11.1.2 Certification
MMC systems shall be adequately certified as being suitable for their intended use.
MMC systems should have certification confirming satisfactory assessment, undertaken by an independent technical approvals authority, or acceptance in writing by NHBC Accepts.
The scope of certification by an independent technical approvals authority should include:
- inspection and surveillance of factory production
- strength and stability (including temporary loads)
- fire resistance including details of critical junctions between elements
- reaction to fire classification
- thermal performance
- acoustic performance
- system junctions and joints
- maintenance and repairability
- condensation risk
- resistance to weathering in use, including temporary resistance during transport and during construction
- regulatory compliance
- design considerations
- installation guidance and acceptable superstructure tolerances
- durability
- approval of installers.
Certification and system documentation should be:
- made available to NHBC before work begins on site, and
- used as reference to ensure compliance.
Use of the system should be within the scope of the certification. Where relevant, certification should make reference to test evidence or documentation used to support or justify any declarations or conclusions made.
Standard components assessed as part of the system certification and performing critical functions should not be substituted or replaced unless agreed otherwise by NHBC.
Last updated: 2nd January 2025