ISO 4760:2022

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 2022
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ii
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
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
iv
Foreword
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v
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
...