, and (3) deterioration in woodstructures and paint failure as a result of moisture accumula-tion.4.3 This practice provides recommendations for the instal-lation of RBS products in a safe and effective manner. Actualconditi
20、ons in existing buildings vary greatly and care shall betaken to ensure safe and effective installation.4.4 In this practice requirements are presented that are bothgeneral and specific in nature and considered practical. Theyare not intended as specific recommendations unless so indi-cated. The use
21、r shall consult the manufacturer for recom-mended application and installation methods. The require-ments in this practice shall be considered as the minimummaterial and installation requirements for RBS.5. Safety Precautions5.1 The applicator shall wear proper clothing and equipmentas recommended b
22、y the manufacturer and shall follow all local,state, and federal codes and safety regulations for buildingconstruction sites, for example hard hats, safety gogglesrespiratory protection, and other safety items.6. Pre-Installation Inspection and Preparation6.1 Pre-Installation Inspections: New and Re
23、trofit Build-ings:6.1.1 Inspect the roof, wall, ceiling, and floor buildingmaterials to identify areas in which previous or existingmoisture problems have caused paint peeling, lumber warpage,staining, visible fungal growth, rotting, or other structuraldamage. Do not install the RBS in such areas un
24、til theowner/builder has been informed and has certified that theseconditions have been corrected and their source(s) eliminated.6.1.2 In areas where an RBS is to be installed, componentsof the electrical system shall be in good condition. If there isreason to believe the electrical system is faulty
25、, do not installRBS in such areas until the owner/builder has been informedand qualified inspection and repair has been accomplished.NOTE 1The CPSC Product Safety Fact Sheet No. 18 has identified thefollowing signs of potential electrical deficiencies: lights dimming, fusesblowing, circuit breakers
26、tripping frequently, electrical sparks and glowingfrom receptacle, light flickering, and cover plates on switches and outletsthat are warm or hot to the touch.6.1.3 In areas where an RBS is to be installed, the applicatorshall locate and plan for installation around ventilation open-ings. The applic
27、ator shall not install RBS that will obstruct orblock existing ventilation openings, such as gable ends, dor-mers, ridge, off ridge, soffit vents, or any others.6.2 Preparations:6.2.1 All electrical wiring at, or near, radiant barrier mate-rial attachment surfaces shall be either moved, or protected
28、, toensure that fasteners used to install the radiant barrier materialcannot contact the electrical wiring system.6.2.2 When attic ventilation and new, or existing, ceilinginsulation will be compromised by the installation of an RBS,vent baffles shall be installed at the soffits of the attic such th
29、atattic ventilation air flows are maintained in accordance withapplicable building codes.7. Installation Guidelines-New and Retrofit Buildings7.1 Material Handling:7.1.1 The radiant barrier material shall be handled inaccordance with the manufacturers instructions, shall be keptdry, and shall not be
30、 in contact with the ground or sources ofwater.7.1.2 The radiant barrier material shall not be placed incontact with corrosive building materials.7.2 Performance Considerations:7.2.1 The performance of the RBS depends on adherence tomanufacturers recommendations. Manufacturers installationinstructio
31、ns and all applicable building codes shall be fol-lowed. The manufacturer shall provide the product informationsheet(s) that specify the products intended use(s), applicationmethod(s), health and safety considerations, and materialproperties per Specification C1313.7.2.2 The performance of the RBS i
32、s dependent on thepresence of an open airspace adjacent to at least one low-emittance surface.7.2.3 The performance of the RBS will be adversely af-fected by foreign materials on the low-emittance surface.Before installation, foreign materials shall be removed usingmanufacturers instructions, taking
33、 care not to damage theradiant barrier material.7.2.4 The performance of a radiant barrier will be reducedby a corrosive environment. In some instances, severe pollut-ants react with the low-emittance surface causing an increase inthe emittance of the material. When such conditions exist, theowner/b
34、uilder shall be informed that these conditions mayresult in material degradation and a decrease in RBS perfor-mance.7.2.5 In some instances, the performance of a radiant barrierwill be reduced by the presence of moisture on the low-emittance surface. Such conditions may be temporary or longterm and
35、the manufacturer shall be consulted to determine theapplicability of RBS when these conditions are expected tooccur.7.2.6 The performance of the RBS will be adversely af-fected by the accumulation of dust over time on the low-emittance surface. RBS shall be installed to avoid the settle-ment of dust
36、 on the radiant barrier surface. Dust is not aconcern on a downward facing RBS.7.2.7 Damaged areas will result in loss of performance andshall be repaired in accordance with the manufacturers in-structions.7.3 Installation Precautions:7.3.1 In areas in which radiant barrier materials are to beinstal
37、led, the applicator shall provide clearance around lightingC1743 102fixtures, motors, fans, blowers, heaters, flues, chimneys, andother heat-producing electrical and mechanical devices.7.3.1.1 The applicator shall provide 3-in. (75-mm) mini-mum clearance around all sides of recessed lighting fixture
38、sunless such fixtures are approved for installation in directcontact with radiant barrier materials. Such fixtures includefixture wiring compartments, ballasts, and other heat-producing devices. These devices shall not be covered unlessthey are specifically approved for operation when covered.7.3.1.
39、2 The applicator shall provide the minimum clear-ances specified in NFPA 54. Provide a 2-in. (50-mm) minimumclearance from the outside face of the masonry around masonrychimneys or masonry enclosing a flue. For vents, vent connec-tors, and chimneys other than masonry, provide minimumclearances as sp
40、ecified in NFPA 211.7.3.1.3 The operative material of most RBS is a metallic foilor vapor deposition of a metal on a substrate. Therefore, radiantbarrier materials can provide an extremely high resistance towater vapor transmission. Radiant barriers shall not be in-stalled so as to lead to moisture
41、accumulation and deteriorationin the structure. Some radiant barriers are produced to providelow resistance to water vapor transmission. High vaporpermeable- house wraps and perforated products are examples.7.3.1.4 In wood or steel framed buildings (new or retrofit),a perforated radiant barrier shal
42、l always be used when ceilinginsulation is installed, such as in roof or sidewall installations,in direct contact with the radiant barrier (cold-winter side). Ifthe radiant barrier is below or next to an unfaced insulation inthe wall or roof (warm-winter side), a nonperforated radiantbarrier shall b
43、e used.7.3.1.5 Regardless of construction type, all radiant barriermaterials that are installed with the low-emittance material(s)in direct contact with other metals shall be separated by anacceptable thermal break.7.4 Installation:7.4.1 Determine that the RBS material and installation meetthe follo
44、wing criteria:7.4.1.1 Testing and certificationThe materials shall meetall the requirements of Specification C1313 as well as complywith all certification and codes governing the use and installa-tion of radiant barriers.7.4.1.2 InstallationThe installer or applicator shall installthe RBS according
45、to the manufacturers installation guide-lines. In addition, the following minimum guideline shall beused 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
46、 of the roof deck facing towards the interior(Fig. 1. A perforated RBS is always required for this type ofinstallation. A single- or double-sided radiant barrier materialshall be used in the deck-applied installation, as long as alow-emittance surface (dull or shiny) faces downward;(b) Draped over t
47、he rafters or trusses (top chord) beforesheeting the roof (Fig. 2);(c) Installed between the rafters or top chords of the trusses(Fig. 3);(d) Secured to the bottom surface of the rafters or truss (topchord) (Fig. 4); and(e) Shall maintain a minimum 112-in. (3.8-cm) airspace at thecenter of the truss
48、/rafter span between the radiant barriersurface and the underside of the roof deck in installations (b)through (d), and a perforated radiant barrier is not required inthese installations (Figs. 2-4). Gable end walls and all othervertical attic surfaces above the ceiling insulation, such as kneewalls
49、 and division walls in multi-family housing, shall becovered by either a single- or double-sided radiant barrier,perforated or not, installed with a low-emittance surface facingthe attic cavity for visual inspection purposes (Fig. 7).NOTE 2In retrofit and new construction, secure a perforatedradiant barrier directly to the underside portion of the roofdeck, over the eave or soffit, so that the barriers coverageextends at least 3 in. (7.6 cm) beyond the top plate of thesidewall without being in contact with any ceiling insulationonce it is installed. In an effo
