This technical document provides additional guidance relating to how the functional requirements in the Technical Manual may be satisfied where substitute materials are used.
Materials are often substituted during a construction project and this can be due to a variety of reasons, from shortage of materials to value engineering. However, when materials are substituted it is important they still meet the requirements of our Technical Manual.
Substitute materials can be an issue as they often
Materials that are substituted must meet the functional requirements of our Technical Manual, in particular, the General Functional Requirements and the ‘Additional Functional Requirements’ in Appendix C, ‘Suitability of Products and Systems’. Appendix C requires that all products must:
When a product is to be substituted, the developer must advise the warranty surveyor as early as possible and be provided with a full third party product conformity approval certificate of the new product to be used so it can be reviewed.
In summary, where materials are substituted it is important they are carefully chosen to ensure they meet the General Functional Requirements and the ‘Additional Functional Requirements’ in Appendix C, ‘Suitability of Products and Systems’ of our Technical Manual. The developer should make the warranty surveyor aware of any material substitutions as early as possible.
Every care was taken to ensure the information in this article was correct at the time of publication. Guidance provided does not replace the reader’s professional judgement and any construction project should comply with the relevant Building Regulations or applicable technical standards. For the most up to date Premier Guarantee technical guidance please refer to your Risk Management Surveyor and the latest version of the Premier Guarantee Technical Manual.