EN 662:1994

Overview

EN 662:1994 is a CEN European Standard for resilient floor coverings that specifies a laboratory method to determine the vertical deformation (curling) of a floor covering when in contact with a wet surface. The standard applies to non-textile resilient floor coverings and is intended to assess dimensional behaviour on exposure to moisture. The Slovene adoption is published as SIST EN 662:1999 and the document falls under ICS 97.150 (Non‑textile floor coverings).

Key Topics

• Scope and applicability: Defines which types of resilient, non-textile floor coverings the method covers.
• Test principle: Exposure of a specimen to a wet surface and subsequent measurement of vertical deformation (commonly referred to as curling).
• Specimen preparation and conditioning: Requirements for sample dimensions, pre-conditioning and handling before exposure (ensures repeatable results).
• Exposure procedure: The controlled procedure for placing a specimen in contact with moisture (the standard describes the wet-contact method rather than immersion).
• Measurement and reporting: How vertical deformation (curling) is recorded and reported, including units and required test observations.
• Repeatability and documentation: Instructions for documenting test conditions, results and any deviations to support comparison between tests and laboratories.

Applications

EN 662:1994 is used where moisture-induced deformation is a concern during manufacture, installation or in-service performance:

• Manufacturers: For product development, quality control and material selection to reduce curling risk.
• Laboratories: Routine testing to verify conformity and to produce repeatable performance data for technical files.
• Specifiers and architects: To evaluate suitability of a resilient floor covering for moisture-prone environments (wet rooms, kitchens, entrances).
• Installers and building managers: To understand handling and installation limits where wet substrates or temporary wetting may occur.
• Regulatory and procurement teams: As part of tender specifications and compliance documentation for building materials.

Related Standards

• Other European standards for resilient floor coverings covering topics such as wear resistance, dimensional stability and reaction to fire (refer to the relevant EN series for non-textile floor coverings).
• National adoption documents (e.g., SIST EN 662:1999) that reproduce EN 662:1994 within local standards committees.

EN 662:1994 provides a focused, repeatable method to quantify curling caused by moisture exposure, helping manufacturers, test labs and specifiers manage product performance and installation risk.