Astm f 2678 16

Designation: F2678 − 16

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

Flooring1

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

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 recom￾mendations.

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 appro￾priate safety and health practices and determine the applica￾bility of regulatory limitations prior to use.

2. Referenced Documents

2.1 ASTM Standards:2

C109/C109M Test Method for Compressive Strength of

Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube

Specimens)

C472 Test Methods for Physical Testing of Gypsum, Gyp￾sum Plasters and Gypsum Concrete

F141 Terminology Relating to Resilient Floor Coverings

F710 Practice for Preparing Concrete Floors to Receive

Resilient Flooring

F1482 Practice for Installation and Preparation of Panel

Type Underlayments to Receive Resilient Flooring

F2419 Practice for Installation of Thick Poured Gypsum

Concrete Underlayments and Preparation of the Surface to

Receive Resilient Flooring

F2471 Practice for Installation of Thick Poured Lightweight

Cellular Concrete Underlayments and Preparation of the

Surface to Receive Resilient Flooring

3. Terminology

3.1 Definitions used in this practice shall be in accordance

with Terminology F141.

4. 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.

5. Product Requirements

5.1 The patching compound shall be able to be applied from

featheredge up to the manufacturer’s specified thickness over

large areas.

5.2 The patching compound may require the addition of an

additive other than water.

5.3 The patching compound shall be able to be covered by

resilient floorings as soon as the patching hardens and dries

sufficiently.

1 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.

Current edition approved Feb. 15, 2016. Published March 2016. Originally

approved in 2010. Last previous edition approved in 2010 as F2678-10. DOI:

10.1520/F2678–16. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or

contact ASTM Customer Service at [email protected]. For Annual Book of ASTM

Standards volume information, refer to the standard’s Document Summary page on

the ASTM website.

Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States

1