1、Designation: D 4756 06An American National StandardStandard Practice forInstallation of Rigid Poly(Vinyl Chloride) (PVC) Siding andSoffit1This standard is issued under the fixed designation D 4756; the number immediately following the designation indicates the year oforiginal adoption or, in the cas
2、e of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This practice covers the minimum requirements for andthe methods of installation of rigid
3、 vinyl siding, soffits, andaccessories on the exterior wall and soffit areas of buildings. Inall applications, refer also to the specific manufacturersinstructions for installation.1.2 This practice covers aspects of installation relating toeffectiveness and durability in service.1.3 The various app
4、lication systems are located in thefollowing sections of this practice:Substrate, Surface Preparation Section 8Application of Horizontal Siding Section 9Application of Vertical Siding Section 10Application of Soffits and Fascia Section 11Special Details Section 121.4 The values stated in inch-pound
5、units are to be regardedas the standard. The SI units given in parentheses are forinformation only.1.5 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 healt
6、h practices and determine the applica-bility of regulatory limitations prior to use.NOTE 1There is no known ISO equivalent to this standard.2. Referenced Documents2.1 ASTM Standards:2D 883 Terminology Relating to PlasticsD 1600 Terminology for Abbreviated Terms Relating toPlasticsD 3679 Specificatio
7、n for Rigid Poly(Vinyl Chloride) (PVC)SidingD 4477 Specification for Rigid (Unplasticized) Poly(VinylChloride) (PVC) SoffitE 631 Terminology of Building ConstructionsE2112 Practice for Installation of Exterior Windows, Doorsand Skylights3. Terminology3.1 GeneralDefinitions are in accordance with Ter
8、mi-nologies D 883 and E 631 and abbreviations with TerminologyD 1600 unless otherwise indicated.3.2 Definitions of Terms Specific to This Standard:3.2.1 backerboarda flat material used on the face of thehouse, applied between the studs and the siding (or overexisting wall surface) to provide an even
9、 surface for theinstallation of the vinyl siding.3.2.2 buttlockthe bottom of a siding or soffit panel, oraccessory piece, opposite the nail hem, which locks onto thepreceding panel.3.2.3 crimpsmall protrusions, typically approximately12in. (12.7 mm) long,18 in. (3.2 mm) wide, and projecting18 in.(3.
10、2 mm) formed by a crimper (snaplock punch). (See Fig. 2.)3.2.4 crimpera special hand tool designed to form crimps(snaplock ears) intended to hold partial panels in place. (SeeFig. 2.)3.2.5 face nailthe action of fastening directly on to the“face,” or exposed surface, of a panel (instead of using the
11、 nailslot).3.2.6 fasciathe trim covering the ends of roof rafters. (SeeFig. 1.)3.2.6.1 fascia boarda board attached to the ends of therafters between the roofing material and the soffit overhang.3.2.6.2 fascia cap or coverthe covering around a fasciaboard.1This practice is under the jurisdiction ofA
12、STM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.24 on Plastic Building Products.Current edition approved April 1, 2006. Published May 2006. Originallyapproved in 1991. Last previous edition approved in 2003 as D 4745 03.2For referenced ASTM standards, visit the ASTM
13、 website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr H
14、arbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.7 flashingspecial membrane pieces or manufacturedtrim pieces used to supplement siding panels in weatherprotection around joints, penetrations, and openings, such aswindows, doors, mechanical penetrations, and roof-wall in
15、ter-sections, designed and intended to move incidental water to thebuilding exterior.3.2.8 furring/furring stripa wooden or steel framing ma-terial, usually a nominal 1 by 2 in. (25.4 by 50.8 mm) used toeven the surface in preparation for installation of siding. To“fur” a surface means to apply thes
16、e strips.3.2.9 nailslot puncha special hand tool used to createslots for attachment of field-modified siding or accessories.(See Fig. 3.)3.2.10 rake (roof)the inclined, usually projecting edge ofa sloping roof.3.2.11 rake (wall)the board or molding placed along thesloping sides of a gable to cover t
17、he ends of the siding.3.2.12 snaplock earssee crimp and Fig. 2.3.2.13 snaplock punchsee crimper and Fig. 2.3.2.14 sofftthe underside surface (typically horizontal) ofroof overhangs.3.2.15 starter stripan accessory applied directly to thesurface of the building and used to secure the first course ofs
18、iding to the home. Starter strips can either be a part manufac-tured for the specific purpose or created by cutting the nailinghem and adjacent lock from a siding panel.3.2.16 undersill trim (utility trim)an accessory strip usedto receive and hold the crimped edge of horizontal or verticalsiding tha
19、t has had its normal lock removed.3.2.17 zip tool (unlocking tool)a special hand tool used toseparate interlocked siding panels. (See Fig. 2.)4. Delivery of Materials4.1 All manufactured materials shall be delivered in theoriginal packages, containers, or bundles bearing the size ortype product, or
20、both, brand name, and manufacturer (orsupplier) identification, manufacturers lot number, and theASTM specification to which it conforms.FIG. 1 Terminology for Buildings, Siding and AccessoriesFIG. 2 Siding Installation ToolsD47560625. Protection of Materials5.1 Do not store in any location or in an
21、y manner where thetemperature of the siding, soffit or accessories is likely toexceed 130F (54C).5.2 Store the cartons on a flat surface and support the entirelength of the cartons.5.3 Store the cartons away from areas where falling objectsor other construction activity could impact the cartons. Kee
22、pthe cartons dry.5.4 Do not store the cartons in stacks more than 12 boxeshigh.6. Environmental Conditions6.1 Vinyl siding and accessories will expand when heatedand contract when cooled. If siding is installed in hot weatherand the siding is very warm it will be partially “expanded.”Provide allowan
23、ce for more future “contraction” than expan-sion.6.2 Leave14 in. (6.4 mm) clearance between the ends ofpanels and trim and any receiver such as J-channels and cornerposts to allow for thermal expansion. If installing duringweather colder than 40F (4.4C), increase the minimumclearance to38 in. (9.5 m
24、m) to allow for additional expansionduring warmer weather.7. Materials7.1 Horizontal Wall SidingSee Specification D 3679.7.2 Vertical Wall SidingSee Specification D 36797.3 Sofft PanelsSee Specification D 4477.7.4 Accessories:7.4.1 Starter StripOf two types: for horizontal siding andfor vertical sid
25、ing of poly(vinyl chloride) or corrosion-resistantmetal.7.4.2 Corner PostsOf two types: for inside corners andfor outside corners of poly(vinyl chloride).7.4.3 Trim ChannelsProduced of poly(vinyl chloride) in avariety of designs and sizes for use around openings and edgesof wall and soffit surfaces.
26、 (See Fig. 5.)7.5 Fasteners:7.5.1 NailsCorrosion-resistant with head diameter516 in.(7.9 mm) minimum, shank diameter18 in. (3.2 mm), lengthsufficient to penetrate not less than34 in. (19 mm) into framingor furring.7.5.2 StaplesCorrosion-resistant, 16 gage minimum, with38 to12-in. (9.5 to 12.7-mm) cr
27、own, length sufficient topenetrate not less than34 in. (19 mm) into framing or furring.7.5.3 ScrewsCorrosion resistant, self-tapping type, No. 8truss head or pan head length sufficient to penetrate wallthickness of steel stud or34 in. into framing or furring.NOTE 2To minimize the possibility of any
28、color variation usematerial from a single manufacturers lot number for application to onebuilding.8. Substrate, Surface Preparation8.1 Weather-resistant BarrierVinyl siding must be in-stalled over a weather-resistant barrier system that includes (1)a continuous weather-resistant material, and (2) pr
29、operly inte-grated flashing around all penetrations and where vinyl sidinginterfaces with other building products. Refer to the vinylFIG. 3 Typical Siding ProfilesFIG. 4 Typical Soffit ProfilesD4756063siding manufacturers installation instructions and the mini-mum requirements of the local building
30、code for specificproduct applications and requirements.8.2 All caulking to prevent moisture penetration must bedone before siding application. Do not use caulk where it couldrestrict the normal expansion of the vinyl siding.8.3 Apply vinyl siding over sheathing or other solid surfacethat provides a
31、smooth, flat surface. Do not apply vinyl sidingdirectly to studs without sheathing. If permitted by the vinylsiding manufacturer, a contoured foam underlayment fitted forthe specific style of vinyl siding is permitted to be utilized.Apply over wood furring strips when the underlying surface isuneven
32、.8.4 Drive fasteners into framing or furring. Driving offasteners directly into sheathing or existing siding is permittedin accordance with the siding manufacturers instructions,where substantiated by windload testing conducted in accor-dance with Specification D 3679.8.5 On existing structures, sec
33、ure any loose boards, replaceany rotted ones, recaulk around windows, doors, and otherareas as necessary to protect from moisture penetration prior tothe installation of siding or accessories. Use furring as neededto create an even surface.8.6 FlashingRefer to Practice E2112for installation offlashi
34、ng around windows, doors, penetrations and points ofinterface between the vinyl siding and other building compo-nents. If available, also refer to the instructions provided by themanufacturer of the window, door, or other object that willpenetrate the siding.8.7 FurringMasonry and uneven surfaces, a
35、s examples,require wood furring strips nominal 1 by 2 in. (25.4 by 50.8mm) applied vertically and typically spaced 16 in. (406 mm)on center for horizontal siding and applied horizontally andtypically spaced 12 in. (305 mm) on center for vertical siding.9. Application of Horizontal Siding9.1 General
36、RequirementsVinyl siding and accessoriesexpand and contract as much as12 in. (12.7 mm) over a 12 ft(3.65 m) length with changes in temperature. For this reasonadhere to the following provisions:9.1.1 When applied, vinyl siding products must be attached“loosely,” leaving approximately a132-in. (0.8-m
37、m) spacebetween the vinyl and the fastener head or crown to permitthermal movement. (See Fig. 6.)9.1.2 Center fasteners in slots of siding and accessories topermit possible expansion and contraction. (See Fig. 7.)9.1.3 Do not face nail siding panels. (See Fig. 8.)9.1.4 Allow clearance at panel ends
38、for thermal expansionbetween corner posts, J-channels, and other receivers inaccordance with 6.2.9.2 Installation of AccessoriesAccessories, includingstarter strips, corner posts and door/window trim, are installedprior to application of the siding, adhering to the provisions of9.1 and those which f
39、ollow.9.2.1 Starter StripDetermine the lowest point along thearea to receive siding and install starter strips located so thatthe bottom edge of the initial course of siding will be on a levelline and typically approximately14 in. (6.4 mm) below thatpoint. Allow space for corner posts, J-channels, e
40、tc., and keepends of starter strips14 to12 in. (6.4 to 12.7 mm) apart. Spacefasteners not more than 10 in. (254 mm) apart, centered in nailslots.9.2.2 Corner PostsOutside and inside corner posts willstart14 in. (6.4 mm) below the top, and end34 in. (19.1 mm)below the bottom edge of the first course
41、of siding which willbe installed later. Attach each leg of the corner posts withfasteners, spaced not over 12 in (305 mm) apart centered innailing slots except the top fastener that is located at the upperend of a nailing slot.9.2.2.1 If more than one length of corner post is required,lap the upper
42、piece over the lower piece by cutting away 1 in.(25.4 mm) of the nailing flange on the top piece. Lap34 in. (19mm) allowing14 in. (6.4 mm) for expansion. (See Fig. 9.)9.2.2.2 As an alternative for inside corners, install twoJ-channels with the web of one abutting the adjacent wall andthe web of the
43、other J-channel abutting the shorter outer flangeof the first J-channel. Attach as specified in 9.1.1.9.2.3 Door/Window Trim:9.2.3.1 Install flashing around windows and doors in accor-dance with 8.1 and 8.6 before installing trim.9.2.3.2 J-channel is installed on each side and the top ofdoor and win
44、dow frames, and under window sills. Alwaysinstall the bottom J-channel first, followed by the side chan-nels, and then the top channel.FIG. 5 Typical Siding AccessoriesFIG. 6 Attachment of Vinyl SidingD47560649.2.3.3 Extend the bottom and top J-channel the length ofthe window frame plus the width of
45、 the visible face of the sideJ-channels (typically34 in. (19 mm) on each side. Extend theside J-channels the height of the window or door frame plus thewidth of the visible face of the top and bottom J-channels.9.2.3.4 In the bottom J-channel, cut a notch in the web ateach end the width of the visib
46、le face of the side J-channel. Inboth side J-channels, cut a notch at the top end and a tab at thebottom end. Miter the bottom ends of the visible face of theside J-channels at a 45 degree angle. In the top J-channel cutalong the bends at both ends of the J-channel to create a tab thesame length as
47、the exposed face of the side J-channel. Miter theend of the visible face of both ends of the top J-channel at a 45degree angle.9.2.3.5 Install the bottom J-channel. Install each of the sideJ-channels, with the mitered visible face over the face of thebottom J-channel. Bend the tabs in the side J-cha
48、nnels into thebottom J-channel. (See Fig. 10.)9.2.3.6 Install optional head flashing across the top of thewindow or door frame. Install the top J-channel with themitered face over the face of the side J-channels. Bend the tabsin the top J-channel into the side J-channels. (See Fig. 11.)9.3 Siding Pa
49、nel Installation:9.3.1 General ConsiderationsTo make overlapped sidingjoints less noticeable on the sides of a building, start at the rearcorner and install toward the front. On the front and rear ofbuildings start at the corners and install toward the entrancedoor. Avoid use of short panel lengths under 24 in. (610 mm).(See Fig. 13.) When lapping, place factory-cut ends of panelson top of field-cut ends for best appearance.9.3.2 Engage the bottom of the first panel and the starterstrip. If backerboard insulati
