En bref
Le crib 5 fire rating is a flammability classification under the British standard BS 5852. It measures whether an upholstered piece resists ignition from a small wooden crib set alight on its surface. Contract furniture for hotels and public spaces is built to pass it, which is why the rating sits behind most commercial seating you sit on.
Specify upholstered furniture for a hotel in the United Kingdom and one term decides whether it is even allowed in the building: the crib 5 fire rating. It is the flammability standard a sofa, chair, headboard or mattress must pass before a property can put it in a guest room, a lobby or a restaurant, and a piece that misses it can fail a fire inspection no matter how well it is made. This guide sets out what crib 5 is, how the test works, how it sits against crib 7, which furniture has to carry it, and how a buyer checks that a supplier’s claim is real — with links to the deeper guides for fabric, quality and sourcing. The seating itself, built to a contract fire standard, sits in our assise pour les clients d'un hôtel gamme.
What Crib 5 Means: the Fire Rating Explained
Réponse rapide
The crib 5 fire rating is a flammability classification under the British standard BS 5852. It tests whether an upholstered piece resists ignition from a small wooden crib burned on its surface, the fifth and most demanding of the standard’s everyday ignition sources. Contract furniture for hotels and public spaces is built to pass it.
Crib 5 is shorthand for one specific test result inside BS 5852, the British standard that grades how upholstered furniture behaves when something sets it alight. The standard runs through a ladder of ignition sources, from a smouldering cigarette at the bottom to progressively fiercer flames. Crib 5 names the result a piece earns when it withstands ignition source five, and for contract upholstery it is the line that matters.
Crib 5 and the BS 5852 standard
BS 5852 sets out a series of ignition sources that a tester applies to an upholstered composite, each tougher than the last. Sources zero and one cover a cigarette and a lit match; the higher sources use small timber assemblies, the cribs, that burn hotter and longer. The crib 5 fire rating marks the point on that ladder that British practice treats as the contract benchmark, demanding enough for public buildings without reaching the extreme levels reserved for secure settings.
Crib 5 and the other BS 5852 ignition sources
It helps to see crib 5 in the company it keeps. BS 5852 runs a graded set of ignition sources: source zero is a smouldering cigarette, source one a small flame standing in for a match, and sources two through seven are wooden cribs of rising size and heat. Domestic seating in the United Kingdom answers mainly to the cigarette and match tests, while contract seating climbs to the cribs, and crib five is the rung the hospitality trade settles on. Naming the source number is what makes a fire claim precise — “fire-retardant” alone says little, while “crib 5 to BS 5852” states exactly which test a piece survived and gives a buyer something concrete to verify rather than a marketing word to trust.
Where the crib name comes from
The name is literal. The tester builds a small structure of wooden sticks — a crib — sets it on the upholstery, lights it, and watches how the seat reacts. Crib five uses a defined arrangement of those sticks, sized to deliver a specific, repeatable heat load. A piece earns the crib 5 fire rating when that burning crib fails to set the upholstery alight in a self-sustaining way within the measured time.
Crib 5 meaning in plain terms
Stripped of the standards language, crib 5 means a simple thing: this seat will not readily catch fire and feed a blaze if a real ignition source lands on it. That is the whole point of the rating in a hotel, where one chair that ignites easily turns a contained incident into a spreading one. A piece that holds the crib 5 fire rating buys a property time and slows a fire rather than fuelling it. In a building full of guests who do not know the exits, those minutes are the difference the rating quietly pays for.
How the Crib 5 Fire Rating Test Works
Understanding the test makes a buyer far harder to mislead, because it shows that the crib 5 fire rating belongs to a whole upholstery build, not to a single fabric. The procedure is precise, and what it measures decides the result.
The wooden crib ignition test
A laboratory mounts the upholstery composite on a test rig, builds the number-five wooden crib on the seating surface, soaks it with a measured amount of fuel, and ignites it. From that moment the tester records how the material responds: whether it ignites, how far any flame travels, and whether the burning stops on its own once the crib has consumed itself. A composite that keeps the fire from taking hold, and shows no flaming or smouldering beyond the set limits, passes.
What pass and fail actually measure
The test does not ask whether a material burns at all; almost anything will under a fierce enough flame. It asks whether the upholstery sustains and spreads a fire after the ignition source dies. A pass means the seat starves the fire and goes out; a fail means the seat carries the fire onward. That distinction — self-extinguishing rather than fire-feeding — is the safety margin the crib 5 fire rating exists to guarantee.
Why the lab tests the whole composite, not the fabric alone
A sofa is a stack: a face fabric over a layer of foam, sometimes over a fire-retardant barrier cloth, on a frame. The crib 5 fire rating applies to that stack as a system, because a fabric that passes over one foam can fail over another. This is the single most misunderstood point in the topic, and it is where a careless purchase goes wrong.
Crib 5 belongs to the composite, not the fabric alone
The most common and most expensive mistake is treating crib 5 as a property of a fabric. It is not. The finished composite — fabric, interliner and foam together — earns the rating, so a “crib 5 fabric” still has to pass over the exact foam it will sit on. A buyer who confirms the composite, not just the cloth, is the one who actually receives compliant furniture.
Crib 5 vs Crib 7 and the Ignition Sources
Crib 5 is not the top of the scale, and knowing where it sits stops a property over-specifying or under-specifying its furniture. The difference between crib 5 and crib 7 comes down to the severity of the setting, not the quality of the piece.
| Feature | Crib 5 | Crib 7 |
|---|---|---|
| Typical setting | Hotels, restaurants, offices, public buildings | High-risk settings such as prisons and secure units |
| Fire resistance | Contract level for general public safety | Extreme level for the highest-risk environments |
| Ignition source | BS 5852 wooden crib source five | BS 5852 wooden crib source seven, hotter and larger |
| What it signals | Standard hospitality compliance | Specialist, beyond ordinary hotel need |
Where crib 5 is the right call
For the overwhelming majority of hospitality work, crib 5 is the standard to specify, and a property rarely needs to think past it. Hotels, restaurants, bars, lounges and offices all sit in the band the crib 5 fire rating targets, balancing real fire safety against furniture that still looks and feels like hospitality rather than a cell. It is the level a fire risk assessment for a typical hospitality building expects to see, no more and no less.
When a setting calls for crib 7 instead
Crib 7 belongs to settings where the fire risk runs far higher and ignition may be deliberate — secure psychiatric units, prisons and similar environments. Specifying crib 7 for an ordinary hotel rarely makes sense, since it narrows the fabric and material choices sharply for a level of protection the setting does not call for. Matching the rating to the risk is the discipline, and for hotels that match is almost always crib 5.
What Hotel Furniture Needs to Be Crib 5
The crib 5 fire rating reaches across more of a property than buyers expect, because it follows the upholstery rather than the room. Wherever a piece carries fabric and foam in a public commercial space, the rating comes into play.
Upholstered seating, sofas and chairs
Seating is the heart of crib 5, since a sofa or armchair carries the most upholstery and sits where people gather. Lobby lounges, restaurant chairs, bar stools with padded seats and guest-room tub chairs all fall under the rating, which is why our assises dans la salle d'hôtes, lobby furniture et Meubles de restaurant ranges are built to a contract fire standard from the frame out.
Headboards, beds and mattresses
Guest-room sleeping furniture sits squarely inside the rating too. Upholstered headboards carry fabric over foam exactly as a sofa does, and contract mattresses for hotels answer to the same flammability expectations. A property furnishing bedrooms treats the bed as a fire-rated item, not a soft furnishing exempt from the rules.
Does office and back-of-house furniture need crib 5?
Padded office chairs and breakout seating in commercial premises generally fall under the same public-space fire expectations, so a property treats upholstered back-of-house pieces with the same care as front-of-house ones. The safe working rule is simple: if a piece in a commercial building carries upholstery, assume it needs the crib 5 fire rating until a specification says otherwise.
Contract crib 5 against domestic UK fire rules
A point that trips up buyers crossing from home furnishing to hospitality: domestic and contract furniture answer to different fire rules in the United Kingdom. Furniture for the home meets the cigarette and match tests of the domestic regulations and carries a permanent fire label to show it. Contract furniture for hotels and public spaces climbs further, to the crib 5 fire rating, because the setting and the duty of care demand more. A property that furnishes a hotel with domestic-grade seating, however well made, has bought furniture built to the wrong standard for the room — which is why genuinely fire-resistant hotel furniture starts with the word contract rather than a brochure adjective, and why a buyer checks the standard before the styling.
Crib 5 Fabric, Foam and Materials
Because the rating lives in the composite, the materials a property chooses decide whether a piece can pass at all. A few points clear up the questions buyers ask most about crib 5 fabric and fillings.
What makes a fabric crib 5
A fabric reaches crib 5 in one of two ways: woven from inherently flame-retardant fibres, or treated with a flame-retardant finish, and then tested over the intended foam. Many contract fabrics carry a crib 5 fire rating when paired with a fire-retardant interliner that sits between cloth and foam. The detail that matters for a buyer is the pairing on the certificate, not a general claim that a cloth is “crib 5”.
Treated fabrics and inherently flame-retardant ones
Two routes reach the same rating, and they age differently. An inherently flame-retardant fabric carries its fire performance in the fibre itself, so washing and years of guest wear do not strip it away. A treated fabric earns its crib 5 result from a flame-retardant finish or a backcoating, which performs well on the test day but asks for more care across a long service life, since heavy cleaning can wear a finish down. Other contract fabrics lean on a fire-retardant interliner beneath an untreated face cloth, which widens the looks a property can specify while still clearing the test. Knowing which route a fabric takes tells a buyer how the seat behaves after years of cleaning, not only on the day it left the laboratory.
Is real leather crib 5?
Real leather is not automatically crib 5. Leather performs reasonably against flame, but a hide still has to pass as part of its finished composite, and a barrier layer is often added to bring a leather seat to the rating with confidence. A property specifying leather seating asks for the tested composite result rather than assuming the material clears the bar on its own.
Foam, interliners and the fillings underneath
The foam carries much of the fire risk, so combustion-modified foam and, where needed, a fire-retardant barrier cloth do most of the work behind a crib 5 result. How those materials wear, clean and last over years of guest use is a separate question, and our guide to hotel upholstery covers the fabric and cushion side in full.
Ask for the certificate that matches your exact build
A supplier that builds crib 5 furniture as routine produces the test certificate for the specific fabric-and-foam composite on order, not a generic letter. The certificate names the materials tested together and the result they earned. If the paperwork does not match the build going into your rooms, the crib 5 fire rating on the brochure means little, and a fire inspector will say so.
Crib 5 Certification and Compliance
A rating is only as good as the proof behind it, and on fire safety that proof carries legal weight. A property protects itself by treating crib 5 certification as a document to collect and keep, not a claim to take on trust.
What a crib 5 certificate proves
A crib 5 certificate records that a named composite passed BS 5852 ignition source five at an accredited laboratory. It identifies the fabric, the foam or filling, any interliner, and the result, so a property can match the certificate to the furniture it actually received. Keeping that documentation on file is what lets a hotel answer a fire officer’s question with paper rather than hope.
Does UK law require crib 5, and where?
In the United Kingdom, fire safety law and the duties placed on those responsible for public buildings drive contract upholstery toward the crib 5 standard, and a hospitality property that ignores it risks failed inspections and serious liability after an incident. Requirements differ by country, so a project exporting to another market confirms the local fire standard for that destination rather than assuming crib 5 travels everywhere unchanged.
What documentation a property should keep
Compliance lives in a folder as much as in the foam. For each upholstered line in a property, a buyer keeps the BS 5852 crib 5 certificate, the composite description it covers, and the delivery records that tie that certificate to the furniture installed. When a fire officer or an insurer asks how the seating in a lounge meets the standard, that file answers in seconds rather than days. A property that gathers the paperwork at delivery, while the order is fresh and the supplier still close, spares itself the far harder task of rebuilding the trail years later from a maker who may have changed its range or moved on entirely.
Can a sofa be sold without a fire-safety label?
Furniture sold for use carries fire-safety documentation appropriate to its market, and for contract pieces that means traceable test evidence rather than a bare claim. A buyer who receives upholstered furniture with no fire paperwork at all treats that absence as a warning, since verifying the rating after the fact is far harder than insisting on it at the order. Confirming compliance is part of a wider check, which our hotel furniture quality control checklist sets out alongside the other inspections an order deserves.
Sourcing Crib 5 Compliant Hotel Furniture
Knowing the standard is half the job; the other half is buying from a maker who meets it without prompting. Sourcing crib 5 furniture well comes down to working with contract manufacturers who treat fire compliance as routine rather than an extra.
What a contract manufacturer should provide
A capable contract supplier specifies crib 5 by default for hospitality work, builds the composite to pass, and hands over the matching certificate without a second request. That habit separates a maker who understands public-space furniture from one adapting a domestic line, and how to find and vet such a partner sits in our guide to hotel furniture suppliers and the wider procurement steps in our guide to buying hotel furniture.
Reading a crib 5 claim on a quote
A supplier’s quote often carries a fire line, and reading it well saves trouble later. A precise claim names the standard and the source — crib 5 to BS 5852 — and ties it to the composite rather than the fabric alone. A vague claim says only “fire-retardant” or “fire-rated” and leaves a buyer to guess which test, if any, the piece passed. When a quote stays vague on fire, the safe response is to ask for the certificate before the order rather than after it, since a claim that no paperwork can back tends to dissolve under a fire officer’s questions on opening week.
Common crib 5 mistakes to avoid
A handful of errors recur often enough to name. The first is buying on a fabric’s crib 5 claim alone and pairing it with an untested foam, which voids the result. The second is specifying crib 7 for an ordinary hotel and paying in limited choice for protection the setting never needed. The third is accepting furniture with no fire paperwork and meaning to sort it later, which rarely happens once the rooms fill. The fourth is assuming a rating that satisfies one country travels unchanged to another. Each mistake traces back to the same root — treating the crib 5 fire rating as a label rather than a tested, documented result — and each falls away when a buyer insists on the certificate that matches the build.
Building fire compliance into the brief
The cleanest way to guarantee a crib 5 fire rating across an order is to write it into the specification from the start — naming the standard, the composites and the certification a property expects — rather than discovering a gap on delivery. HFC builds contract hotel furniture to the fire standards a project’s market demands, works trade and project only with no retail sales, ships to more than thirty countries with a two-year warranty, and supplies the test documentation each order needs. To brief furniture built and certified for your spaces, you can tell us about your project.
Foire aux questions
What is a crib 5 certificate?
A crib 5 certificate is the laboratory document recording that a specific upholstery composite passed BS 5852 ignition source five. It names the fabric, foam and any interliner tested together and the result they earned, so a property can match the paperwork to the furniture it actually received and keep it for fire inspections.
What does crib 5 mean in fabric?
Crib 5 in a fabric means the cloth has been shown to meet the crib 5 fire rating when tested over its intended foam, often with a fire-retardant interliner between them. The rating belongs to the whole composite, so a crib 5 fabric still needs testing over the exact foam it will cover.
Is real leather crib 5?
Real leather is not automatically crib 5. Leather resists flame reasonably, but it still has to pass as part of its finished composite, and makers often add a barrier layer to reach the rating with confidence. A property specifying leather seating asks for the tested composite result rather than assuming the hide clears the standard alone.
Does office furniture need to be crib 5?
Padded office and breakout seating in commercial buildings generally falls under the same public-space fire expectations as hospitality furniture, so a property treats upholstered office pieces with the same care. The safe rule is to assume upholstered furniture in a commercial setting needs the crib 5 fire rating unless a specification states otherwise.
What is the difference between crib 5 and crib 7?
Both sit under BS 5852, but crib 7 uses a hotter, larger ignition source than crib 5. Crib 5 is the contract standard for hotels, restaurants and public buildings, while crib 7 covers high-risk settings such as prisons and secure units. Matching the rating to the risk keeps a hotel from over-specifying.
Can you sell a sofa without a fire-safety label?
Upholstered furniture sold for use carries fire-safety documentation appropriate to its market, and for contract pieces that means traceable test evidence rather than a bare claim. A buyer who receives a sofa with no fire paperwork treats that absence as a warning, since verifying the rating after delivery is far harder than insisting on it at the order.
