PPS 3338

Project Plan 2026

Rigid cellular plastics — Thermal insulation products for buildings — Specifications

Adopted by the Council as a standard on 10/08/2026
Sector: Chemicals and Petroleum
Project Method: Adoption with modification
Project Type: New
International Classification for Standards (ICS)
Code Classification
83.100 Cellular materials
91.100.60 Thermal and sound insulating materials
Adopted Standard
Standards / Amendment / Corrigendum
1 ISO 4898:2025
Scope

This document specifies requirements and methods of testing for three categories of rigid cellular plastics thermal-insulation products for buildings. It covers rigid cellular plastics in the form of flat or profiled boards, with or without natural skins. They can also be faced or laminated with foil, plastic or metal films or sheets, mineral coatings, paper, cardboard, or other materials.
This document is not applicable to materials used for the thermal insulation of pipes and vessels, for impact sound absorption or for acoustical insulation.
This document covers the following cellular materials used in the thermal insulation of buildings:
— PF
based on phenolic polymer;
— EPS
based on expanded polystyrene;
— XPS
based on extruded polystyrene;
— PUR
based on polyurethane.
The limiting quality values in this document are for use only in the specification of materials between purchaser and supplier.