ASTM F2419-05
(Practice)Standard Practice for Installation of Thick Poured Gypsum Concrete Underlayments and Preparation of the Surface to Receive Resilient Flooring
Standard Practice for Installation of Thick Poured Gypsum Concrete Underlayments and Preparation of the Surface to Receive Resilient Flooring
SIGNIFICANCE AND USE
This practice provides minimum recommendations for the installation of thick poured gypsum concrete floor underlayments suitable to receive resilient floor coverings. This practice establishes the proper preparation, installation and quality control for thick poured gypsum concrete floor underlayments.
Actual requirements for thick poured gypsum concrete underlayments are generally included as part of project plans or specifications and may vary from the recommendations set forth in this practice. Project plans or specifications, or both, shall supersede the recommendations set forth in this practice.
SCOPE
1.1 This practice covers the installation and preparation of the thick poured gypsum concrete underlayments over wood structural panel subfloors in commercial structures or over concrete floors in commercial structures and the preparation of the thick poured gypsum concrete underlayment surface prior to the installation of resilient flooring in commercial buildings.
1.2 This practice covers the factors that are required to be controlled while installing thick poured gypsum concrete underlayment as a base for resilient flooring.
1.3 This practice does not cover the structural adequacy of the wood structural panel subfloor or concrete subfloor. The structural integrity of assemblies is governed by local building codes.
1.4 This practice does not supersede in any manner the thick poured gypsum concrete underlayment manufacturers, adhesive manufacturers or resilient flooring manufacturers written instructions. Consult the individual manufacturer for specific recommendations.
1.5 Thick poured gypsum concrete underlayments are not suitable for use on concrete slabs on ground due to potential moisture problems arising from moisture intrusion, unless an adequate vapor retarder or vapor barrier is present directly beneath the concrete subfloor.
1.6 The values stated in inch-pound units are to be regarded as standard. The values stated in parentheses are approximate mathematical conversions to SI units, which are provided for information only.
This practice may involve hazardous materials, operations, and equipment. 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:F2419–05
Standard Practice for
Installation of Thick Poured Gypsum Concrete
Underlayments and Preparation of the Surface to Receive
Resilient Flooring
This standard is issued under the fixed designation F2419; 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
1.1 This practice covers the installation and preparation of 2.1 ASTM Standards:
the thick poured gypsum concrete underlayments over wood C472 Test Methods for Physical Testing of Gypsum, Gyp-
structural panel subfloors in commercial structures or over sum Plasters and Gypsum Concrete
concrete floors in commercial structures and the preparation of D4263 Test Method for Indicating Moisture in Concrete by
the thick poured gypsum concrete underlayment surface prior the Plastic Sheet Method
to the installation of resilient flooring in commercial buildings. F141 Terminology Relating to Resilient Floor Coverings
1.2 This practice covers the factors that are required to be F1482 Practice for Installation and Preparation of Panel
controlled while installing thick poured gypsum concrete Type Underlayments to Receive Resilient Flooring
underlayment as a base for resilient flooring.
3. Terminology
1.3 This practice does not cover the structural adequacy of
the wood structural panel subfloor or concrete subfloor. The 3.1 Definitions—Definitions used in this practice shall be in
accordance with Terminology F141.
structural integrity of assemblies is governed by local building
codes. 3.2 Definitions of Terms Specific to This Standard:
3.2.1 fully adhered flooring, n—resilient flooring which has
1.4 Thispracticedoesnotsupersedeinanymannerthethick
poured gypsum concrete underlayment manufacturers, adhe- adhesive under the entire product, bonding it to the underlay-
ment surface. F1482
sive manufacturer’s or resilient flooring manufacturer’s written
instructions. Consult the individual manufacturer for specific 3.2.2 non-fully adhered flooring, n—resilient flooring that
recommendations. may be loose laid, in which no adhesive is utilized, or partially
bonded to the surface of the underlayment, typically at seams
1.5 Thick poured gypsum concrete underlayments are not
suitable for use on concrete slabs on ground due to potential and the surrounding perimeter of the product. F1482
3.2.3 subfloor, n—that wood or concrete structural layer
moisture problems arising from moisture intrusion, unless an
adequate vapor retarder or vapor barrier is present directly intendedtoprovidesupportfordesignloadswhichmayreceive
resilient floor coverings directly if the surface is appropriate or
beneath the concrete subfloor.
1.6 The values stated in inch-pound units are to be regarded indirectly via an underlayment if its surface is not suitable or if
underlayment is required by appropriate code authorities.
as standard. The values stated in parentheses are approximate
mathematical conversions to SI units, which are provided for 3.2.4 gypsum concrete underlayment, n—that layer of ma-
terial, with binder content composed primarily of gypsum
information only.
1.7 This practice may involve hazardous materials, opera- cement and Portland cement that is mixed with sand and water,
then pumped and poured in a liquid state to be installed on or
tions, and equipment. This standard does not purport to
address all of the safety concerns, if any, associated with its over a subfloor to provide a monolithic surface suitable to
receive resilient floor coverings.
use. It is the responsibility of the user of this standard to
establish appropriate safety and health practices and deter- 3.2.5 thick poured gypsum concrete underlayment,
n—products which are installed in a liquid state over a
mine the applicability of regulatory limitations prior to use.
structurallysoundconcreteorprecastsubfloorataminimumof
This practice is under the jurisdiction of ASTM Committee F06 on Resilient
Floor Coverings and is the direct responsibility of Subcommittee F06.40 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Practices. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Feb. 1, 2005. Published February 2005. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
F2419-05. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F2419–05
⁄2 in. (13 mm) or a structurally sound wood subfloor at a mat shall be 1 in. (25 mm). Subfloor must support design loads
minimum of ⁄4 in. (19 mm) which when dry form an integral with maximum L360 deflection.
part of the floor ceiling assembly for fire resistance and sound
7.2 Woodandconcretesubfloorsshallbestructurallysound,
ratings, satisfy building codes for thick poured gypsum con-
clean and dry so as to support both the design live and dead
crete underlayments, and provide a suitable floor surface for
loads in compliance with the local building code and the
the installation of resilient floor coverings.
resilient flooring manufacturers installation requirements.
3.2.6 sound mat, n—a membrane installed between a struc-
7.3 The finished surfaces of the wood or concrete subfloor
turally sound subfloor and a thick poured gypsum concrete
shall be properly prepared, clean, dry, smooth, and free of
underlayment to increase sound reduction in the floor ceiling
construction wastes such as acoustic and wall texture, over-
assembly.
spray, dirt, solvents, oil, grease, residual construction adhe-
sives, adhesive removers, and other foreign materials. Con-
4. Significance and Use
crete subfloors shall be fully cured and 28 days or older.
4.1 This practice provides minimum recommendations for
7.4 Before, during and after installation of thick poured
the installation of thick poured gypsum concrete floor under-
gypsum concrete underlayment, the general contractor shall be
layments suitable to receive resilient floor coverings. This
responsible for ensuring that the building shall be ventilated
practice establishes the proper preparation, installation and
and heated to a minimum of 50°F (10°C) until subfloor and
quality control for thick poured gypsum concrete floor under-
ambient temperatures have stabilized. Temperature during and
layments.
after installation shall be maintained until material has com-
4.2 Actual requirements for thick poured gypsum concrete
pletely cured. The general contractor shall provide heat and
underlaymentsaregenerallyincludedaspartofprojectplansor
ventilation as necessary to dry the thick poured gypsum
specifications and may vary from the recommendations set
concrete underlayment.
forth in this practice. Project plans or specifications, or both,
7.5 Installation of thick poured gypsum concrete underlay-
shall supersede the recommendations set forth in this practice.
ment shall not begin until the building is enclosed, including
roof, windows, doors and other openings. The general contrac-
5. Product Requirements
tor shall be responsible to provide continuous ventilation until
5.1 For the purposes of this practice, thick poured gypsum
the underlayment is dry. Thick poured gypsum concrete
concrete underlayment shall be compounds consisting prima-
underlayment can be installed before or after the installation of
rily of a mixture of gypsum cement, Portland cement and sand.
drywall d
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