Laminate flooring — Topical moisture resistance — Assembled joint

This document specifies a test method to evaluate moisture resistance to surface water exposure of a joined, floating, laminate flooring assembly/element. This document also establishes criteria for rating and assessing performance.

Sol stratifié — Résistance à l'humidité superficielle – joint assemblé

General Information

Status
Published
Publication Date
12-May-2022
Current Stage
4060 - Close of voting
Start Date
31-Jul-2021
Completion Date
30-Jul-2021
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ISO 4760:2022 - Laminate flooring — Topical moisture resistance — Assembled joint Released:5/13/2022
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INTERNATIONAL ISO
STANDARD 4760
First edition
2022-05
Laminate flooring — Topical moisture
resistance — Assembled joint
Sol stratifié — Résistance à l'humidité superficielle – joint assemblé
Reference number
ISO 4760:2022(E)
© ISO 2022
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ISO 4760:2022(E)
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© ISO 2022

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© ISO 2022 – All rights reserved
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ISO 4760:2022(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction .............................................................................................................................................................................................................................. vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 1

4 Materials needed ................................................................................................................................................................................................. 2

4.1 Planks ............................................................................................................................................................................................................. 2

4.2 Plastic ring ........................................................................................................................................... ....................................................... 2

4.3 Beaker............................................................................................................................................................................................................. 2

4.4 Distilled or de-ionized water ..................................................................................................................................................... 2

4.5 Dye colour ................................................................................................................................................................................................... 2

4.6 Sealant ............................................................................................................................................................................................................ 2

4.7 Measuring device ................................................................................................................................................................................. 2

5 Conditioning ............................................................................................................................................................................................................. 3

6 Procedure ....................................................................................................................................................................................................................3

6.1 Assembling the test specimen .................................................................................................................................................. 3

6.1.1 Inspection ................................................................................................................................................................................. 3

6.1.2 Cutting ......................................................................................................................................................................................... 3

6.1.3 Cleaning ...................................................................................................................................................................................... 4

6.1.4 Assembly.................................................................................................................................................................................... 4

6.1.5 Gaps ................................................................................................................................................................................................ 4

6.1.6 Test positions ................................... ........................................................................................................ .............................. 5

6.1.7 Sealant ......................................................................................................................................................................................... 6

6.1.8 Ring placement ................................... ........................................................................................................ .......................... 6

6.1.9 Weights ....................................................................................................................................................................................... 7

6.1.10 Zeroing gauge ........................................................................................................................................................................ 8

6.1.11 Initial height measurement....................................................................................................................................... 8

6.1.12 Water ............................................................................................................................................................................................. 9

6.1.13 Wet swell exposure ....................................................................................................................................................... 10

6.2 Qualitative rating for wet swell ............................................................................................................................................ 10

6.3 Quantitative rating for wet swell ........................................................................................................................................ 10

6.4 Qualitative rating for recovery swell .............................................................................................................................. 10

6.5 Quantitative rating for recovery swell ........................................................................................................................... 10

7 Rating ............................................................................................................................................................................................................................10

7.1 Qualitative rating .............................................................................................................................................................................. 10

7.2 Quantitative wet swell ..................................................................................................................................................................12

7.3 Qualitative rating and quantitative recovery swell ...........................................................................................12

8 Calculations ............................................................................................................................................................................................................12

8.1 Surface swell calculation ............................................................................................................................................................12

8.1.1 General .....................................................................................................................................................................................12

8.1.2 Wet swell sample average .......................................................................................................................................12

8.1.3 Wet swell final average ..............................................................................................................................................12

8.1.4 Qualitative wet swell rating final average ................................... .............................................................12

8.2 Recovery swell measurements ............................................................................................................................................. 13

8.2.1 General .....................................................................................................................................................................................13

8.2.2 Recovery swell calculation ..................................................................................................................................... 13

8.2.3 Recovery swell sample average ......................................................................................................................... 13

8.2.4 Recovery swell final average ................................................................................................................................ 13

8.2.5 Qualitative recovery swell rating final average ..................................................................................13

9 Statistics – Precision and bias – Interlaboratory studies ......................................................................................13

iii
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ISO 4760:2022(E)

10 Report ...........................................................................................................................................................................................................................14

Annex A (informative) Seam/joint swell – Table of individual results ........................................................................15

Annex B (informative) Example of photos to match with subjective ratings ........................................................16

Annex C (informative) Topical moisture resistance worksheet – Surface swell evaluation

worksheet .................................................................................................................................................................................................................19

Annex D (informative) Water tightness of the joints ......................................................................................................................20

Bibliography .............................................................................................................................................................................................................................21

© ISO 2022 – All rights reserved
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ISO 4760:2022(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to

the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see

www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 219, Floor coverings.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www.iso.org/members.html.
© ISO 2022 – All rights reserved
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ISO 4760:2022(E)
Introduction

The purpose of this document is to evaluate small occasional topical moisture spill resistance properties

of a laminate flooring such as e.g. a glass of water falling and spilling then cleaned immediately after. A

laminate floor plank/tile is cut into pieces then connected using the profiled locking edges and fastened

into an assembled floating “T joint” configuration. The assembled specimen or elements are exposed to

surface water, evaluated for surface swell effect, after removing the water as well as after a recovery

time period. Evaluation criteria is qualitative, as well as quantitative. The method can also be utilized

to evaluate joint leakage, when exposed to surface water.

This document describes how to evaluate and rate the test specimens. It also provides an annex work

sheet to log and help assess specimen rating and measurement scores.

Some of the content of this document was already published in NALFA Surface Water Test_08-01-

[1]
2019 .
© ISO 2022 – All rights reserved
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INTERNATIONAL STANDARD ISO 4760:2022(E)
Laminate flooring — Topical moisture resistance —
Assembled joint
1 Scope

This document specifies a test method to evaluate moisture resistance to surface water exposure of a

joined, floating, laminate flooring assembly/element. This document also establishes criteria for rating

and assessing performance.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
surface swell

evaluation of visible and measurable raised edges of an assembled Laminate flooring panel/element

joint when exposed to water on the surface
3.2
assembled flooring joint

portions of a Laminate floor plank/tiles held together by their profiled edges that lock together

3.3
qualitative rating

visual and tactile assessment of the assembled flooring joints after exposure to the surface water swell

test
3.4
quantitative rating

measures assessment of the thickness swelling of the assembled flooring joints after the surface water

swell test
3.5
wet swell

quantitative rating of the specimen joint for surface water swell test, measured immediately after 24 h

of exposure and removal of the surface water
3.6
recovery swell

quantitative rating of the specimen flooring joint for surface water swell test, measured after 24 h

exposure, followed by 24 h recovery (re-drying)
© ISO 2022 – All rights reserved
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ISO 4760:2022(E)
4 Materials needed
4.1 Planks

Three planks with undamaged profiled edges. The test is to be run in triplicate. Each test requires one

plank.
4.2 Plastic ring

The plastic ring shall be PVC Pipe, or equivalent having (100 ± 5) mm (4 inch) inner diameter, minimum

25,4 mm (1 inch) tall.
4.3 Beaker

Beaker capable of measuring (100 ± 5) ml (3,4 fl. oz.) of water, should give approximately 9 mm (0,375

inch) deep water height in the plastic ring.
4.4 Distilled or de-ionized water
Distilled or de-ionized water, room temperature; (23 ± 3) °C [(73 ± 5) °F].
4.5 Dye colour
The dye colours shall be red or blue.
4.6 Sealant

Vaseline, silicone caulk or plumbers’ putty shall be used to seal the ring to the laminate plank.

4.7 Measuring device

The measuring device shall consist of a three footed flat support frame with dial indicator comparator

that can measure changes in surface height at a specified position (see Figure 1). A different device may

be used on condition that equivalence to the three footed device is proven.

The unit shall be equipped with a micrometer gauge capable of measuring up to nominal 25 mm (1

inch) graduated to 0,02 mm (0,001 inches). The foot/anvil of the indicator shall have a diameter of

(10 ± 1) mm [(0,394 ± 0,039) inches] with an exerted force of 1 N (0,22 lb-force).

Other suitable devices may be utilized, provided they offer at least equivalent measurement capability.

The same calibrated measurement gauge shall be used for before and after testing measurements.

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ISO 4760:2022(E)
Dimensions in millimetres
Key
A micrometer with nominal 10 mm feet (3/8 inch)
B rigid acrylic plate or equivalent
Figure 1 — Example measuring device
5 Conditioning

Prior to testing for surface swell properties, specimens are to be conditioned per manufacturer’s pre-

installation acclimation recommendations and if acclimation conditions are not specified then acclimate

specimens at (23 ± 3) °C [(73 ± 5) °F] and (50 ± 5) % relative humidity for 24 h.

6 Procedure
6.1 Assembling the test specimen
6.1.1 Inspection
Inspect each test plank and ensure they are free of damage on all 4 sides.
6.1.2 Cutting

Cut a minimum of (152,4 ± 0,5) mm (6 inch) off of both ends (Part A and C) of the laminate plank and

use a minimum (304,8 ± 5) mm (12 inch) from the center (Part B). See Figure 2.

It should be noted that cutting wood products can generate wood dust. Wear suitable dust mask or use

with adequate vacuum exhaust to avoid dust inhalation exposure.
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ISO 4760:2022(E)
Key
a reference for assembling planks D tongue side/end
A left end of the laminate plank, refer to 6.2 E groove side/end
B middle part of the laminate plank, refer to 6.2
C right end of the laminate plank, refer to 6.2
Figure 2 — Plank layout (x 3 test assemblies)
6.1.3 Cleaning

Prior to assembly, make sure to thoroughly clean profiled edges of each specimen part (A, B and C).

Preference is to use an air gun and blow the profiled edges clean, followed by cleaning with a small

brush, suited to the task.
6.1.4 Assembly

Assemble parts A and C according to the manufacturer's recommended installation instructions,

...

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