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BS 5839-6 Domestic Fire Alarm Modification Certificate (Grade A)

A Domestic Fire Alarm Modification Certificate records changes to an existing Grade A domestic fire alarm system. It covers the scope of modification, device changes, compatibility confirmation, post-modification tests, and updated system information.

BS 5839-6:2019+A1:2020Valid: One-off (for the specific modification)

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Sample Domestic FA Modification certificate

Sample BS 5839-6 Domestic Fire Alarm Modification Certificate (Grade A) certificate created with CertBox, showing the professional PDF layout with existing system details, modification scope and reason, device additions/removals

Sample Domestic FA Modification with fictional data. All personal details shown are fake.

What it covers

  • Existing system details
  • Modification scope and reason
  • Device additions/removals
  • Compatibility check
  • Post-modification test results
  • Updated system category if changed

Who needs a Domestic FA Modification?

Fire alarm contractors
HMO landlords making alterations
Property developers converting buildings

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Frequently asked questions about Domestic FA Modification

When is a modification certificate needed?
Any time devices are added, removed, or relocated in a Grade A domestic system. This includes room conversions, extensions, or any building work that affects the fire alarm coverage.
Can the system category change after modification?
Yes. If the modification changes coverage (e.g. extending from LD3 to LD2), the new category should be recorded on the modification certificate and all documentation updated accordingly.

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