Cavity Barriers & Curtains
Concealed voids within a building’s structure are one of the greatest risks to fire safety. Our specialist teams install certified cavity barriers and automatic fire curtains to prevent the “chimney effect,” ensuring fire and smoke cannot bypass your compartmentation.
Specialist Cavity Barrier Installation UK-Wide
In modern construction, the spaces behind façades, above suspended ceilings, and under raised floors can act as a secondary path for fire to spread rapidly. Prime Fire Protection Ltd provides high-performance cavity barrier and fire curtain solutions designed to seal these hidden voids. We provide a fully audited, BM TRADA-certified installation.
Operating UK-wide, we work with developers, facilities managers, and cladding contractors to ensure that every barrier is correctly positioned, securely fixed, and technically proven to perform in the event of an emergency.
Why Cavity Protection is Non-Negotiable
A building’s external envelope and internal voids are often the weakest links in a fire strategy. Without compliant cavity barriers, a fire can bypass fire-rated walls and floors entirely, spreading undetected through the building’s “skin” or ceiling voids. This phenomenon, known as the “chimney effect,” has been the primary cause of many large-scale building failures.
Under the Building Safety Act 2022 and Approved Document B, the installation of these barriers is a legal requirement for Higher-Risk Buildings (HRBs). Using a non-certified installer for concealed safety assets is a significant liability. Prime Fire Protection Ltd provides the verifiable evidence needed to prove these hidden systems are fit for purpose.
Our Specialist Cavity & Curtain Solutions
We provide a comprehensive range of passive fire solutions designed to seal the most complex building voids:
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Ventilated Cavity Barriers: Specifically designed for allowing necessary airflow while providing an intumescent “seal” in the event of a fire.
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Non-Ventilated Barriers: Vertical and horizontal barriers for masonry and timber-frame cavities that provide a permanent smoke, heat and fire seal.
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Fire Curtains: Fabric barriers that are installed mainly from the ceiling or horizontal structures, ideal for covering a vast open planned area.
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Smoke Curtains: Specialist barriers designed to channel or contain toxic smoke, protecting escape routes and allowing for safe evacuation.
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Floor & Ceiling Void Barriers: High-density mineral wool systems installed to maintain compartmentation between floors and through ceiling plenums.
Engineered for Performance: The Materials We Use
Cavity barriers must be able to withstand extreme heat while remaining flexible enough to account for building movement. We only utilise third-party certified, UK-tested products.
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Intumescent Rainscreen Barriers: Specialist strips that expand rapidly when exposed to heat, closing the ventilation gap in seconds.
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High-Density Mineral Wool: The core material for most non-ventilated barriers, providing excellent thermal and fire resistance.
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Fire-Rated Fabrics: Used in automatic curtains, these advanced textiles can withstand temperatures exceeding 1000°C.
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Galvanised Steel Fixings: Ensuring that barriers remain securely attached to the structure even under intense heat and pressure.
The Prime Difference: A Digital Platform of Evidence
Because cavity barriers are often hidden behind cladding or ceilings, proving they have been installed correctly is vital. Every barrier installed by Prime is digitally logged using Onetrace/V-LAP technology to protect the “Golden Thread” of your building’s safety information.
Your Digital Compliance Folder Includes:
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Unique ID Tagging: Every barrier run is numbered, mapped, and physically tagged.
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Photographic Verification: High-resolution “Before, During, and After” photographs showing the fixings and seals before they are concealed.
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GPS & Time-Stamping: Absolute proof of exactly where and when the installation was completed.
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Material Traceability: Documentation of the exact product used, linked to manufacturer test evidence.
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BM TRADA Q-Mark Labelling: Every installation is physically marked with a BM TRADA-certified label, providing an immediate record of compliance.
Sector-Specific Expertise
Tailored Cavity Barrier Installation for Complex Environments
Prime Fire Protection Ltd operates UK-wide, providing specialist compartmentation for high-stakes sectors. Our teams are trained to work within the specific regulatory frameworks of each industry, ensuring that safety never compromises operational continuity.
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Healthcare & NHS Trusts
Specialist Protection for Sensitive Environments
Working within live hospital wards requires more than just technical skill; it requires a commitment to patient safety. We specialise in installing cavity barriers above suspended ceilings in live wards, utilising strict dust suppression and Infection Prevention & Control techniques (IP&Cs) to ensure fire-stopping is completed without disrupting critical care.
Key Focus: Sterile environment compliance and “Right First Time” installation in complex service voids.
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Commercial Offices
Meeting Higher-Risk Building (HRB) Standards
For corporate buildings and business parks, the Building Safety Act 2022 demands absolute precision. We provide the rigorous testing and digital GPS-tagging of automatic fire curtains and rainscreen cavity barriers necessary to meet the stringent requirements of the Building Safety Regulator.
Key Focus: Façade integrity and multi-storey compartmentation.
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Education
Ensuring Occupant Safety in High-Occupancy Settings
From student accommodation to large university lecture halls, we deliver cavity barrier solutions that protect sleeping and learning spaces. We schedule works during rapid-turnaround holiday programmes to ensure building-wide protection is achieved before the term begins.
Key Focus: Rapid deployment and non-disruptive scheduling for student housing.
Common Cavity Barrier & Fire Curtain FAQs
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What is the difference between a cavity barrier and a fire stop?
A cavity barrier is used specifically to close a “concealed space” (like the gap behind a cladding system or above a ceiling) to prevent fire from spreading. A fire stop is used to seal a “penetration” where services (like pipes or cables) pass through a fire-rated wall or floor. Both are essential for compartmentation.
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Why do I need a “ventilated” cavity barrier?
In rainscreen cladding, a gap is needed for moisture to escape and air to circulate. A ventilated cavity barrier has an intumescent strip that stays open during normal conditions but expands to seal the gap completely if it detects heat from a fire, preventing the chimney effect.
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How do automatic fire curtains work?
Fire curtains are stored in a compact headbox within the ceiling. When the building’s fire alarm system is triggered, they deploy via gravity-fail-safe technology, creating a physical fire barrier that allows for large open-plan designs without compromising safety.
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Who is responsible for checking these hidden barriers?
Under the Building Safety Act 2022, the “Responsible Person” must ensure all fire safety measures are adequate. Because these barriers are concealed, you must have a digital record (The Golden Thread) to prove they were installed correctly before the building was finished or handed over.
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Can fire curtains replace fire doors?
In many cases, yes. Fire curtains are often used where a traditional fire door is not aesthetically or operationally feasible, such as in large atriums or lift lobbies, provided they meet the building’s specific fire strategy and evacuation plans.
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Do you provide certification for insurance purposes?
Yes. Prime Fire Protection Ltd provides full digital certification for every installation. This auditable trail is essential for satisfying insurers, local authorities, and the Building Safety Regulator (BSR).
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Do you work in “live” environments like hospitals?
Yes. We are experts at working in sensitive settings. We utilise strict dust suppression and noise control, and all our operatives are DBS-checked and vetted to a high standard for your peace of mind.
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Is Prime Fire Protection Ltd a UK-wide service?
Yes. While we operate with local expertise, our teams deliver specialist cavity barrier and fire curtain installation services to commercial, residential, and industrial clients UK-wide.
Secure Your Building’s Compliance Today
Whether you are managing a live hospital ward, a high-rise residential block, or a nationwide commercial portfolio, Prime Fire Protection Ltd provides the Verifiable Safety you need.
Don’t leave your compartmentation to chance. Contact our technical team today for a comprehensive site survey or to discuss your cavity barrier and fire curtain requirements.
Other Passive Fire Protection Services
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Fire Stopping
Fire Stopping
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Fire Door Installation
Fire Door Installation
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Bespoke Solutions
Bespoke Solutions
Book Your Free Survey Today
Secure your building’s compliance with a professional audit. Don’t leave your fire safety to chance; our specialist team provides no-obligation site surveys for businesses across the UK.
We identify hidden risks, ensure you meet the latest UK regulations, and help you establish a robust “Golden Thread” of safety information. Partner with the passive fire protection specialists at Prime Fire Protection Ltd to ensure your assets are protected and fully certified. (Subject to T&Cs)
