The scope of this method provides for the testing of rigid cellular plastics that have thicknesses from 10 mm or over and which may, as an integral part of the material, contain natural skins or adhered facings of some different material.

Three different sets of temperature and humidity conditions are provided as follows:

a) 38°C and a relative-humidity gradient across the specimen of 0 % to 88 %;

b) 23°C and a relative-humidity gradient across the specimen of 0 % to 85 %;

c) 23°C and a relative-humidity gradient across the specimen of 0 % to 50 %.

The results obtained by this method are suitable for design purposes, production control, and for inclusion in product specifications.

The method is suitable for materials which have water vapour transmission rates in the range 3 µg/(m2. s) to 200 µg/(m2. s).

NOTE The International Standard corresponding to this Standard and the symbol of degree of correspondence is as follows.

ISO 1663: 2007 Rigid cellular plastics-Determination of water vapour transmission properties (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.

This Standard is not applicable to polyurethane foams foamed in place, foams for use in heat-welded systems unless for load-bearing purposes, or foams for carpet backing and underlay or for cushioning for packaging.

Foams are classified into types, classes according to performance during a constant- load pounding test, and grades according to hardness.

NOTE: The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 5999 : 2007 Flexible cellular polymeric materials – Polyurethane foam for load-bearing applications excluding carpet underlay – Specification (MOD)

The symbols which denote the degree of correspondence in the contents in the corresponding International Standard and JIS are IDT (identical), MOD (modified) and NEQ (not equivalent) according to ISO/lEC Guide 21-1.

Warning Persons using this Standard should be familiar with normal laboratory practice.

This Standard does not purport to address all of the safety problems, if any, associated with its use.

It is the responsibility of the user to establish appropriate safety and health practices.

These guidelines are not intended to prove the suitability of any particular product for any given application.

The standard applies only to prefabricated thermal-insulation products, i.e. manufactured mats and boards including any facings or coverings which may be present, although the basic characteristics may also be applied to other insulation products, e.g. in situ in systems or components, where appropriate.

The standard covers only thermal-insulation products for use in buildings within normal climatic conditions. It does not cover insulation products for building services, e.g. plumbing and heating, nor insulation products for industrial use.

Acoustic properties are not included in the properties given in the standard, although these may be additionally required for some fields of application.