ASTM D8484-23
(Specification)Standard Specification for Plastic Lumber Materials and Wood-Plastic Composite Materials Used as Exterior Wall Coverings
Standard Specification for Plastic Lumber Materials and Wood-Plastic Composite Materials Used as Exterior Wall Coverings
SCOPE
1.1 This specification is applicable to the use of plastic lumber materials and of wood-plastic composite materials, and no other plastic composite materials, used as exterior wall coverings, as part of an exterior wall assembly.
1.2 This specification is not applicable to the use of plastic lumber materials or of wood-plastic composite materials contained in exterior wall assemblies when not used as part of the exterior wall covering.
1.3 This specification is not applicable to the use of any of the following types of materials:
(a) poly(vinyl chloride) (PVC) siding (see Specification D3679, for standard vinyl siding, or Specification D7793, for insulated vinyl siding),
(b) polypropylene siding (see Specification D7254),
(c) wood (including lumber, plywood, engineered wood, coated wood, or painted wood).
1.4 This specification is not applicable to the use of plastic lumber materials or of wood-plastic composite materials in any application other than the one addressed in 1.1. In particular, this specification is not applicable to the use of plastic lumber materials or of wood-plastic composite materials as exterior deck boards, stair treads, handrails, guards, or soffits.
1.5 The values stated in inch-pound units are to be regarded as standard. Any SI units given in parentheses are for information only.
1.6 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 1: There is no known ISO equivalent to this standard.
1.7 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
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: D8484 − 23
Standard Specification for
Plastic Lumber Materials and Wood-Plastic Composite
1
Materials Used as Exterior Wall Coverings
This standard is issued under the fixed designation D8484; 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 Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 This specification is applicable to the use of plastic
Barriers to Trade (TBT) Committee.
lumber materials and of wood-plastic composite materials, and
no other plastic composite materials, used as exterior wall
2. Referenced Documents
coverings, as part of an exterior wall assembly.
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2.1 ASTM Standards:
1.2 This specification is not applicable to the use of plastic
D570 Test Method for Water Absorption of Plastics
lumber materials or of wood-plastic composite materials con-
D618 Practice for Conditioning Plastics for Testing
tained in exterior wall assemblies when not used as part of the
D883 Terminology Relating to Plastics
exterior wall covering.
D3679 Specification for Rigid Poly(Vinyl Chloride) (PVC)
1.3 This specification is not applicable to the use of any of Siding
the following types of materials: D5206 Test Method for Windload Resistance of Rigid Plas-
(a) poly(vinyl chloride) (PVC) siding (see Specification tic Siding
D3679, for standard vinyl siding, or Specification D7793, for D6341 Test Method for Determination of the Linear Coef-
insulated vinyl siding), ficient of Thermal Expansion of Plastic Lumber and
(b) polypropylene siding (see Specification D7254), Plastic Lumber Shapes Between –30 and 140°F (–34.4
(c) wood (including lumber, plywood, engineered wood, and 60°C)
coated wood, or painted wood). D6662 Specification for Polyolefin-Based Plastic Lumber
Decking Boards
1.4 This specification is not applicable to the use of plastic
D7032 Specification for Establishing Performance Ratings
lumber materials or of wood-plastic composite materials in any
for Wood-Plastic Composite and Plastic Lumber Deck
application other than the one addressed in 1.1. In particular,
Boards, Stair Treads, Guards, and Handrails
this specification is not applicable to the use of plastic lumber
D7254 Specification for Polypropylene (PP) Siding
materials or of wood-plastic composite materials as exterior
D7793 Specification for Insulated Vinyl Siding
deck boards, stair treads, handrails, guards, or soffits.
E84 Test Method for Surface Burning Characteristics of
1.5 The values stated in inch-pound units are to be regarded
Building Materials
as standard. Any SI units given in parentheses are for infor-
E119 Test Methods for Fire Tests of Building Construction
mation only.
and Materials
1.6 This standard does not purport to address all of the
E136 Test Method for Assessing Combustibility of Materials
safety concerns, if any, associated with its use. It is the Using a Vertical Tube Furnace at 750 °C
responsibility of the user of this standard to establish appro-
E176 Terminology of Fire Standards
priate safety, health, and environmental practices and deter- 2.2 Other Documents:
mine the applicability of regulatory limitations prior to use.
ASCE/SEI 7-2022 Minimum Design Loads and Associated
3
Criteria for Buildings and Other Structures
NOTE 1—There is no known ISO equivalent to this standard.
4
IBC 2024 International Building Code, 2024 Edition (IBC)
1.7 This international standard was developed in accor-
dance with internationally recognized principles on standard-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ization established in the Decision on Principles for the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
1 3
This test method is under the jurisdiction of ASTM Committee D20 on Plastics Available from American Society of Civil Engineers (ASCE), 1801 Alexander
and is the direct responsibility of Subcommittee D20.20 on Plastic Lumber. Bell Dr., Reston, VA 20191, http://www.asce.org.
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Current edition approved May 1, 2023. Published May 2023. DOI: 10.1520/ Available from International Code Council (ICC), 500 New Jersey Ave., NW,
D8484-23 6th Floor, Washington, DC 20001, http://www.iccsafe.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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