FIRAS & BM Trada Accredited

Fire Barriers

Cavity fire barriers, ceiling void barriers and concealed-space fire barriers, installed and evidenced to keep fire and smoke from running unchecked through your building.
We help contractors, developers and building owners close off the hidden routes that fires love - ceiling voids, raised floors, service risers and external cavities.

Talk to a Fire Stopping Expert

Our expert advisors are on hand to answer your questions and discuss your requirements.
Request Callback (Single-Col)
info@midsummerfirepro.co.uk · Free quote · Response within 24hrs
FIRAS & BMTRADA Certified | Nationwide | 1,000+ Sites
Certified installers
Commercial and residential projects
Fire doors and compartmentation
Photo evidence and reporting
Remedial works available
The Risks

Missing fire barriers let fire travel out of sight

Hidden fire and smoke spread

Without barriers, ceiling voids, raised floors and cavities act as motorways for fire and smoke between compartments and floors.

Compartmentation undone

A fire-rated wall is meaningless if the ceiling void above it is wide open. Missing barriers quietly defeat the strategy on paper.

Survey findings without action

Fire risk assessments routinely flag missing or damaged cavity barriers. Left unactioned, the responsible person carries the liability.
What we do

Fire barrier installation across every every concealed space

Cavity barrier installation

Mineral wool and intumescent cavity barriers in walls, ceilings and floors.

Ceiling void barriers

Suspended ceiling void barriers tied into compartment walls above the grid.

Raised access floor barriers

Underfloor cavity barriers across data centres, offices and plant areas.

External facade cavity barriers

Open and closed-state cavity barriers within rainscreen and ventilated facades.

Service riser barriers

Horizontal barriers between floors in vertical service shafts.

Surveys and remedial works

Identification of missing or failed barriers and full remedial installation.
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Why It Matters

Fire barriers are the part of compartmentation nobody sees

Most fire spread that catches buildings out happens above ceilings, behind walls and inside facades. Cavity fire barriers close those routes off so fire stays in the compartment it started in - long enough to evacuate and fight it.
Stops fire spread through ceiling voids
Maintains horizontal compartmentation
Protects vertical risers and service shafts
Closes off cavities in external facades
Supports Building Safety Act compliance
Provides evidence for surveys
WHO WE HELP

Fire barrier specialists working with the people who carry the risk

Contractors

Cavity barrier installation packages on new build, refurb and facade projects.

Developers and housebuilders

Compliant cavity barriers across residential, mixed-use and high-rise schemes.

Housing associations

Remedial cavity barrier programmes across blocks following EWS and FRAEW reviews.

Facilities and estates teams

Closing off ceiling void and riser gaps flagged in fire risk assessments.

Industrial and commercial sites

Cavity barriers across warehouses, offices, schools and healthcare buildings.

Facade contractors

Open and closed-state cavity barriers behind rainscreen cladding systems.
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Our Process

How We Deliver

A structured, transparent process from first enquiry to project completion. Every stage is documented and communicated clearly.
01

Enquiry & Review

We review your scope, specification, drawings and programme requirements.

02

Survey & Scope

Detailed site survey to define scope, access, phasing and methodology.

03

Installation

FIRAS-certified operatives deliver works safely and to programme.

04

Handover

Full O&M packs, certificates, photographic records and completion sign-off.

UK Fire Stopping Contractor

Nationwide UK Passive Fire Protection Company

Midsummer Fire Protection has established a reputation as a leading passive fire protection company across the UK. Offering our passive fire protection solutions nationwide.

Our head office is based in Kettering, with strategic locations in:
London, Birmingham, Liverpool, and Leeds, meaning we can cover vast areas of the UK, within an hour or two from one of our offices.

Five hubs across England & Wales. Same-day response, FIRAS-certified installers.

Postcode or town name — we'll route you to the closest team.

Cavity Barrier COmpliance

Cavity barriers installed to standards that pass scrutiny

Cavity barriers are scrutinised harder than ever post-Grenfell, particularly in residential and high-rise. We install only third-party tested products, fitted to the tested detail, and we evidence every barrier as it goes in.
Approved Document B
BS 8414 / BR 135
Building Safety Act 2022
Tested cavity barrier systems
FIRAS certification
Golden Thread records
Frequently ASked

Fire Barrier FAQs

What is a cavity fire barrier?
A cavity fire barrier is a fire-resistant material installed within a concealed space — such as a ceiling void, wall cavity or facade cavity — to stop fire and smoke spreading along that hidden route between compartments.
Where are cavity barriers required?
They're required wherever a concealed space crosses a compartment line and at maximum permitted distances within cavities. Common locations include above suspended ceilings, in service risers, behind external cladding and within raised floors.
How do I know if my building has them?
A concealed space survey will confirm. We open up access panels and inspect ceiling voids, risers and cavities to identify whether barriers are present, correctly installed and intact.
What standards apply to cavity barriers?
Approved Document B sets out the requirements, with BS 8414 and BR 135 relevant for external walls. Tested cavity barrier systems must be installed to the manufacturer's tested detail.
Can damaged barriers be repaired?
Yes. We carry out remedial works to repair damaged barriers, replace incorrect products and close off gaps left by MEP installations or alterations.
Are barriers required behind external cladding?
Yes — both horizontal and vertical cavity barriers are required within ventilated and rainscreen facades to close off the cavity at compartment lines and at defined maximum distances.
Do you provide barrier evidence for EWS1 or FRAEW?
Yes. We provide photographic evidence, product details and installation records suitable for inclusion in EWS1, FRAEW and Building Safety Case submissions.
Are your barrier installers certified?
Yes. Our installers are FIRAS third-party certified and trained on the tested systems we install.
What we fix

Cavity barrier problems we're called in to put right

These are the failures we find on almost every survey. They're invisible until something goes wrong, which is exactly why they get missed.
No cavity barriers above suspended ceilings
Gaps between barriers and structure
Damaged barriers from MEP works
Wrong product for the cavity width
Cavity barriers omitted at compartment lines
Open service risers between floors
Missing barriers behind cladding
Insulation used in place of tested barriers
Get Started

Let's Discuss Your Fire Stopping Requirements

For enquiries, tenders or questions, please call our Head Office on 01536 211999 or contact our team via the enquiry form.

Why Choose Midsummer Fire Protection?

Friendly and professional
Accurate & expert guidance
No obligation quotes
Effective and trusted solutions
“A company renowned for workmanship, professionalism, and high quality. We aspire to exceed your expectations, on time, in time, every time”

Don’t Leave Your Fire Safety to Chance. Tell Us How We Can Help.

Our expert team are on hand to answer your questions or arrange a quotation for your requirements.
Enquiry Section (Single Col)
info@midsummerfirepro.co.uk · Free quote · Response within 24hrs
FIRAS & BMTRADA Certified | Nationwide | 1,000+ Sites
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