ISO 23999-2025 PDF

Full title and description

ISO 23999:2025 — Resilient floor coverings — Determination of dimensional stability and curling (vertical deformation) after exposure to heat. This International Standard specifies test methods to assess how resilient floor coverings (sheets, tiles, planks, panels or rolls) change dimensionally and develop vertical deformation when exposed to heat and/or following reconditioning.

Abstract

This standard defines procedures to prepare specimens, expose resilient floor coverings to defined heat conditions and reconditioning, measure dimensional change and vertical curling, and report results so manufacturers, laboratories and specifiers can evaluate thermal stability. It is a consolidation and update of earlier editions to align test details and reporting.

General information

• Status: Published (International Standard).
• Publication date: 26 November 2025 (notation: 2025-11; published stage entry shows 2025-11-26).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 97.150 (Floor coverings).
• Edition / version: Edition 4 (ISO 23999:2025).
• Number of pages: 16 (official ISO publication listing).

Scope

The standard specifies laboratory methods for determining dimensional stability (linear and area change) and vertical deformation (curling) of resilient floor coverings in their common product forms after exposure to specified heat conditions and after any required reconditioning. It is intended to provide repeatable test procedures and reporting rules to assess behaviour under elevated temperature and to support product specification, quality control and compliance activities.

Key topics and requirements

• Definitions and selection of representative specimens (sheets, tiles, planks, panels, rolls).
• Specimen preparation, marking and pre-conditioning prior to test.
• Controlled heating exposure regimes and reconditioning procedures to simulate service or storage conditions.
• Measurement methods for linear/area dimensional change and for vertical deformation (curling), including instruments and measurement points.
• Calculation and expression of results (percentage dimensional change, maximum vertical deformation) and criteria for reporting.
• Requirements for test repeatability, environmental controls, and uncertainty considerations for laboratory practice.
• Test report content: specimen ID, test conditions, measured values, any deviations from test method and conclusion.

Typical use and users

Used by manufacturers of resilient floor coverings, independent testing laboratories, certification bodies, product designers, architects, specification writers and compliance officers to verify thermal dimensional stability and curling performance for quality control, product development, third‑party certification and building specification. The standard helps compare products and support claims related to stability under heat exposure.

Related standards

Previous editions and related deliverables include ISO 23999:2018 (withdrawn) and intermediate revisions; the 2018 edition was withdrawn when the 2025 edition was published. Related ISO/TC 219 work and other floor‑covering test standards (ICS 97.150 family) may be relevant when assessing broader performance (durability, wear, dimensional tolerances).

Keywords

resilient floor coverings; dimensional stability; curling; vertical deformation; heat exposure; test method; specimen preparation; ISO 23999; floor tiles; floor planks; quality control.

FAQ

Q: What is this standard?

A: ISO 23999:2025 is an International Standard that specifies laboratory methods to determine dimensional stability and vertical curling of resilient floor coverings after exposure to heat and any required reconditioning.

Q: What does it cover?

A: It covers specimen preparation, controlled heat exposure and reconditioning, measurement of linear/area dimensional change and vertical deformation (curling), calculation of results and required test reporting.

Q: Who typically uses it?

A: Manufacturers, test laboratories, certification bodies, specifiers, architects and compliance staff use this standard for product development, quality control, third‑party testing and to support product specifications.

Q: Is it current or superseded?

A: ISO 23999:2025 is the current published edition. It replaces earlier editions (including the 2018 edition which was withdrawn) and its official publication date is 26 November 2025.

Q: Is it part of a series?

A: It belongs to the ISO family of standards for floor coverings and falls under ICS category 97.150; related test methods and standards developed under ISO/TC 219 address other performance attributes of floor coverings.

Q: What are the key keywords?

A: Resilient floor coverings, dimensional stability, curling, vertical deformation, heat exposure, test method, specimen, ISO 23999.