Fire dampers are a critical component of your building's passive fire protection system. Without regular testing to BS 9999, a failed damper can allow fire and smoke to spread through your building's ductwork — with potentially fatal consequences.
Fire dampers are passive fire protection devices installed in ductwork where it passes through fire-rated walls, floors and ceilings. When a fire occurs, they close automatically to prevent the spread of fire and smoke. But only if they work.
Any building where ductwork passes through fire-rated compartment walls or floors. This includes offices, schools, hospitals, care homes, hotels, restaurants, warehouses and apartment blocks.
ALL COMMERCIAL BUILDINGSBS 9999 requires fire dampers to be tested at least annually. In high-risk environments such as healthcare and care homes, more frequent testing may be required — typically every 6 months.
MINIMUM ANNUALLYThe Responsible Person under the Regulatory Reform (Fire Safety) Order 2005 — typically the building owner, employer or facilities manager — has a legal duty to ensure fire dampers are maintained and tested.
LEGAL DUTY OF CAREBS 9999 is the British Standard for fire safety in the design, management and use of buildings. It provides detailed requirements for the maintenance and testing of fire dampers, complemented by BESA DW145 which covers the practical installation and testing methodology.
Each damper must be visually inspected for signs of damage, corrosion, grease contamination, and any obstructions that could prevent correct operation.
Every damper must be physically operated to confirm it closes fully and reopens correctly. This requires access and often involves working at height in ceiling voids.
Failed dampers must be repaired or replaced. We carry out on-the-spot remediation where possible and provide a clear remediation report for any work that requires further action.
A full test report is provided for every damper — pass or fail — with location, test result, any remedial action taken, and photographic evidence. This is your legal proof of compliance.
We identify and log every fire damper on site, including those that may not be on existing records. Each is assigned a reference number.
Each damper is accessed, inspected for damage and contamination, and photographed before testing begins.
Each damper is triggered and tested to confirm it closes fully and re-opens correctly. Results are recorded in real time.
Failed dampers are remediated where possible. A full written test report with all results, photos and remediation actions is issued within 24 hours.
This depends entirely on the number of dampers and their accessibility. A small office building with 10-20 dampers may take half a day. A large commercial building with 100+ dampers could take 2-3 days. We'll provide a time estimate when we survey your site.
Generally no — testing can be carried out while the building is occupied. However, we may need brief access to ceiling voids and plant rooms. We'll coordinate with your facilities team to minimise disruption.
We'll attempt on-the-spot remediation for common failures (e.g. cleaning, lubrication, blade adjustment). For dampers requiring replacement, we'll provide a written quotation and temporary risk management advice.
A full test report listing every damper tested, its location, test result (pass/fail), any remedial action taken, and photographic evidence. This is issued within 24 hours and is your legal compliance record.
Start with a site survey. We'll locate all dampers, assess their condition and produce a full report. Many buildings don't have an accurate damper schedule — we'll create one for you as part of the service.
Don't wait for a fire risk assessment to flag your dampers as overdue. Get compliant now — full BS 9999 testing, documentation issued within 24 hours.
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