ASTM F2678-16(2021)
(Practice)Standard Practice for Preparing Panel Underlayments, Thick Poured Gypsum Concrete Underlayments, Thick Poured Lightweight Cellular Concrete Underlayments, and Concrete Subfloors with Underlayment Patching Compounds to Receive Resilient Flooring
Standard Practice for Preparing Panel Underlayments, Thick Poured Gypsum Concrete Underlayments, Thick Poured Lightweight Cellular Concrete Underlayments, and Concrete Subfloors with Underlayment Patching Compounds to Receive Resilient Flooring
SIGNIFICANCE AND USE
4.1 This practice provides minimum recommendations for preparing and smoothing panel underlayments, thick poured gypsum concrete underlayments, thick poured lightweight cellular concrete underlayments and concrete subfloors with patching compounds. Actual requirements for materials to be used, mixtures, and other details are generally included as part of the project plans or specification details and may vary from the minimum recommendations set forth in this practice.
SCOPE
1.1 This practice includes recommendations for preparing and smoothing panel underlayments, gypsum concrete and concrete subfloors with patching compounds upon which resilient flooring may be installed.
1.2 This practice does not cover the adequacy of the subfloor assembly to perform its structural requirements, which is governed by local building codes.
1.3 This practice does not supersede in any manner the resilient flooring, underlayment or adhesive manufacturer’s written instructions. Consult the individual resilient flooring, underlayment or adhesive manufacturer for specific recommendations.
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 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.
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
- 30-Sep-2021
- Technical Committee
- F06 - Resilient Floor Coverings
- Drafting Committee
- F06.40 - Practices
Relations
- Effective Date
- 15-Dec-2023
- Effective Date
- 01-Aug-2023
- Effective Date
- 01-Apr-2020
- Effective Date
- 15-Jan-2020
- Effective Date
- 01-Feb-2019
- Effective Date
- 01-Feb-2019
- Effective Date
- 01-Sep-2017
- Effective Date
- 01-Apr-2014
- Effective Date
- 01-May-2013
- Effective Date
- 15-Dec-2012
- Effective Date
- 01-Mar-2012
- Effective Date
- 01-Dec-2011
- Effective Date
- 01-Oct-2011
- Effective Date
- 15-Jun-2011
- Effective Date
- 15-May-2011
Overview
ASTM F2678-16(2021) is the internationally recognized standard practice published by ASTM International for preparing panel underlayments, thick poured gypsum concrete underlayments, thick poured lightweight cellular concrete underlayments, and conventional concrete subfloors with underlayment patching compounds to receive resilient flooring. The standard sets forth the minimum recommendations for surface preparation, smoothing, and the use of patching compounds prior to installing resilient flooring products. This practice is widely used in commercial and residential construction to ensure proper installation conditions for a variety of resilient floor coverings, helping achieve optimal performance, durability, and safety.
Key Topics
- Surface Preparation: Guidance on cleaning, smoothing, and preparing panel underlayments, gypsum concrete underlayments, lightweight cellular concrete underlayments, and concrete subfloors before resilient flooring installation.
- Use of Patching Compounds: Requirements for the selection, application, mixing, and curing of patching compounds to achieve a level, mildew-resistant, and alkali-resistant surface.
- Environmental Conditions: Recommendations for appropriate temperature ranges and moisture control during patching and installation, as well as proper material storage and protection on site.
- Bonding and Testing: Advice on evaluating subfloor porosity, performing bond tests, and ensuring adequate adhesion between patching compounds and subfloor types.
- Panel Underlayment Requirements: Detailed recommendations regarding the use and installation of panel underlayments, including minimum thickness and offset of joints.
- Jobsite Safety and Environmental Practices: Emphasis on health, safety, and environmental responsibilities during surface preparation, including handling materials that may contain asbestos or lead, and using appropriate removal methods for old flooring and adhesives.
- Reference to Manufacturer Instructions: Clarification that this standard is supplementary to, and does not supersede, the specific requirements of resilient flooring, underlayment, or adhesive manufacturers.
Applications
- Commercial and Residential Flooring Projects: Essential for architects, flooring installers, and contractors preparing subfloors in diverse environments such as offices, schools, hospitals, and multi-family residences.
- Renovation and New Construction: Applicable during the installation of resilient flooring systems over new or existing subfloors made from wood panels, concrete, gypsum concrete, or lightweight cellular concrete.
- Quality Control and Compliance: Enables project teams to meet quality benchmarks, minimize installation failures, and ensure compatibility with resilient flooring systems by following industry-accepted best practices.
- Problem Prevention: Helps prevent common flooring failures such as adhesive loss, flooring movement, and mold growth by specifying strict preparation and patching conditions.
- General Building Code Compliance: Supports adherence to local building code requirements by referencing established standards and practices for subfloor and underlayment preparation.
Related Standards
- ASTM F710: Practice for Preparing Concrete Floors to Receive Resilient Flooring
- ASTM F1482: Practice for Installation and Preparation of Panel Type Underlayments to Receive Resilient Flooring
- ASTM F2419: Practice for Installation of Thick Poured Gypsum Concrete Underlayments and Preparation of the Surface to Receive Resilient Flooring
- ASTM F2471: Practice for Installation of Thick Poured Lightweight Cellular Concrete Underlayments and Preparation of the Surface to Receive Resilient Flooring
- ASTM C109/C109M: Test Method for Compressive Strength of Hydraulic Cement Mortars
- ASTM C472: Test Methods for Physical Testing of Gypsum, Gypsum Plasters, and Gypsum Concrete
- ASTM F141: Terminology Relating to Resilient Floor Coverings
By adhering to ASTM F2678-16(2021), stakeholders in the flooring industry can achieve greater consistency, safety, and long-term performance in resilient flooring installations over a wide range of subfloor types and conditions.
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ASTM F2678-16(2021) - Standard Practice for Preparing Panel Underlayments, Thick Poured Gypsum Concrete Underlayments, Thick Poured Lightweight Cellular Concrete Underlayments, and Concrete Subfloors with Underlayment Patching Compounds to Receive Resilient Flooring
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Frequently Asked Questions
ASTM F2678-16(2021) is a standard published by ASTM International. Its full title is "Standard Practice for Preparing Panel Underlayments, Thick Poured Gypsum Concrete Underlayments, Thick Poured Lightweight Cellular Concrete Underlayments, and Concrete Subfloors with Underlayment Patching Compounds to Receive Resilient Flooring". This standard covers: SIGNIFICANCE AND USE 4.1 This practice provides minimum recommendations for preparing and smoothing panel underlayments, thick poured gypsum concrete underlayments, thick poured lightweight cellular concrete underlayments and concrete subfloors with patching compounds. Actual requirements for materials to be used, mixtures, and other details are generally included as part of the project plans or specification details and may vary from the minimum recommendations set forth in this practice. SCOPE 1.1 This practice includes recommendations for preparing and smoothing panel underlayments, gypsum concrete and concrete subfloors with patching compounds upon which resilient flooring may be installed. 1.2 This practice does not cover the adequacy of the subfloor assembly to perform its structural requirements, which is governed by local building codes. 1.3 This practice does not supersede in any manner the resilient flooring, underlayment or adhesive manufacturer’s written instructions. Consult the individual resilient flooring, underlayment or adhesive manufacturer for specific recommendations. 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 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. 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.
SIGNIFICANCE AND USE 4.1 This practice provides minimum recommendations for preparing and smoothing panel underlayments, thick poured gypsum concrete underlayments, thick poured lightweight cellular concrete underlayments and concrete subfloors with patching compounds. Actual requirements for materials to be used, mixtures, and other details are generally included as part of the project plans or specification details and may vary from the minimum recommendations set forth in this practice. SCOPE 1.1 This practice includes recommendations for preparing and smoothing panel underlayments, gypsum concrete and concrete subfloors with patching compounds upon which resilient flooring may be installed. 1.2 This practice does not cover the adequacy of the subfloor assembly to perform its structural requirements, which is governed by local building codes. 1.3 This practice does not supersede in any manner the resilient flooring, underlayment or adhesive manufacturer’s written instructions. Consult the individual resilient flooring, underlayment or adhesive manufacturer for specific recommendations. 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 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. 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.
ASTM F2678-16(2021) is classified under the following ICS (International Classification for Standards) categories: 91.180 - Interior finishing. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM F2678-16(2021) has the following relationships with other standards: It is inter standard links to ASTM C109/C109M-23, ASTM F141-23, ASTM C472-20, ASTM F141-12(2020), ASTM F710-19, ASTM F2471-19, ASTM F710-17, ASTM C472-99(2014), ASTM F2471-13, ASTM C109/C109M-12, ASTM F141-12, ASTM F141-11, ASTM C109/C109M-11a, ASTM F2419-11, ASTM F710-11. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM F2678-16(2021) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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: F2678 −16 (Reapproved 2021)
Standard Practice for
Preparing Panel Underlayments, Thick Poured Gypsum
Concrete Underlayments, Thick Poured Lightweight Cellular
Concrete Underlayments, and Concrete Subfloors with
Underlayment Patching Compounds to Receive Resilient
Flooring
This standard is issued under the fixed designation F2678; 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
2.1 ASTM Standards:
1.1 This practice includes recommendations for preparing
C109/C109M Test Method for Compressive Strength of
and smoothing panel underlayments, gypsum concrete and
Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube
concrete subfloors with patching compounds upon which
Specimens)
resilient flooring may be installed.
C472 Test Methods for Physical Testing of Gypsum, Gyp-
1.2 This practice does not cover the adequacy of the
sum Plasters, and Gypsum Concrete
subfloorassemblytoperformitsstructuralrequirements,which
F141 Terminology Relating to Resilient Floor Coverings
is governed by local building codes.
F710 Practice for Preparing Concrete Floors to Receive
Resilient Flooring
1.3 This practice does not supersede in any manner the
F1482 Practice for Installation and Preparation of Panel
resilient flooring, underlayment or adhesive manufacturer’s
Type Underlayments to Receive Resilient Flooring
written instructions. Consult the individual resilient flooring,
F2419 Practice for Installation of Thick Poured Gypsum
underlayment or adhesive manufacturer for specific recom-
Concrete Underlayments and Preparation of the Surface to
mendations.
Receive Resilient Flooring
F2471 Practice for Installation of Thick Poured Lightweight
1.4 The values stated in inch-pound units are to be regarded
Cellular Concrete Underlayments and Preparation of the
as standard. The values given in parentheses are mathematical
Surface to Receive Resilient Flooring
conversions to SI units that are provided for information only
and are not considered standard.
3. Terminology
1.5 This standard does not purport to address all of the
3.1 Definitions used in this practice shall be in accordance
safety concerns, if any, associated with its use. It is the
with Terminology F141.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4. Significance and Use
mine the applicability of regulatory limitations prior to use.
4.1 This practice provides minimum recommendations for
1.6 This international standard was developed in accor-
preparing and smoothing panel underlayments, thick poured
dance with internationally recognized principles on standard-
gypsum concrete underlayments, thick poured lightweight
ization established in the Decision on Principles for the
cellular concrete underlayments and concrete subfloors with
Development of International Standards, Guides and Recom-
patching compounds. Actual requirements for materials to be
mendations issued by the World Trade Organization Technical
used, mixtures, and other details are generally included as part
Barriers to Trade (TBT) Committee.
of the project plans or specification details and may vary from
the minimum recommendations set forth in this practice.
This practice is under the jurisdiction of ASTM Committee F06 on Resilient
Floor Coverings and is the direct responsibility of Subcommittee F06.40 on
Practices. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2021. Published October 2021. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2010. Last previous edition approved in 2016 as F2678-16. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F2678-16R21. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2678 − 16 (2021)
5. Product Requirements 8.1.4 Structural lightweight concretes having a minimum
3 3
density of 115 lb/ft (1842 kg/m ) and a minimum compressive
5.1 The patching compound shall be able to be applied from
strength of 3000 psi can be suitable substrates to receive
featheredge up to the manufacturer’s specified thickness over
patching compounds.
large areas.
8.1.5 The temperature of a heated subfloor must not exceed
5.2 The patching compound may require the addition of an
85 °F (30 °C).
additive other than water.
8.1.6 All moving joints such as expansion joints, isolation
5.3 The patching compound shall be able to be covered by joints and any cracks exhibiting movement shall not be filled
with patching compound or covered with resilient flooring.
resilient floorings as soon as the patching hardens and dries
sufficiently. Consult the resilient flooring manufacturer regarding the use of
an expansion joint covering system.
5.4 The dried patching compound shall be moisture-free,
8.2 Panel Underlayment:
mildew-resistant and alkali-resistant.
8.2.1 All panel underlayment used shall be recommended
5.5 For commercial installations, the patching compound
by either the panel underlayment manufacturer or the resilient
shall develop a minimum of 3000 psi compressive strength
flooring manufacturer.
after 28 days when tested in accordance with Test Method
8.2.2 All panel underlayment shall be installed in accor-
C109/C109M (air-cured only) or with Test Methods C472.
dance with the Standard Practice F1482.
8.2.3 All wood structural floor assemblies shall be double-
6. Material Acceptance
layered (a combination of the wood subfloor and panel
6.1 All patching compounds shall be delivered in their 5
underlayment). The subfloor panel shall be ⁄8 in. (16 mm)
original, factory packaging.
thick minimum wood structural panels (usually Exterior Grade
Plywood) over joist 16 in. (41 cm), typically on center. Joist
7. Material Storage, Conditioning and Protection
center spacing shall comply with local building codes. The
panel underlayment shall be a minimum ⁄4 in. (6.4 mm) thick,
7.1 All patching compounds shall be kept dry in a tempera-
and sufficiently smooth to receive resilient flooring (thicker
ture controlled environment on site and protected from the
boards may be required for commercial applications). The
weather at least 48 h prior to use. The temperature shall not be
adjacent edges of the underlayment panels shall not be more
below 65°F (18°C) or above 100°F (38°C). Refer to the
than ⁄32 in. (1.6 mm) above or below each other. End joints of
patching compound manufacturer’s recommendation for more
panel underlayment shall be offset from subfloor panel joints
specific instruction.
by at least one joist spacing. Panel underlayment edge joints
7.2 Allpatchingcompoundsshallbekeptoffthegroundand
shall be offset from subfloor panel edge joints by at least 2 in.
away from damp and cold surfaces.
8.3 Concrete Subfloors:
7.3 Protect the applied patching compound from excessive
8.3.1 All concrete subfloors shall meet the requirements
heat and drafty conditions while curing.
outlined in Practice F710.
7.4 Protect the applied patching compound and the entire
8.3.2 All concrete subfloors shall have a minimum density
3 3
subfloor from traffic, dirt or dust or other contaminates such as
of 115 lb/ft (1842 kg/m ).
sweeping compounds until final installation of the resilient
8.3.3 Due to the varying porosity of concrete subfloors, we
floor covering. recommend that a bond test be performed to ensure adequate
bond. If an adequate bond is not achieved, abrasively prepare
8. General Guidelines the concrete subfloor surface according to the patching com-
pound manufacturer’s recommendation. Methods such as
8.1 General Specifications:
grinding or shot blasting are appropriate.
8.1.1 The patching compound shall not be applied t
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