How to Choose Fire-Rated Ducting: A Guide for Specifiers & Contractors
When it comes to ensuring the safety and integrity of commercial, industrial, or public buildings, few
elements are as critical as fire-rated ducting. Ductwork is not just about air movement—it’s about
safeguarding occupants, protecting infrastructure, and ensuring compliance with strict fire safety
regulations.
At SEWS Ductwork, we specialise in the design, manufacture, and installation of high-quality fire-
rated ductwork across Essex and the wider UK. With over 20 years’ experience in the ventilation
sector, we combine expert knowledge with trusted products, including the renowned Firemac FM
Fire Duct systems, to deliver reliable, compliant, and efficient fire-rated solutions.
In this comprehensive guide, we’ll explore what fire-rated ducting is, its key features, compliance
requirements, and provide actionable advice for specifiers and contractors looking to make informed
decisions when selecting fire-rated ducting for their projects. Contact us today to get started!
What is Fire-Rated Ducting?
Fire-rated ducting, also known as fire-resistant ductwork, is specifically designed to contain or restrict
the spread of fire and smoke within buildings. Unlike standard ductwork, fire-rated systems are
engineered to maintain their structural integrity during a fire, helping to prevent the rapid spread of
flames, smoke, and toxic gases.
These systems are commonly installed in critical areas such as:
•Ventilation ducts in commercial buildings
•Smoke extraction systems in multi-storey offices or shopping centres
•Pressurisation systems in stairwells and fire escape routes
•Kitchen extract ducts in commercial kitchens
Fire-rated ducting is essential in ensuring buildings meet fire safety regulations, protect lives, and
mitigate property damage. At SEWS Ductwork, we provide fire-rated ducting with fire resistance
ranging from 60 minutes to 240 minutes, ensuring that every installation meets the specific safety
requirements of your project.
Fire-Rated Ducting Key Features
When selecting fire-rated ducting, it’s important to understand the core features that distinguish
these systems from standard ductwork. Key features include:
Fire Resistance
Fire-rated ducting is designed to withstand high temperatures for a specified period, typically 60,
120, or 240 minutes. The fire resistance rating is tested under standards such as BS476: Part 24: 1987
and EN 1366 Parts 1 & 8.
Smoke Containment
Fire-rated ducts prevent the movement of smoke between fire zones, reducing the risk of smoke
inhalation and enabling safe evacuation.
Robust Materials
High-quality galvanised or stainless steel is commonly used as a base material, often combined with
specialist fire protection fabrics like Firemac FM Fabric PSA, which reinforces ductwork against heat
and flame.
Insulation
Fire-rated ducts incorporate insulation materials that maintain structural integrity and temperature
control, crucial for both fire safety and energy efficiency.
Customisable Sizes and Shapes
Fire-rated ducting can be manufactured to bespoke dimensions to suit complex layouts and ensure
seamless integration into existing building systems.
Durability and Longevity
Beyond fire protection, these ducts are engineered to withstand the rigours of day-to-day operations,
including vibration, moisture, and temperature fluctuations.
Compliance Certification
Reputable fire-rated ducting products come with official certifications, ensuring that the system has
been rigorously tested and meets UK and international fire safety standards.
Understanding these key features ensures that specifiers and contractors can make informed
decisions when selecting fire-rated ducting. By prioritising fire resistance, smoke containment, robust
materials, and compliance certification, you can be confident that your ductwork will provide both
safety and long-term reliability for any building project.
Fire-Rated Ducting Compliance Requirements
Selecting fire-rated ducting isn’t just a matter of preference – it’s a legal and safety requirement.
Building designers, specifiers, and contractors must ensure compliance with several key standards
and codes:
Building Regulations (UK)
Fire safety compliance is enforced under Approved Document B, which outlines performance
standards for fire safety in buildings, including ductwork and smoke control systems.
BS476 Series
The British Standard BS476: Part 24 specifies fire resistance testing for ventilation ducts, ensuring
they maintain integrity and insulation under fire conditions.
EN 1366 Series
The European standard EN 1366 Parts 1 & 8 defines fire resistance tests for ventilation ducts and
smoke extraction systems.
Material Certifications
Fire-rated fabrics, insulation, and coatings must carry certification from recognised testing bodies,
verifying their effectiveness and durability under fire conditions.
Installation Standards
Compliance is not just about the product itself—correct installation is critical. Poorly installed fire-
rated ductwork can compromise fire safety, even if the product meets all relevant standards.
Maintenance and Inspection
Fire-rated ducting must be regularly inspected and maintained to ensure ongoing performance and
compliance with fire safety regulations.
At SEWS Ductwork, all our fire-rated ducting is manufactured and installed to meet or exceed these
compliance requirements, giving specifiers and contractors confidence in the safety and reliability of
every system.
How to Choose Fire-Rated Ducting: A Guide for Specifiers & Contractors
Selecting the right fire-rated ducting for your project can feel overwhelming. This section provides a
structured approach to help specifiers and contractors make informed decisions.
Understanding the Project Requirements
Before choosing a product, it’s vital to define the specific needs of your project:
•Fire Rating Required
Determine whether the ducts need 60, 120, or 240 minutes of fire resistance.
•Duct Type
Identify whether the project requires ventilation, smoke extract, pressurisation, or kitchen
extract ductwork.
•Material Considerations
Decide on galvanised or stainless steel based on corrosion resistance, weight, and location.
Evaluate Product Certifications
Always select fire-rated ducting with verified certifications, such as BS476: Part 24 and EN 1366
assessments. Check for Firemac FM Fabric PSA or equivalent materials with proven performance
records.
Consider Installation Flexibility
Fire-rated ducting must integrate seamlessly into the building design. Look for manufacturers who
can customise sizes, shapes, and layouts, ensuring ducts fit within existing structures without
compromising fire safety.
Assess Durability and Maintenance Requirements
Fire-rated ductwork should withstand the environment it operates in. Consider:
•Resistance to moisture and condensation
•Vibration tolerance
•Ease of inspection and cleaning
Review Manufacturer Experience and Support
Choose suppliers with extensive experience in fire-rated ductwork installations. SEWS Ductwork has
over 20 years of sector experience and can manufacture, deliver, and install all fire-rated ducting to
project specifications.
Plan for Compliance Documentation
Ensure all ducts come with comprehensive documentation for compliance audits. This includes:
•Product test certificates
•Installation manuals
•Maintenance guidelines
Budget Considerations
While cost is important, fire safety should never be compromised. Evaluate value for money by
considering the combination of product quality, compliance, durability, and manufacturer support.
Installation Expertise
A high-quality product is only effective if installed correctly. Ensure that the installation team:
•Is trained in fire-rated ductwork techniques
•Follows manufacturer guidelines
•Understands compliance standards
Integration with Fire Safety Systems
Fire-rated ducting should complement other fire safety measures, including:
•Smoke detectors and alarms
•Sprinkler systems
•Fire doors and compartmentation
Quality Assurance
Finally, look for manufacturers who offer post-installation support, inspection, and quality assurance
to maintain long-term safety and performance.
By following these steps, specifiers and contractors can confidently select fire-rated ducting that
meets both regulatory requirements and project needs.
The Importance of Professional Fire-Rated Ducting
Fire-rated ducting is a critical component of any building’s passive fire protection strategy. Choosing
professional-grade products and installation services is essential for several reasons:
Safety First
Properly designed and installed fire-rated ducts save lives by containing fire and smoke, allowing
occupants more time to evacuate safely. In addition, they help protect critical infrastructure and
minimise the spread of toxic gases, reducing the overall impact of a fire. Ensuring correct installation
means fire-rated systems perform as intended when it matters most.
Regulatory Compliance
Non-compliance can result in legal ramifications, fines, and potential project delays. Professional fire-
rated ducting ensures all relevant standards are met. Certified products and expert installation
provide verifiable proof for building inspectors, giving specifiers and contractors confidence that their
projects adhere to UK fire safety regulations.
Long-Term Performance
Substandard ducting may fail under fire conditions, compromising building safety. Professional
products, such as Firemac FM Fire Duct systems, are tested for longevity and effectiveness. This
ensures that even years after installation, the ductwork will maintain its fire resistance, protecting
both property and occupants over the building’s lifetime.
Risk Mitigation
High-quality fire-rated ducting reduces the risk of structural damage, business disruption, and
insurance claims in the event of a fire. By investing in professional systems, companies also minimise
the likelihood of costly repairs or retrofits following failed inspections or fire incidents. Effective fire-
rated ducting forms an integral part of a wider risk management strategy.
Efficiency and Reliability
Professional ductwork minimises airflow resistance and maintains HVAC efficiency while providing
fire protection, ensuring building systems operate optimally. Correctly installed fire-rated ducts
prevent leaks and pressure losses that could compromise air circulation and energy efficiency. This
dual functionality helps buildings remain safe and operational under normal conditions and during
emergencies.
Peace of Mind
Engaging trusted providers like SEWS Ductwork guarantees expert advice, precise manufacturing,
and reliable installation, giving stakeholders confidence in the safety and performance of their
ductwork systems. Knowing that every duct meets rigorous testing and compliance standards allows
project managers to focus on other critical aspects of construction without compromising on fire
safety.
By prioritising professional fire-rated ducting, building owners and contractors ensure that their fire
safety strategy is robust, effective, and compliant. This approach not only protects people and
property but also safeguards reputations and long-term investments in the built environment.
How can SEWS Ductwork help?
SEWS Ductwork Services Ltd has been a trusted provider of high-quality ductwork solutions for over
two decades. Here’s how we can support your fire-rated ducting projects:
•Manufacture and Supply
Customised fire-rated ducts for 60, 120, and 240-minute fire ratings.
•Installation Services
Expert installation adhering to UK compliance standards and manufacturer guidelines.
•Firemac FM Fire Duct Systems
Access to market-leading fire protection products, tested and certified to BS476 and EN 1366
standards.
•Project Consultation
Guidance for specifiers and contractors to ensure the right products are chosen for each
project.
•Delivery to Site
Timely delivery across Essex and the wider UK to keep your projects on schedule.
With a commitment to quality, safety, and compliance, SEWS Ductwork is the ideal partner for your
fire-rated ducting needs. Contact us today to discuss your project requirements and get expert
advice from our experienced team.
FAQ: Fire-Rated Ducting
What is the purpose of fire-rated ducting?
Fire-rated ducting prevents the spread of fire and smoke, protecting occupants and building
infrastructure.
How long can fire-rated ducts resist fire?
Depending on the product, fire-rated ducts can resist fire for 60, 120, or 240 minutes.
What standards do fire-rated ducts comply with?
Common standards include BS476: Part 24 and EN 1366 Parts 1 & 8.
Can fire-rated ducting be customised?
Yes, ducts can be manufactured to specific sizes and shapes to fit building layouts.
What materials are used in fire-rated ducts?
Galvanised or stainless steel combined with fire-resistant insulation or fabrics, such as Firemac FM
Fabric PSA.
Is professional installation necessary?
Absolutely. Incorrect installation can compromise fire safety and regulatory compliance.
Can fire-rated ducts be used in kitchens?
Yes, they are suitable for kitchen extract systems, as well as ventilation, smoke extract, and
pressurisation.
How often should fire-rated ducting be inspected?
Regular inspection and maintenance are essential, usually annually or as part of the building’s fire
safety plan.
Does SEWS Ductwork provide installation services?
Yes, we manufacture, deliver, and install all fire-rated ducts to your specifications.
Why choose SEWS Ductwork?
We have over 20 years of experience, provide certified products, expert installation, and full
compliance with UK fire safety standards.
In Conclusion: Prioritising Safety, Compliance, and Quality
Choosing the right fire-rated ducting is not just about meeting regulations – it’s about protecting
lives, property, and your reputation as a specifier or contractor. From understanding fire resistance
ratings to ensuring professional installation and ongoing maintenance, every decision matters.
SEWS Ductwork is your trusted partner in fire-rated ducting, offering high-quality products, bespoke
solutions, and expert installation across Essex and the UK. Safeguard your building and your
occupants with fire-rated ducting solutions you can rely on. Contact us today to discuss your project
requirements and ensure your fire-rated ducting is safe, compliant, and effective.
