Penetrations and linear gaps are the hidden weak points in fire safety. We make them reliable by using certified products from leading manufacturers and ensuring every seal is installed, recorded and signed off for compliance.
Our experience spans data centres, healthcare, education, residential and commercial builds, where sequencing, documentation and assurance matter as much as installation quality.
We work directly with main contractors and duty-holders to deliver clear traceability and zero-compromise compliance on every project.
What sets us apart:
– Fully LPCB-accredited installation teams
– Manufacturer-approved systems and documented QA
– Coordination with other trades to minimise rework or delay
– Real-time photo evidence and digital Golden Thread records
Please feel free to get in contact with us through our form, or the below details.
Middlesex Limited
Darwin House
Bourne End Business Park
Cores End Road
Bourne End, SL8 5AS
Penetration seals and cavity barriers are firestopping systems that maintain compartmentation by preventing fire, smoke and gases from passing through openings created by pipes, cables and structural joints. They are essential for compliance with Building Regulations Approved Document B and BS EN 1366 standards.
Without effective seals, fire can spread rapidly through service openings and linear gaps. Installing certified firestopping systems ensures that compartment walls and floors perform as designed during a fire, which is a key part of passive fire protection compliance.
Yes. We only install systems tested to BS 476 and EN 1366 standards, using manufacturer-approved materials such as Rockwool, Hilti and Nullifire. Every installation is traceable and recorded within our QA system.
Absolutely. Our teams are experienced in coordinating with other trades, allowing firestopping works to progress safely and efficiently during live build or refurbishment phases without causing delays.
Each project includes a full digital record of works: photographic evidence, material batch numbers and QA sign-off. This documentation supports Golden Thread compliance and simplifies future audits or fire risk assessments.
Yes. We deliver firestopping services across the UK for Tier 1 and Tier 2 main contractors, housing associations, facilities managers and building owners.
