This part of ISO 12576 establishes three systems for the conformity control of thermal insulation products that are manufactured on site from components produced in a factory, and provides the minimum requirements for each system. Examples of these types of products are loose fill and spray-applied insulations.

The purpose of this part of ISO 12576 is to provide uniform methods to determine whether the production of a thermal insulation product is acceptable as conforming to the relevant specification requirements once it is installed on site.