Why Fire-Rated Sash Windows Matter – The Overlooked Risk
Fire safety is often framed around doors, alarms, and designated escape routes, yet one of the most vulnerable and underestimated fire pathways in a home is its windows. Traditionally designed sash windows—hallmarks of historic properties, Victorian terraces, and period homes across London—were never engineered with fire resistance in mind. This leaves countless properties unknowingly exposed, especially in the event of a fast-moving fire where a compromised window can accelerate flame spread, increase structural failure, and severely impact evacuation times.
At London Sash Window Experts, we’ve seen firsthand how the wrong glazing choices—or simply overlooking fire-rated options—can mean the difference between containment and catastrophe. But what does “fire-rated” truly mean, and why should homeowners, landlords, and property managers care?
A Window’s Role in Fire Containment
When a fire breaks out, its behavior is dictated by air flow, oxygen levels, and structural containment. Non-fire-rated windows, particularly traditional single-glazed sash windows, fail almost immediately under extreme heat. The glass shatters within minutes, often before the fire has fully engulfed the room, and the frames—especially untreated timber—can ignite within moments.
A fire-rated sash window, however, is designed to withstand temperatures of up to 900°C for at least 30 minutes, providing a critical barrier against flame spread. The difference between a fire-rated and non-fire-rated window isn’t just about glass—it’s about structural integrity, controlled smoke leakage, and critical evacuation time.
Consider this scenario:
- A fire starts in the kitchen of a top-floor flat, an all-too-common ignition point.
- Within two minutes, heat builds up, and the flames begin pressing against the window.
- A standard sash window fails, shattering before the fire even breaches the door, sending flames into adjoining properties or external wooden structures.
- Within five minutes, the fire spreads to the escape route, compromising evacuation possibilities.
Now, imagine the same scenario with a 30-minute fire-rated sash window installed:
- The glass resists cracking, keeping the fire contained.
- The frames remain structurally stable, preventing the spread of flames.
- The fire is slowed, giving emergency responders time to intervene before it engulfs neighboring areas.
This containment factor is why fire-rated glazing isn’t just a safety feature—it’s a life-saving necessity.
Legal & Insurance Consequences of Overlooking Fire-Rated Windows
Beyond safety, fire-rated sash windows are a legal requirement in certain properties, particularly HMOs (Houses in Multiple Occupation), rental properties with shared escape routes, and period homes undergoing structural renovations. Failure to comply doesn’t just expose occupants to risk—it can also:
- Invalidate insurance policies if a fire spreads through a non-compliant window.
- Lead to significant fines or legal penalties for landlords.
- Reduce property value due to poor fire safety ratings.
At London Sash Window Experts, we specialize in retrofitting and installing fire-rated sash windows that align with both heritage aesthetics and modern safety standards. Our solutions ensure that homeowners meet compliance regulations without sacrificing the character of their property—because fire safety should never come at the cost of architectural beauty.
Beyond Compliance – Investing in Future-Proofed Safety
A common misconception among homeowners is that fire-rated windows are only necessary if explicitly required by law. However, the reality is that fires do not discriminate based on legal requirements.
Installing fire-rated sash windows isn’t just about meeting regulatory standards—it’s about investing in a resilient, future-proofed home that is:
- Safer for occupants, providing vital minutes for escape.
- More insurable, reducing the likelihood of policy disputes in case of fire damage.
- Architecturally preserved, retaining period charm while discreetly integrating modern fire-resistant materials.
At London Sash Window Experts, we help property owners make informed, proactive decisions that don’t just protect their homes, but enhance them with lasting security. With a wide range of custom fire-rated sash window solutions, including heritage-compatible glazing and timber treatments, we ensure that every installation serves a dual purpose: preserving history and protecting lives.
A Window of Opportunity – Act Before It’s Too Late
Many homeowners only consider fire safety upgrades after an incident occurs—a reactionary approach that can come at a devastating cost. The best time to install fire-rated sash windows is before you ever need them.
With rising fire safety standards and growing insurance scrutiny, ensuring your sash windows are fire-rated isn’t just advisable—it’s becoming essential. London Sash Window Experts can guide you through the process, from assessment and compliance checks to seamless installation, ensuring that your home remains both historically authentic and exceptionally protected.
The decision is simple: Secure your property before disaster makes the choice for you.
UK Fire Safety Laws & Compliance – What You Don’t Know Could Cost You
Fire safety regulations exist not as administrative hurdles but as structural safeguards designed to contain fire, slow its progression, and protect both life and property. In London, where period homes, converted flats, and listed buildings define much of the architectural landscape, ensuring compliance with fire-rated sash window requirements is more than a legal checkbox—it’s a functional necessity tied to urban fire risk, tenant safety, and property insurance stability.
While building regulations dictate where fire-rated windows must be installed, the responsibility of ensuring compliance ultimately falls on property owners, landlords, and managing agents. Overlooking these requirements isn’t just an oversight—it can lead to catastrophic liabilities, from voided insurance policies to legal penalties and even criminal negligence charges in the event of a fatality.
When Are Fire-Rated Sash Windows Required?
Fire-rated sash windows are compulsory in properties where windows are part of an escape route or critical containment barrier, particularly in:
- Houses in Multiple Occupation (HMOs) – Rental properties with shared living spaces.
- Flats Above Commercial Premises – Particularly where the escape route relies on fire containment.
- Listed Buildings & Period Conversions – Where compliance must be balanced with conservation regulations.
- Multi-Level Properties – Buildings where a failure in containment could allow a fire to spread between floors.
While compliance is legally mandated in these cases, homeowners in non-HMO single-family dwellings should not assume they are exempt from risk—fire spreads indiscriminately, and properties with standard sash windows remain structurally vulnerable.
The Consequences of Non-Compliance
Failure to install fire-rated sash windows where required can result in:
- Insurance Invalidation – If a fire spreads due to inadequate containment, insurers may reject claims.
- Legal Fines & Enforcement Orders – Particularly for rental properties under the Housing Act 2004.
- Negligence Liability – Landlords and property owners can face prosecution under the Regulatory Reform (Fire Safety) Order.
- Devaluation of Property – Future sales and lettings may be restricted if fire compliance isn’t met.
At London Sash Window Experts, we specialize in bringing period homes and rental properties into full compliance without compromising heritage aesthetics. Our fire-rated sash window solutions meet BS EN 1634-1 certification, ensuring your property remains legally sound, insurable, and protected.
Stay Ahead of Regulatory Change
Fire regulations are evolving, and post-Grenfell fire safety reforms are placing increasing scrutiny on landlords and developers. What is advisory today may be mandatory tomorrow. A proactive approach to fire-rated sash window installation ensures you meet current and future standards while safeguarding occupants and investments.
London Sash Window Experts offers compliance consultations, certified fire-rated installations, and full regulatory guidance to ensure your property is protected before legislation forces an expensive retrofit.
Act now—before non-compliance becomes a cost you can’t afford.
What Actually Makes a Sash Window Fire-Rated?
The integrity of a fire-rated sash window is not determined by a single feature but by a system of engineered components designed to resist flame penetration, limit heat transfer, and slow the passage of smoke. Unlike standard sash windows, which can fail within minutes under fire exposure, fire-rated alternatives maintain their structure for at least 30 minutes, providing crucial evacuation time and fire containment.
At London Sash Window Experts, we specialize in precision-engineered fire-rated sash windows that align with heritage conservation requirements while exceeding modern fire safety standards. But what separates a true fire-rated sash window from an ordinary glazed unit?
Fire-Rated Glass – More Than Just Toughened Glass
A common misconception is that toughened glass offers fire resistance. In reality, toughened glass fails at approximately 250°C, often shattering before flames reach the window. Fire-rated glass, by contrast, is designed to withstand temperatures of up to 900°C for a sustained period.
Key Fire-Rated Glass Types:
- Insulated Fire-Resistant Glass (e.g., Pilkington Pyrostop) – Blocks both heat and flames, reducing the risk of fire spreading beyond the point of ignition.
- Georgian Wired Glass – Resists breakage and prevents the collapse of the glass pane, commonly used in heritage applications.
- Integrity-Only Glass (e.g., Pyroshield 30/60) – Maintains a barrier against flames but does not reduce heat radiation.
Each fire-rated sash window installation at London Sash Window Experts is matched to the specific fire risk profile of the property, ensuring compliance with BS EN 1634-1 certification.
The Role of the Window Frame – A Fire Barrier, Not Just a Structure
A fire-rated sash window is only as effective as its frame and surrounding structure. Traditional untreated timber, while historically accurate, burns rapidly, while unreinforced uPVC deforms and fails under heat exposure.
Fire-Rated Frame Materials:
- Fire-Treated Hardwood – Slows combustion and meets fire-resistance standards while maintaining a period-accurate aesthetic.
- Steel & Composite Frames – Offer higher fire resistance and are commonly used in modern developments.
- Intumescent Seals – Expand under heat, blocking smoke and fire from penetrating gaps.
Beyond Fire Resistance – Smoke Control & Structural Stability
Smoke inhalation is responsible for more fire-related deaths than burns. A fire-rated sash window must limit not only flame spread but also smoke leakage. At London Sash Window Experts, our installations include:
- Draught-proof smoke seals – Prevent smoke ingress through sash gaps.
- Integrity-rated locking mechanisms – Ensuring the window does not disengage under heat stress.
- Glass-to-frame fire-stopping adhesives – Prevent heat transfer from glazing to timber.
A true fire-rated sash window is a system, not just a product. Installing the correct glazing without the proper frame, sealants, or fire-resistant treatments is a half-measure that compromises safety.
Investing in Proven Fire Safety
Fire-rated sash windows are not optional extras—they are a critical component of a property’s fire defense system. At London Sash Window Experts, we ensure every fire-rated window we install is tailored to specific regulatory and architectural requirements, ensuring both compliance and aesthetics are preserved.
The question is not whether your property can have fire-rated sash windows—it’s whether you can afford to be without them.
Fire-Rated Sash Window Myths That Put Lives at Risk
Despite the increasing enforcement of fire safety regulations, misconceptions about fire-rated sash windows persist, leaving many properties vulnerable to fire spread. These myths often stem from misunderstandings about fire-rated materials, improper product labeling, and a general underestimation of fire risk in period properties. Believing these misconceptions doesn’t just put buildings at risk—it endangers lives.
At London Sash Window Experts, we routinely encounter homeowners and landlords who have been misled by outdated information. Let’s dismantle the most dangerous myths before they result in compliance failures, insurance voidance, or worse—a fire that could have been prevented.
Myth #1: “Toughened Glass is Fire-Rated”
Toughened glass is often marketed as a “safety glass”, leading many to assume it offers fire resistance. In reality:
- Toughened glass fails at around 250°C, often exploding outward under heat stress, accelerating fire spread.
- Fire-rated glass (e.g., Pilkington Pyrostop, Georgian Wired) is designed to withstand temperatures of up to 900°C for 30-60 minutes, providing critical containment.
- Regulatory warning: BS EN 1634-1 fire compliance requires certified fire-resistant glazing—toughened glass does not qualify.
Myth #2: “Timber Sash Windows Can’t Be Fire-Rated”
There’s a widespread belief that timber is inherently flammable, making it unsuitable for fire-rated applications. This is only true for untreated softwood—modern fire-rated sash windows use:
- Fire-treated hardwoods that resist combustion and are certified for 30-60 minutes of fire resistance.
- Intumescent coatings that expand under heat, sealing gaps and reducing ignition risk.
- Reinforced glazing systems that prevent heat transfer from glass to frame.
At London Sash Window Experts, we manufacture heritage-accurate, fire-rated timber sash windows that meet compliance without compromising architectural integrity.
Myth #3: “Fire-Rated Windows Ruin the Look of Period Properties”
Many assume fire-rated sash windows look like bulky, industrial fixtures unsuitable for heritage buildings. In reality:
- Modern fire-rated glazing is indistinguishable from standard glass—no visible wires or distortions.
- Custom fire-rated timber frames replicate traditional profiles, preserving period aesthetics.
- Conservation approval is achievable with properly designed fire-rated sash solutions.
At London Sash Window Experts, we craft fire-rated sash windows that blend seamlessly into historic façades, ensuring compliance without visual compromise.
Myth #4: “Fire-Rated Windows Are Too Expensive to Justify”
The assumption that fire-rated sash windows are a luxury rather than a necessity is a costly mistake. Consider:
- The average fire-rated sash window costs between £800 – £1,500 per window—a fraction of the £20,000+ in damages caused by an uncontrolled fire.
- Insurance premiums are lower for properties with certified fire containment measures.
- Failing compliance can lead to fines and legal liabilities—especially for landlords and HMO owners.
The cost of not upgrading vastly outweighs the investment in fire-rated solutions.
The Truth About Fire-Rated Sash Windows
Every fire-rated sash window is an engineered safety system, combining:
- Certified fire-resistant glazing.
- Fire-treated frames and seals.
- Heritage-compatible design options.
At London Sash Window Experts, we specialize in authentic, regulation-compliant fire-rated sash windows that don’t force homeowners to choose between safety and aesthetics.
Don’t let outdated myths leave your property exposed to risk. Fire-rated sash windows aren’t about compliance alone—they’re about protecting lives.
Choosing the Right Fire-Rated Sash Window – Buying Guide
Selecting a fire-rated sash window isn’t just about ticking a regulatory box—it’s about ensuring genuine fire resistance, structural integrity, and architectural compatibility. With misleading product claims and varying certification standards, homeowners, landlords, and property managers must be vigilant in distinguishing authentic fire-rated windows from unverified alternatives.
At London Sash Window Experts, we don’t just supply fire-rated sash windows—we ensure that every installation meets rigorous fire safety standards while maintaining the architectural integrity of period properties.
What Defines a True Fire-Rated Sash Window?
A certified fire-rated sash window consists of multiple components working together to contain fire, limit smoke passage, and slow structural degradation.
Key Requirements of a Fire-Rated Sash Window:
✔ Fire-Rated Glass – Must be certified to withstand at least 30-60 minutes of fire exposure (BS EN 1634-1).
✔ Frame Material – Fire-resistant timber, steel, or composite, treated to prevent combustion.
✔ Smoke Seals – Prevent toxic smoke from spreading, which is responsible for most fire-related fatalities.
✔ Structural Reinforcement – Engineered to maintain integrity under extreme heat conditions.
A sash window that only includes fire-resistant glass but lacks frame reinforcement or smoke seals is not fire-rated—it’s a partial solution that fails under real-world fire conditions.
Red Flags – How to Spot Fake “Fire-Rated” Windows
The market is full of misleading claims, often from suppliers who offer fire-resistant glass in a standard frame without full certification. Common red flags include:
- No BS EN 1634-1 Certification – Without this, the window is not fire-rated.
- Toughened Glass Instead of Fire-Resistant Glass – Toughened glass fails under extreme heat.
- No Fire Testing Reports – Always request documented proof of fire resistance testing.
- Generic Frames Without Fire Treatments – A fire-rated window is a system, not just glazing.
At London Sash Window Experts, we only install fully certified fire-rated sash windows, ensuring that every component—glass, frame, seals, and fixings—meets UK fire safety standards.
Selecting the Right Fire-Rated Window for Your Property
Choosing the right fire-rated sash window involves balancing compliance, aesthetics, and long-term durability.
Considerations When Choosing a Fire-Rated Sash Window:
- Heritage vs. Modern Design: Does your property require period-accurate timber sash windows, or are steel/composite frames acceptable?
- Fire Resistance Rating: Ensure the window meets at least 30-minute resistance for regulatory compliance.
- Insurance & Compliance Requirements: Non-certified windows may invalidate fire insurance policies.
- Customization Needs: Are you looking for double glazing, acoustic insulation, or conservation-friendly options?
At London Sash Window Experts, we provide custom fire-rated sash solutions, ensuring that every installation meets both legal requirements and the aesthetic demands of period properties.
Invest in Verified Fire Protection
A fire-rated sash window isn’t an expense—it’s a long-term safeguard. With increased scrutiny on fire compliance and insurance policies demanding proof of fire resistance, now is the time to ensure your windows meet the necessary standards.
📌 At London Sash Window Experts, we guarantee:
- BS EN 1634-1 Certified fire-rated sash windows.
- Bespoke designs tailored to heritage properties.
- Full installation & compliance documentation for insurance approval.
The right fire-rated sash window is more than just glass—it’s a complete, engineered safety solution. Make the right investment today.
The True Cost of Ignoring Fire-Rated Sash Windows
Fire-rated sash windows are often seen as a discretionary upgrade rather than an essential safeguard—a perspective that undervalues the role of fire containment in protecting lives, property, and financial stability. While the upfront cost of installing fire-rated windows might seem like an avoidable expense, the true cost of not upgrading extends far beyond what most homeowners and landlords anticipate.
At London Sash Window Experts, we’ve seen firsthand how failure to implement proper fire containment measures has led to devastating consequences—both in terms of human safety and financial losses. The reality is that fire doesn’t wait for regulatory enforcement or budget approval—it moves rapidly, consuming unprotected properties in minutes.
The Financial & Legal Risks of Non-Compliance
Fire regulations are not recommendations—they are legally enforced for a reason. When landlords, developers, or homeowners fail to meet fire-rated window requirements, they expose themselves to:
- Insurance Claim Rejections – Insurers may refuse to cover fire-related damage if non-compliant windows contributed to flame spread.
- Legal Consequences – Under the Regulatory Reform (Fire Safety) Order 2005, landlords face fines and legal action for failing to meet fire containment requirements.
- Property Devaluation – Non-compliant properties are flagged as high-risk, reducing their resale value and mortgage eligibility.
- Enforcement Notices & Retrofitting Costs – If a property fails a fire inspection, forced upgrades are often more expensive than preemptive compliance.
In London’s rental and HMO market, fire-rated windows are not a luxury—they are a legal necessity. Non-compliance can result in thousands of pounds in fines and the inability to legally rent or sell a property.
Fire Damage Costs vs. Fire-Containment Investment
Comparing the cost of installation vs. the potential losses from a fire makes the economic argument clear.
| Scenario | Average Cost (£) |
| Fire-Rated Sash Window Installation | £800 – £1,500 per window |
| Average Fire Damage Repair | £20,000 – £150,000 |
| Legal Fines for Non-Compliance | Up to £30,000 |
| Potential Insurance Payout Loss | £100,000+ |
Ignoring fire-rated sash windows is not a cost-saving strategy—it is an exposure to financial liability and devastating loss.
The Hidden Cost: Life & Safety Risks
Fire statistics consistently show that smoke and heat spread through vulnerable windows faster than through doors. Delaying investment in fire-rated sash windows risks:
- Increased evacuation times – More than 50% of fire-related deaths occur due to inhabitable smoke conditions before fire reaches occupants.
- Higher likelihood of structural failure – Standard sash windows contribute to fire bridging between floors or adjacent properties.
- Longer fire containment response – A single non-fire-rated window failure can accelerate fire progression by 600%, making suppression more difficult.
At London Sash Window Experts, we bridge the gap between compliance, conservation, and modern fire safety, ensuring that heritage homes, rental properties, and commercial conversions meet fire standards without aesthetic compromise.
Investing in Protection, Not Just Compliance
A fire-rated sash window isn’t just a regulation—it’s a structural firewall, a safety measure, and a financial safeguard. At London Sash Window Experts, we provide:
- BS EN 1634-1 certified fire-rated sash windows tailored to property-specific risks.
- Full fire compliance assessments to ensure insurance and legal approval.
- Custom designs that preserve period aesthetics while enhancing fire resilience.
The cost of compliance is always lower than the cost of fire. Secure your property before non-compliance turns into an irreversible financial and safety disaster.
Get Fire-Rated Sash Windows in London – Act Now!
Fire safety is not a future concern—it’s an immediate necessity. Regulatory bodies are tightening fire containment laws, insurance providers are scrutinizing claims more rigorously, and building owners who fail to meet fire-rated window compliance are facing steep financial and legal consequences.
At London Sash Window Experts, we don’t just install fire-rated sash windows—we provide tailored fire protection solutions that integrate seamlessly into heritage and modern properties alike. Whether you are a homeowner, landlord, or property manager, the decision to install certified fire-rated sash windows is a direct investment in safety, compliance, and property resilience.
What You Gain by Upgrading to Fire-Rated Sash Windows
A fire-rated sash window is more than a physical barrier—it’s a multi-functional fire containment system that prevents fire and smoke spread, meets compliance, and protects investments.
Immediate Benefits of Installing Fire-Rated Sash Windows:
- Fire Containment & Escape Time: Certified for 30-60 minutes of fire resistance, allowing for safe evacuation.
- Insurance & Compliance Assurance: Meets BS EN 1634-1 standards, ensuring legal protection and validity of insurance claims.
- Property Value & Marketability: Fire compliance increases desirability in high-risk areas, particularly rental and listed properties.
- Seamless Integration: Our fire-rated sash windows maintain period aesthetics while offering modern fire protection.
Choosing London Sash Window Experts ensures that every window installed meets technical fire resistance standards, architectural compatibility, and regulatory requirements.
Why Work with London Sash Window Experts?
There are many fire-rated products on the market, but few providers understand the unique requirements of sash window conservation and fire compliance.
What Sets Us Apart:
✔ Certified Fire-Rated Installations – Every window meets BS EN 1634-1 certification for complete fire resistance.
✔ Period-Accurate Designs – We craft fire-rated sash windows that preserve original architectural character.
✔ End-to-End Service – From compliance assessments to full installation, we handle everything needed for legal approval.
✔ Custom Solutions for Every Property – Whether you need full replacements or fire-resistant retrofits, we provide tailored options.
How to Secure Your Fire-Rated Sash Windows Today
The decision to upgrade should be proactive, not reactive. Fire regulations are evolving, and delaying compliance can result in higher costs, insurance penalties, or enforcement action.
Take Action in Three Simple Steps:
1️⃣ Book a Compliance Consultation – We assess your property’s fire safety requirements and window eligibility.
2️⃣ Get a Bespoke Fire-Rated Solution – Receive a customized proposal based on your property type and compliance needs.
3️⃣ Certified Installation & Documentation – We install fully certified fire-rated sash windows with official documentation for insurance and legal approval.
At London Sash Window Experts, we ensure that fire-rated windows are seamlessly integrated into your property, delivering safety without aesthetic compromise.
📞 Call now: 020 452 51669
📩 Request a Quote
FAQs – Test Your Fire Safety Knowledge
Fire safety regulations are becoming stricter, insurance policies are tightening, and property owners are under increasing scrutiny to ensure fire containment measures are up to standard. Yet, misconceptions about fire-rated sash windows persist, leading to avoidable risks, financial liabilities, and compliance failures.
At London Sash Window Experts, we believe that well-informed property owners make the best decisions. Below are the most critical questions every homeowner, landlord, and property manager should be able to answer.
Q1: What’s the Difference Between Toughened Glass & Fire-Rated Glass?
Many assume that toughened glass—often marketed as a “safety glass”—is sufficient for fire protection. It isn’t.
- Toughened glass fails at 250°C and can shatter explosively under heat stress, accelerating fire spread.
- Fire-rated glass (e.g., Pilkington Pyrostop, Georgian Wired) withstands temperatures of 900°C for 30-60 minutes, providing crucial containment.
- Regulatory Standard: BS EN 1634-1 requires certified fire-resistant glazing, not just impact-resistant toughened glass.
If your window supplier is selling toughened glass as “fire-rated,” they are misleading you.
Q2: Do All Landlords Legally Need Fire-Rated Windows?
Not all landlords are required to install fire-rated sash windows, but in many cases, compliance is mandatory.
Fire-Rated Windows Are Required In:
✔ Houses in Multiple Occupation (HMOs) – Fire safety compliance is strictly enforced.
✔ Flats Above Commercial Premises – Escape routes must be protected with fire-rated windows.
✔ Converted Properties & Listed Buildings – Fire containment is required if modifications are made.
✔ Multi-Storey Rentals – Fire-rated windows are essential for compliance with Approved Document B.
Ignoring mandatory fire-rated window installation can lead to enforcement orders, fines, and insurance invalidation.
Q3: How Much Heat Can a Fire-Rated Sash Window Withstand?
- Standard sash windows fail within minutes, contributing to flame spread.
- Fire-rated sash windows endure temperatures up to 900°C for at least 30 minutes, allowing safe evacuation.
- Smoke seals prevent toxic fume leakage, which is responsible for more fire-related fatalities than burns.
At London Sash Window Experts, every fire-rated window is designed to withstand extreme fire exposure while preserving period aesthetics.
Q4: If a Fire Breaks Out, How Much Time Does a Fire-Rated Sash Window Buy You?
Time is the most critical factor in fire survival.
- Standard sash windows fail within 5 minutes, allowing fire and smoke to spread rapidly between floors.
- Fire-rated sash windows hold for 30-60 minutes, containing the fire and slowing its progression.
- 30 extra minutes can mean the difference between escape and entrapment—this is why fire-rated windows are essential in properties with limited exit points.
A single fire-rated sash window can prevent a localised fire from consuming an entire building.
Q5: Can You Tell If a Window is Fire-Rated Just by Looking at It?
No—fire-rated windows and standard windows can look identical. This is why certification is essential.
How to Verify If a Sash Window is Fire-Rated:
✔ Check for BS EN 1634-1 Certification – If it isn’t certified, it isn’t fire-rated.
✔ Review Fire Test Reports – Ask your supplier for official documentation.
✔ Inspect the Seals & Frames – Fire-rated windows must include smoke seals and fire-treated frames.
✔ Ask a Specialist – At London Sash Window Experts, we provide full fire compliance assessments to ensure authenticity.
Fire Safety Is a Choice—Make the Right One
Every misconception about fire-rated sash windows puts lives and property at risk. At London Sash Window Experts, we provide certified fire-rated sash window installations, heritage-compatible designs, and compliance consultations to ensure that your property is both protected and legally sound.
📞 Call now: 020 452 51669
📩 Request a Consultation
