A first for recessed cassette façade systems
Bacacier’s Recessed Fix Cassette becomes the first product of its kind certified to FM 4411
In September 2026, Bacacier’s Recessed Fix Cassettes became the first product of their kind to earn certification to FM Approvals Examination Standard 4411 for Cavity Wall Systems. This marks an important milestone for recessed façade systems by providing building owners, designers, and other stakeholders with this certified solution backed by scientific research and real-world testing.
The availability of Bacacier Recessed Fix Cassettes, which are now listed in the Approval Guide, expands the range of evaluated exterior wall solutions available to architects, engineers, specifiers and building owners. Recessed cassette systems are commonly used to create clean, geometric façades, with concealed fastening and panelized construction providing greater architectural flexibility than traditional exposed-fastener cladding. With a product in this category now certified to FM 4411 (as a Class 1 cavity wall system), these design objectives can be considered alongside independently evaluated building-envelope performance.
Importantly, the FM Approval applies to a complete wall assembly rather than simply the exterior cassette panel. The Approved configuration consists of 3 mm aluminum cassette panels installed over noncombustible insulation, with a ventilated cavity ranging from 33 to 100 mm. The system's framing, anchors, fasteners, and attachment requirements are also specified as part of the Approved assembly. The FM Approved system carries no height restriction for fire and has achieved a Severe Hail (SH) rating and a +60/-60 wind pressure rating, providing specifiers with established performance parameters when considering this type of façade for a project.
As Jessica Waters, V.P. Hazards Manager – Climate & Structural Resilience at FM, explains, “This milestone brings together resilience and design. By expanding the range of FM Approved façade solutions, we’re helping property owners prevent loss and protect what matters most without compromising their design goals.”
For the broader building-envelope market, the significance is the addition of another architectural cladding category to the range of FM Approved solutions. Recessed cassette façades can be used on commercial, mixed-use, and other design-focused buildings where exterior appearance must be balanced with resilience and loss prevention considerations.
Backed by more than 140 years of property loss prevention experience, scientific research, testing and certification, FM Approvals evaluates building envelope systems for performance under challenging conditions presented by natural hazards and other exposures. Whether you manufacture exterior wall systems or specify and use them in your facilities, reach out to Frederick Kravetz (FM Approvals, Senior Business Development Engineer) at [email protected] or Joanna Blaney (FM Approvals, Technical Team Manager, Building Materials) at [email protected] to learn more about FM 4411 or other FM Approvals testing and certification programs.