Brick slip systems offer a combination of traditional brickwork appearance and modern façade construction efficiency. However, design variations in individual systems can make standard cavity fire barriers insufficient, highlighting the need for application-specific barriers.
These systems are commonly used in refurbishment projects and are increasingly adopted for mid- to high-rise new build projects to achieve traditional aesthetics compatible with modern construction methods and fire safety requirements.
Design Variations and Fire Protection Challenges
Mechanical-fix brick slip systems can differ widely in design, making standardized passive fire protection difficult. For example, some systems use a ‘clip in’ rail fix, while others use a ‘dovetail’ fix, presenting interfacing complexities.
The irregular cavity sizes within the void created by the brick tile profile can also pose challenges, especially when not using a flat-backed system. The cross-section of the tile may include a profile or ‘frog’, which can be difficult to seal effectively using conventional cavity barriers.
Bespoke Cavity Barrier Solutions
Due to the variations within brick slip systems, there is often insufficient evidence that standard cavity barrier solutions will provide the right performance and protection.
Passive fire protection for brick slip systems typically comprises horizontal partial fill ‘open state’ cavity barriers and vertical full fill barriers fixed to the inner construction. In a fire, the integral intumescent strip on the open state barrier activates and expands to meet and mold to the face of the external leaf.
Some passive fire manufacturers have developed effective bespoke barrier solutions for common brick slip system types, supported by primary test data and third-party certification. This allows architects and specifiers to better understand risk factors and gather sufficient evidence to demonstrate compliance with regulations.
Collaborative Approach to Fire Safety
Where test data may be lacking, some passive fire manufacturers can work collaboratively with project teams to engineer their cavity barriers and overcome fire safety challenges. This provides assurance that the cavity barriers will achieve a robust seal between the inner construction and outer brick slip.
Passive fire protection solutions tailored for brick slip façades can also carry practical benefits. For example, vertical cavity barriers with a lamella core can be installed under increased compression and detailed accurately around interfaces using basic tools.