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Extraction cleaning - the standard
TR19 Grease sits in an odd place: it is not a law, yet ignoring it can put you in breach of one. Understanding the difference between a standard and a statute is what makes the whole picture click into place.
The short answer
TR19 Grease is a specification published by the Building Engineering Services Association (BESA), not an Act of Parliament. In itself it is guidance, not statute. But it acquires real legal weight because fire-safety law expects you to manage the grease-fire risk, and TR19 Grease is the recognised way to do it - and because insurers write it into their conditions. So it is guidance that behaves, in practice, like a requirement.
What kind of document it is
TR19 Grease is a technical standard produced by BESA, the trade body for building engineering services. It sets out how kitchen extract systems should be cleaned and verified - what to clean, how to measure grease, what evidence to produce. Like other industry standards, it represents recognised good practice, but it is not itself legislation and no one is prosecuted for breaching TR19 Grease by name.
That is the source of the confusion. People hear TR19 Grease quoted with the authority of a rule, then discover it is not a law, and conclude they can ignore it. The second half of that reasoning is where it goes wrong.
How it gains legal force
The Regulatory Reform (Fire Safety) Order 2005 is the statute. It requires the responsible person to assess and control fire risk - an outcome, not a method. It does not tell you to follow TR19 Grease. But when your risk is greasy extract ductwork, TR19 Grease is the accepted method for controlling it and the accepted evidence that you have.
So the standard becomes the practical route to meeting the legal duty. If something went wrong and you had to show you had managed the extract-fire risk, a current TR19 Grease certificate is what demonstrates it; the absence of one leaves you explaining how you met a duty you have no evidence for. The law and the standard are two halves of the same expectation.
The commercial force
There is a second route by which TR19 Grease becomes binding, and for many operators it is the decisive one: insurance. Commercial policies covering premises with a kitchen frequently require extract cleaning to a stated frequency, certificated to the standard, as a condition of cover.
A policy condition is contractually binding whatever the statutory position. If the condition is not met and a fire follows, the insurer can reduce or refuse the claim. So even an operator determined to treat TR19 Grease as optional usually finds their own insurer has already made it mandatory in writing.
What it means for you
The precise answer - standard, not statute - is less useful than the practical one. Between fire-safety law that expects the risk managed and insurance that requires the certificate, TR19 Grease functions as a requirement for any commercial kitchen with powered extraction. Arguing that it is only guidance is technically correct and commercially irrelevant.
The constructive response is to treat it as the benchmark it is: have the system cleaned and measured to TR19 Grease, keep the certificate current, and you satisfy both the legal duty and the insurance condition at once. That is far simpler than defending the gap if either is ever tested.
Standards and law in general
TR19 Grease is not unusual in sitting between guidance and law - most technical standards do. Very few areas of safety are governed by a statute that spells out the method; instead the law sets a duty to control a risk, and industry standards describe the recognised way to meet it. Electrical work, gas, structural design and many others follow the same pattern: the standard is not the law, but following it is how you demonstrate you met the law.
Understanding that removes the false comfort of the it is only guidance argument. A standard being voluntary in name does not make ignoring it safe, because the enforceable duty behind it does not go away. TR19 Grease is simply a clear example of the general rule that recognised standards are how legal duties get met in practice.
What happens if you disregard it
The risk of treating TR19 Grease as optional is that nothing appears to go wrong - right up until something does. Day to day, a system that is not cleaned to the standard looks the same as one that is. The gap only becomes visible at the worst possible moment: a fire, an insurance claim, a fire risk assessment, or an enforcement visit, when the absence of a current certificate and readings suddenly matters a great deal.
By then the choice to skip the standard has become the most expensive decision on the site. Meeting it in advance is cheap and quiet; discovering you did not meet it is neither. That asymmetry is the real reason to treat the standard as a requirement rather than a suggestion.
The sensible reading
There is a place for knowing the precise legal status - it is a standard, not a statute - but for an operator the practical reading is what counts. Fire-safety law expects the grease-fire risk managed, TR19 Grease is the accepted way to do it, and insurers write it into their conditions. Between those three, it functions as a requirement, and treating it as anything less is a gamble with poor odds.
The constructive conclusion is the simple one: clean and certificate to the standard, keep the evidence current, and the whole standard-versus-statute question becomes academic. You have met the duty and the condition at once, and you never have to argue the fine distinction when it would matter most.
Questions
No. It is a standard published by BESA, not an Act of Parliament. You are not prosecuted for breaching TR19 Grease by name.
Because the Regulatory Reform (Fire Safety) Order 2005 requires you to manage fire risk, and TR19 Grease is the recognised method and evidence for controlling the grease-fire risk in kitchen extract systems.
Technically it is guidance, but in practice no. Fire-safety law expects the risk managed and insurers require the certificate, so it functions as a requirement for a commercial kitchen.
Policies covering a kitchen often require extract cleaning to a stated frequency, certificated, as a condition of cover. A policy condition is binding, and failing it can void a fire claim.
Have the system cleaned and measured to TR19 Grease and keep the certificate current. That satisfies both the fire-safety duty and the insurance condition at once.
The responsible person for the premises - usually the employer, owner or occupier - who holds the fire-safety duty under the Order.
We clean and certificate to TR19 Grease, giving you a single current evidence trail for both the law and your insurer.
