ASTM D4477-24

Standard Specification for Rigid (Unplasticized) Poly(Vinyl Chloride) (PVC) Soffit

ABSTRACT
This specification establishes the physical requirements and test methods for extruded single-wall soffits manufactured from rigid (unplasticized) poly(vinyl chloride) (PVC) compounds. The PVC compound when extruded into soffit shall maintain uniform color and be free of any visual surface or structural changes such as peeling, chipping, cracking, flaking, or pitting. Materials shall undergo testing and shall conform accordingly to requirements in terms of dimension (length, width, and thickness), camber, initial impact resistance, coefficient of linear expansion, gloss, deflection, and color.
SCOPE
1.1 This specification establishes requirements and test methods for the materials, dimensions, camber, impact strength, expansion, and appearance of extruded single-wall soffit manufactured from rigid (unplasticized) PVC compound. Methods of indicating compliance with this specification are also provided.  
1.2 The use of PVC recycled plastic in this product shall be in accordance with the requirements in Section 4.  
1.3 Soffit produced to this specification shall be installed in accordance with the manufacturer's installation instructions for the specific product to be installed.  
Note 1: Information with regard to soffit maintenance shall be obtained from the manufacturer.  
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.5 The following precautionary caveat pertains to the test method portion only, Section 6 of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 2: There is no known ISO equivalent to this standard.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Mar-2024
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.24 - Plastic Building Products

Relations

• Replaces: ASTM D4477-22 - Standard Specification for Rigid (Unplasticized) Poly(Vinyl Chloride) (PVC) Soffit
• Effective Date: 01-Apr-2024
• Referred By: ASTM D3679-24 - Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Siding
• Effective Date: 01-Apr-2024
• Referred By: ASTM E2266-22 - Standard Guide for Design and Construction of Low-Rise Frame Building Wall Systems to Resist Water Intrusion
• Effective Date: 01-Apr-2024
• Referred By: ASTM D4803-24 - Standard Test Method for Predicting Heat Buildup in PVC Building Products
• Effective Date: 01-Apr-2024

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D4477 − 24 An American National Standard
Standard Specification for
1
Rigid (Unplasticized) Poly(Vinyl Chloride) (PVC) Soffit
This standard is issued under the fixed designation D4477; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification establishes requirements and test
D618 Practice for Conditioning Plastics for Testing
methods for the materials, dimensions, camber, impact
D635 Test Method for Rate of Burning and/or Extent and
strength, expansion, and appearance of extruded single-wall
Time of Burning of Plastics in a Horizontal Position
soffit manufactured from rigid (unplasticized) PVC compound.
D696 Test Method for Coefficient of Linear Thermal Expan-
Methods of indicating compliance with this specification are
sion of Plastics Between −30°C and 30°C with a Vitreous
also provided.
Silica Dilatometer
1.2 The use of PVC recycled plastic in this product shall be D883 Terminology Relating to Plastics
D1600 Terminology for Abbreviated Terms Relating to Plas-
in accordance with the requirements in Section 4.
3
tics (Withdrawn 2024)
1.3 Soffit produced to this specification shall be installed in
D2244 Practice for Calculation of Color Tolerances and
accordance with the manufacturer’s installation instructions for
Color Differences from Instrumentally Measured Color
the specific product to be installed.
Coordinates
D2457 Test Method for Specular Gloss of Plastic Films and
NOTE 1—Information with regard to soffit maintenance shall be
Solid Plastics
obtained from the manufacturer.
D3892 Practice for Packaging/Packing of Plastics
1.4 The values stated in inch-pound units are to be regarded
D4226 Test Methods for Impact Resistance of Rigid Poly-
as standard. The values given in parentheses are mathematical
(Vinyl Chloride) (PVC) Building Products
conversions to SI units that are provided for information only
D5033 Guide for Development of ASTM Standards Relating
and are not considered standard.
to Recycling and Use of Recycled Plastics (Withdrawn
3
2007)
1.5 The following precautionary caveat pertains to the test
D5947 Test Methods for Physical Dimensions of Solid
method portion only, Section 6 of this specification. This
Plastics Specimens
standard does not purport to address all of the safety concerns,
E631 Terminology of Building Constructions
if any, associated with its use. It is the responsibility of the user
E1753 Practice for Use of Qualitative Chemical Spot Test
of this standard to establish appropriate safety, health, and
Kits for Detection of Lead in Dry Paint Films
environmental practices and determine the applicability of
regulatory limitations prior to use.
3. Terminology
3.1 Definitions—Definitions are in accordance with Termi-
NOTE 2—There is no known ISO equivalent to this standard.
nologies D883, D1600, and E631, unless otherwise specified.
1.6 This international standard was developed in accor-
3.2 Definitions of Terms Specific to This Standard:
dance with internationally recognized principles on standard-
3.2.1 nominal, (as related to dimensions of vinyl soffıts),
ization established in the Decision on Principles for the
adj—the value that a manufacturer consistently uses to repre-
Development of International Standards, Guides and Recom-
sent a specific property or dimension of a vinyl soffit product in
mendations issued by the World Trade Organization Technical
public claims including, but not limited to, product literature,
Barriers to Trade (TBT) Committee.
advertisements, quotations, and certificates of conformance.
1 2
This specification is under the jurisdiction of ASTM Committee D20 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Plastics and is the direct responsibility of Subcommittee D20.24 on Plastic Building contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Products. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved April 1, 2024. Published April 2024. Originally the ASTM website.
3
approved in 1985. Last previous edition approved in 2022 as D4477 – 22. DOI: The last approved version of this historical standard is referenced on
10.1520/D4477-24. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

...

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. Because
it 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 version
of the standard as published by ASTM is to be considered the official document.
Designation: D4477 − 22 D4477 − 24 An American National Standard
Standard Specification for
1
Rigid (Unplasticized) Poly(Vinyl Chloride) (PVC) Soffit
This standard is issued under the fixed designation D4477; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Scope*
1.1 This specification establishes requirements and test methods for the materials, dimensions, camber, impact strength, expansion,
and appearance of extruded single-wall soffit manufactured from rigid (unplasticized) PVC compound. Methods of indicating
compliance with this specification are also provided.
1.2 The use of PVC recycled plastic in this product shall be in accordance with the requirements in Section 4.
1.3 Soffit produced to this specification shall be installed in accordance with Practice D4756. Reference shall also be made to the
manufacturer’s installation instructions for the specific product to be installed.
NOTE 1—Information with regard to soffit maintenance shall be obtained from the manufacturer.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.5 The following precautionary caveat pertains to the test method portion only, Section 6 of this specification. This standard
does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this
standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory
limitations prior to use.
NOTE 2—There is no known ISO equivalent to this standard.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D635 Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position
D696 Test Method for Coefficient of Linear Thermal Expansion of Plastics Between −30°C and 30°C with a Vitreous Silica
Dilatometer
1
This specification 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 May 1, 2022April 1, 2024. Published May 2022April 2024. Originally approved in 1985. Last previous edition approved in 20212022 as
D4477 – 21.D4477 – 22. DOI: 10.1520/D4477-22.10.1520/D4477-24.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D4477 − 24
D883 Terminology Relating to Plastics
3
D1600 Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)
D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
D2457 Test Method for Specular Gloss of Plastic Films and Solid Plastics
D3892 Practice for Packaging/Packing of Plastics
D4226 Test Methods for Impact Resistance of Rigid Poly(Vinyl Chloride) (PVC) Building Products
3
D4756 Practice for Installation of Rigid Poly(Vinyl Chloride) (PVC) Siding and Soffit (Withdrawn 2023)
3
D5033 Guide for Development of ASTM Standards Relating to Recycling and Use of Recycled Plastics (Withdrawn 2007)
D5947 Test Methods for Physical Dimensions of Solid Plastics Specimens
E631 Terminology of Building Constructions
E1753 Practice for Use of Qualitative Chemical Spot Test Kits for Detection of Lead in Dry Paint Films
3. Terminology
3.1 Definitions—Definitions are in accordance with Terminologies D883, D1600, and E631, unless otherwise specified.
3.2 Definitions of Terms Specific to This Standard:
3.2.1
...