Fire Damper Surveys

Fire Damper Surveys

A fire damper survey is an important part of achieving compliance to BS 9999 and its purpose is to identify all of the fire dampers in your facility. At NFDI we have three options available to you for a fire damper survey:


We will come to site and engage in an accompanied walk around of the premises so as to estimate the most likely quantity of dampers. We look in all of the places where our experience suggests that dampers would be found, generally where ventilation ductwork passes through fire compartment boundaries. What we cannot do in this informal assessment is to look for dampers that are very often hidden from view. However, this informal “first pass” assessment is a very useful way of gaining an understanding of the presence or absence of fire dampers and order of magnitude for quantities.

This benefit of this assessment is that is quick and cost effective – a free of charge service. The downside is that even though fairly accurate, it is nonetheless approximate and there will always be more or less dampers present than this assessment uncovers and this can upset budget projections.

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Fire Damper Surveys


This inspection is more time consuming and has a cost attached but we will find all dampers within the facility. We conduct a physical inspection of your entire building so as to identify all accessible dampers. It is common that fire dampers are hidden from view and where we suspect that they are, our teams use a borescope (a flexible inspection camera without which we would be unable to complete the task) to confirm or deny their presence.

Many buildings undergo extensions and alterations, and in some instances, these works can obstruct access to fire dampers (in fact, the inability to access dampers through the want of a duct access door, or a builder’s hatch in the ceiling or through services blocking access are the most common reasons for dampers “failing” their test). If we cannot access dampers on a significant scale, we would discuss your options with you. We will not cut into ductwork or building fabric to check for fire dampers as this could compromise fire compartmentation (however, we would drill into ducting to use the borescope and then plug the resultant hole with intumescent tape). Where areas are deemed to be an elevated risk, we would again consult with you to determine the best way forward.

The benefit of this full and complete survey is accuracy. We will have an exceptional understanding of the location of dampers and their quantity which enables you to budget for fire damper testing accurately. The downside is cost – to first inspect and secondarily to test virtually doubles the cost of a joint inspect and test program.

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Many new buildings have drawings showing the air-conditioning ductwork and associated fire dampers. Where they are available and in a suitable format, we will read them to locate and quantify the dampers.

The benefit of this type of survey is accuracy – and it is also a no-charge service, and it is excellent preparation for the fire damper inspection stage. The downside is that we often find that drawings are incomplete as they omit building alterations and extensions.

Once we have completed the survey, we will provide a quotation to inspect, test and reset the fire dampers all in accordance with the standards set out in Technical Bulletin VH001 (March 2021) which reflects the requirements set out in BS 9999 (2017).

Please contact us to discuss which type of survey best suits your needs.

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