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Cavity Fire Barriers

Preventing Hidden Fire Spread Within Buildings

Cavity fire barriers are essential for stopping the unseen spread of fire and smoke through concealed spaces within a building. Installed correctly, they help maintain compartmentation and prevent fire travelling through wall cavities, roof voids and floor voids. 

We provide professional cavity fire barrier installations for commercial, residential and mixed-use properties, delivering compliant fire protection solutions that are practical, reliable and cost-effective.

What Are Cavity Fire Barriers?

Cavity fire barriers are fire-resistant systems installed within concealed cavities to restrict the spread of fire and smoke. These areas are often hidden behind walls, ceilings and roofs, making them a high-risk pathway for rapid fire spread if left unprotected.

Cavity fire barriers help to:

  • Limit fire spread within cavities
  • Reduce smoke movement through hidden spaces
  • Protect escape routes and compartments
  • Support compliance with fire safety regulations

We install a range of tested cavity fire barrier systems, including:

  • Wall Cavity Barriers
    Installed within external and internal wall cavities to maintain compartmentation
  • Roof Void & Eaves Barriers
    Preventing fire and smoke spread through roof spaces and eaves
  • Floor Void Barriers
    Installed between storeys to reduce fire spread through concealed floor areas
  • Service Interface Sealing
    Ensuring cavity barriers are properly sealed around structural elements and services

All installations follow manufacturer guidance and recognised fire safety standards to ensure performance in the event of a fire.

Cavity fire barriers are commonly required in:

    • Apartment blocks & residential buildings
    • Care homes & supported living environments
    • Schools and education facilities
    • Commercial offices
    • Retail and hospitality premises
    • New build and refurbishment projects

They are often installed following fire risk assessments, building inspections or remedial works programmes.

Installed Correctly, Every Time

Incorrectly installed cavity fire barriers can compromise fire safety and lead to failed inspections. Gaps, poor fixing or incorrect materials can significantly reduce effectiveness.

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