1、Designation: D4756 13D4756 15 An American National StandardStandard Practice forInstallation of Rigid Poly(Vinyl Chloride) (PVC) Siding andSoffit1This standard is issued under the fixed designation D4756; the number immediately following the designation indicates the year oforiginal adoption or, in
2、the case 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. Scope*1.1 This practice covers the minimumbasic requirements for and the methods of installat
3、ion of rigid vinyl siding, soffits, andaccessories on the exterior wall and soffit areas of buildings. In all applications, refer also to the specific manufacturers instructionsfor installation.installation instructions and the requirements of applicable building codes.1.2 This practice covers aspec
4、ts of installation relating to effectiveness and durability in service.1.3 The various application systems are located in the following sections of this practice:Substrate, Surface Preparation Section 8Application of Horizontal Siding Section 9Application of Vertical Siding Section 10Application of
5、Soffits and Fascia Section 11Special Details Section 121.4 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 information only and are not considered standard.1.5 This standard does not p
6、urport 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.NOTE 1There is no known ISO equivalent to thi
7、s standard.2. Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD1600 Terminology for Abbreviated Terms Relating to PlasticsD3679 Specification for Rigid Poly(Vinyl Chloride) (PVC) SidingD4477 Specification for Rigid (Unplasticized) Poly(Vinyl Chloride) (PVC) SoffitE631 Te
8、rminology of Building ConstructionsE2112 Practice for Installation of Exterior Windows, Doors and Skylights3. Terminology3.1 GeneralDefinitions are in accordance with Terminologies D883 and E631 and abbreviations with Terminology D1600unless otherwise indicated.3.2 Definitions of Terms Specific to T
9、his Standard:3.2.1 backerboarda flat material used on the face of the house, applied between the studs and the siding (or over existing wallsurface) to provide an even surface for the installation of the vinyl siding.3.2.2 buttlockthe bottom of a siding or soffit panel, or accessory piece, opposite
10、the nail hem, which locks onto the precedingpanel.1 This practice is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.24 on Plastic Building Products.Current edition approved Oct. 1, 2013Feb. 1, 2015. Published October 2013February 2015. O
11、riginally approved in 1991. Last previous edition approved in 20062013 asD4745 06.D4745 13. DOI: 10.1520/D4756-13.10.1520/D4756-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume informat
12、ion, refer to the standards Document Summary page on the ASTM website.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 depic
13、t all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM Internationa
14、l, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.3 crimpsmall protrusions, typically approximately 12 in. (12.7 mm) long, 18 in. (3.2 mm) wide, and projecting 18 in. (3.2mm) formed by a crimper (snaplock punch). (See Fig. 2.)3.2.4 crimpera special hand tool
15、designed to form crimps (snaplock ears) intended to hold partial panels in place. (See Fig.2.)3.2.5 face nailthe action of fastening directly on to the “face,” or exposed surface, of a panel (instead of using the nail slot).3.2.6 fasciathe trim covering the ends of roof rafters. (See Fig. 1.)3.2.6.1
16、 fascia boarda board attached to the ends of the rafters between the roofing material and the soffit overhang.3.2.6.2 fascia cap or coverthe covering around a fascia board.3.2.7 flashingspecial membrane pieces or manufactured trim pieces used to supplement siding panels in weather protectionaround j
17、oints, penetrations, and openings, such as windows, doors, mechanical penetrations, and roof-wall intersections, designedand intended to move incidental water to the building exterior.3.2.8 furring/furring stripa wooden or steel framing material, usually a nominal 1 by 2 in. (25.4 by 50.8 mm) used t
18、o eventhe surface in preparation for installation of siding. To “fur” a surface means to apply these strips.3.2.9 nailslot puncha special hand tool used to create slots for attachment of field-modified siding or accessories. (See Fig.3.)3.2.10 rake (roof)the inclined, usually projecting edge of a sl
19、oping roof.3.2.11 rake (wall)the board or molding placed along the sloping sides of a gable to cover the 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) of roof overhangs.3.2.15 starter s
20、tripan accessory applied directly to the surface of the building and used to secure the first course of siding tothe home. Starter strips can either be a part manufactured for the specific purpose or created by cutting the nailing hem and adjacentlock from a siding panel.3.2.16 undersill trim (utili
21、ty trim)an accessory strip used to receive and hold the crimped edge of horizontal or vertical sidingthat has had its normal lock removed.3.2.17 zip tool (unlocking tool)a special hand tool used to separate interlocked siding panels. (See Fig. 2.)FIG. 1 Terminology for Buildings, Siding and Accessor
22、iesD4756 1524. Delivery of Materials4.1 All manufactured materials shall be delivered in the original packages, containers, or bundles bearing the size or typeproduct, or both, brand name, and manufacturer (or supplier) identification, manufacturers lot number, and the ASTMspecification to which it
23、conforms.5. Protection of Materials5.1 Do not store in any location or in any manner where the temperature of the siding, soffit or accessories is likely to exceed130F (54C).5.2 Store the cartons on a flat surface and support the entire length of the cartons.5.3 Store the cartons away from areas whe
24、re falling objects or other construction activity could impact the cartons. Keep thecartons dry.5.4 Do not store the cartons in stacks more than 6 boxes high.6. Environmental Conditions6.1 Vinyl siding and accessories will expand when heated and contract when cooled. If siding is installed in hot we
25、ather andthe siding is very warm it will be partially “expanded.” Provide allowance for more future “contraction” than expansion.6.2 Leave 14 in. (6.4 mm) clearance between the ends of panels and trim and any receiver such as J-channels and corner poststo allow for thermal expansion. If installing d
26、uring weather colder than 40F (4.4C), increase the minimum clearance to 38 in.(9.5 mm) to allow for additional expansion during warmer weather.7. Materials7.1 Horizontal Wall SidingSee Specification D3679.7.2 Vertical Wall SidingSee Specification D36797.3 Sofft PanelsSee Specification D4477.7.4 Acce
27、ssories:7.4.1 Starter StripOf two types: for horizontal siding and for vertical siding For horizontal siding made of poly(vinyl chloride)or corrosion-resistant metal.7.4.2 Corner PostsOf two types: for inside corners and for outside corners of poly(vinyl chloride).7.4.3 Trim ChannelsProduced of poly
28、(vinyl chloride) in a variety of designs and sizes for use around openings and edges ofwall and soffit surfaces. (See Fig. 5.)7.5 Fasteners:FIG. 2 Siding Installation ToolsD4756 1537.5.1 NailsCorrosion-resistant with head diameter 516 in. (7.9 mm) minimum, shank diameter 18 in. (3.2 mm), lengthsuffi
29、cient to penetrate not less than 34 in. (19 mm) into framing or furring.7.5.2 StaplesCorrosion-resistant, 16 gage minimum, with 38 to 12-in. (9.5 to 12.7-mm) crown, length sufficient to penetratenot less than 34 in. (19 mm) into framing or furring.7.5.3 ScrewsCorrosion resistant, self-tapping type,
30、No. 8 truss head or pan head length sufficient to penetrate wall thicknessof steel stud or 34 in. into framing or furring.NOTE 2To minimize the possibility of any color variation use material from a single manufacturers lot number for application to one building.FIG. 3 Typical Siding ProfilesFIG. 4
31、Typical Soffit ProfilesFIG. 5 Typical Siding AccessoriesD4756 1548. Substrate, Surface Preparation8.1 Water-resistive BarrierVinyl siding must be installed over a water-resistive barrier system that includes (1) a continuouswater-resistive material, and (2) properly integrated flashing around all pe
32、netrations and where vinyl siding interfaces with otherbuilding products. Refer to the vinyl siding manufacturers installation instructions and the minimum requirements of the localbuilding code for specific product applications and requirements.8.2 All caulking to prevent moisture penetration must
33、be done before siding application. Do not use caulk where it could restrictthe normal expansion of the vinyl siding.8.3 Apply vinyl siding over sheathing or other rigid surface that provides a smooth, flat surface. Do not apply vinyl sidingdirectly to studs without sheathing. If permitted by the vin
34、yl siding manufacturer, a contoured foam underlayment fitted for thespecific style of vinyl siding is permitted to be utilized. Apply over wood furring strips when the underlying surface is uneven.8.4 Drive fasteners into framing or furring. Driving of fasteners directly into sheathing or existing s
35、iding is permitted inaccordance with the siding manufacturers instructions, where substantiated by windload testing conducted in accordance withSpecification D3679.8.5 On existing structures, secure any loose boards, replace any rotted ones, recaulk around windows, doors, and other areasas necessary
36、 to protect from moisture penetration prior to the installation of siding or accessories. Use furring as needed to createan even surface.8.6 FlashingRefer to Practice E2112 for installation of flashing around windows, doors, penetrations and points of interfacebetween the vinyl siding and other buil
37、ding components. If available, also refer to the instructions provided by the manufacturerof the window, door, or other object that will penetrate the siding.8.7 FurringMasonry and uneven surfaces, as examples, require wood furring strips nominal 1 by 2 in. (25.4 by 50.8 mm)applied vertically and ty
38、pically spaced 16 in. (406 mm) on center for horizontal siding and applied horizontally and typicallyspaced 12 in. (305 mm) on center for vertical siding.9. Application of Horizontal Siding9.1 General RequirementsVinyl siding and accessories expand and contract as much as 12 in. (12.7 mm) over a 12
39、ft (3.65m) length with changes in temperature. For this reason adhere to the following provisions:9.1.1 When applied, vinyl siding products must be attached “loosely,” leaving approximately a 132-in. (0.8-mm) space betweenthe vinyl and the fastener head or crown to permit thermal movement. (See Fig.
40、 6.)9.1.2 Center fasteners in slots of siding and accessories to permit possible expansion and contraction. (See Fig. 7.) If a nail slotdoes not allow centering/securing into framing, furring, or other permitted nailable surface, use a nail hole slot punch to extendthe slot and allow centering of th
41、e fastener.9.1.3 Do not face nail siding panels. (See Fig. 8.)9.1.4 Allow clearance at panel ends for thermal expansion between corner posts, J-channels, and other receivers in accordancewith 6.2.9.2 Installation of AccessoriesAccessories, including starter strips, corner posts and door/window trim,
42、 are installed prior toapplication of the siding, adhering to the provisions of 9.1 and those which follow.9.2.1 Corner PostsOutside and inside corner posts will start 14 in. (6.4 mm) below the top, and end 34 in. (19.1 mm) belowthe bottom edge of the first course of siding which will be installed l
43、ater.Attach each leg of the corner posts with fasteners, spacednot over 12 in (305 mm) apart centered in nailing slots except the top fastener that is located at the upper end of a nailing slot.9.2.1.1 If more than one length of corner post is required, lap the upper piece over the lower piece by cu
44、tting away 1 in. (25.4mm) of the nailing flange on the top piece. Lap 34 in. (19 mm) allowing 14 in. (6.4 mm) for expansion. (See Fig. 9.)9.2.1.2 As an alternative for inside corners, install two J-channels with the web of one abutting the adjacent wall and the webof the other J-channel abutting the
45、 shorter outer flange of the first J-channel. Attach as specified in 9.1.1.9.2.2 Starter StripDetermine the lowest point along the area to receive siding and install starter strips located so that thebottom edge of the initial course of siding will be on a level line and typically approximately 14 i
46、n. (6.4 mm) below that point.Allow space for corner posts, J-channels, etc., and keep ends of starter strips 14 to 12 in. (6.4 to 12.7 mm) apart. Space fastenersnot more than 10 in. (254 mm) apart, centered in nail slots.FIG. 6 Attachment of Vinyl SidingD4756 1559.2.3 Door/Window Trim:9.2.3.1 Instal
47、l flashing around windows and doors in accordance with 8.1 and 8.6 before installing trim.9.2.3.2 J-channel is installed on each side and the top of door and window frames, and under window sills. Always install thebottom J-channel first, followed by the side channels, and then the top channel.9.2.3
48、.3 Extend the bottom and top J-channel the length of the window frame plus the width of the visible face of the sideJ-channels (typically 34 in. (19 mm) on each side. Extend the side J-channels the height of the window or door frame plus thewidth of the visible face of the top and bottom J-channels.
49、9.2.3.4 In the bottom J-channel, cut a notch in the web at each end the width of the visible face of the side J-channel. In bothside J-channels, cut a notch at the top end and a tab at the bottom end. Miter the bottom ends of the visible face of the sideJ-channels at a 45 degree angle. In the top J-channel cut along the bends at both ends of the J-channel to create a tab the samelength as the exposed face of the side J-channel. Miter the end of the visible face of both ends of the top J-channel at a 45
