Fire-Rated Roof Cavity Closers – Loft Space Upgrade
Project overview
During a site inspection of an existing residential property, gaps were identified at the junction between the masonry party wall and the pitched roof structure within the loft space. These voids presented a clear risk of fire and smoke spread through the roof cavity, compromising compartmentation.
The risk
Roof voids are a well-known but often overlooked route for fire spread. In this case, the absence of effective cavity barriers meant that, in the event of a fire, flames and smoke could bypass the masonry wall and rapidly travel into adjoining areas via the roof structure.
The solution
We installed a fire-rated roof cavity closer, carefully cut and formed to follow the roof pitch and tightly sealed against both masonry and timber elements. Particular attention was paid to detailing around rafters and junctions to ensure continuity of fire protection.
The installation restores the fire integrity of the compartment line while allowing the roof structure to remain ventilated where required.
Outcome
✔️ Fire and smoke spread risk significantly reduced
✔️ Compartmentation reinstated at roof level
✔️ Installation aligned with fire stopping best practice
✔️ Improved compliance and life safety provision
Conclusion
This project highlights how critical correct fire stopping is in roof spaces — especially in existing buildings where original construction may not meet current standards. Addressing these details early helps avoid costly remedial works and, more importantly, protects lives.
