Linear Gap Seals & Air Sealing

Whether you're working on new builds, refurbishments, or post-inspection remedial works, we provide certified, fully compliant linear gap sealing solutions tailored to your building's needs.

What Are Linear Gap Seals?

Linear Gap Seals are fire-resistant materials used to fill linear joints between different elements of construction—typically between walls, floors, ceilings, or around building movement joints. These gaps, if left untreated, can act as unseen channels for fire and smoke to spread.

They are typically used in:

Floor-to-wall and wall-to-wall junctions
Curtain wall interfaces
Structural expansion joints
Gaps caused by building movement or shrinkage

Why Are Linear Gap Seals Important?

Preserve fire compartmentation by sealing hidden voids
Reduce the spread of fire and smoke, especially in concealed spaces
Ensure compliance with the Regulatory Reform (Fire Safety) Order 2005 and Approved Document B
Meet design intent for fire resistance performance
Support acoustic and thermal performance in some cases

Poorly installed or missing linear gap seals are a frequent cause of non-compliance in fire risk assessments, leading to remediation costs and increased risk to life and property.

Who Needs This Service?

Main contractors and developers
Passive fire protection contractors
Facilities and building managers
Social landlords and housing associations
Fire safety consultants and responsible persons

Whether for a commercial office, residential tower, hospital, school, or warehouse—linear gap seals are a small detail that make a big impact on fire safety.

Why Choose HK Fire Ltd?

Third Party Certified Installers
Fully compliant with BS EN 1366-4 and Approved Document B
Photographic reporting and full traceability
Works integrated with wider fire-stopping and compartmentation solutions
Nationwide coverage and flexible scheduling
Fast, cost-effective, and non-intrusive service