Yes—but the answer cannot come from a shingle rating alone.
A dome is a specialty surface. As the courses climb, the circumference gets smaller, and the Diamond shingles are sized to follow it. The crown, base, ribs, and transitions each introduce their own details. In a hurricane zone, those details have to be considered with the structure, substrate, attachment, and local wind requirements as one project.
Spengler Industries fabricates custom domes and interlocking metal Diamond shingles. We also have a Miami-Dade NOA-approved Diamond shingle system in a specified painted Galvalume configuration, using concealed continuous clips. That is useful tested performance to bring to a high-wind project. It does not mean that every smaller, custom-sized dome shingle—or the entire dome assembly—automatically falls under the same approval.
Why the shingle size changes
A flat roof can use a repeating field shingle. A dome cannot simply carry the same layout to the top: each rising course circles a smaller area. To maintain the pattern and the interlocking system, the shingle dimensions and details must be worked out for the built geometry. Spengler explains the measuring and sizing process in its guide to Diamond shingles on a dome.
That is the design opportunity and the approval question in the same breath. A tested standard shingle and clip provide relevant information. The project team must still establish how its particular dome, including the smaller shingles and their attachment, meets the requirements that apply at that site.
The route through review
We would bring the proposed assembly and available test information to the architect, engineer, and local authority having jurisdiction early. They can determine what project-specific documentation and review are required for the specialty surface. In Florida, local officials may consider modifications or alternate methods when sufficient evidence of compliance is provided; that is a review process, not a promise of approval. Florida Building Commission material discusses local review of modifications to approved products.
The jurisdiction and the building design matter. A dome in Miami-Dade, a coastal project elsewhere in Florida, and a project on another hurricane-exposed coast may have different permitting paths. We do not ask an owner to assume that a product approval transfers unchanged to a new geometry.
More than a pretty skin
Wind loads have to travel from the exterior metal through clips and fasteners into the substrate and supporting structure. At the base and crown, the usual field pattern changes. Ribs, caps, penetrations, and the connection to the building need deliberate detailing. The responsible design professionals must evaluate the complete load path and weathering strategy for the actual project.
This is the kind of work we like. Our shop can develop a dome’s structure and cladding together, and our custom fabrication work has included projects for Disney and Universal. That experience speaks to our ability to coordinate unusual architectural shapes; it is not a code approval for a new dome.
For a look at our fabrication process, see the Nevada Legislative Building dome from model through shop assembly. It is a demonstration of dome-building capability, not a hurricane-rated project example.
Bring us the difficult dome
If your church, civic building, resort, or restoration project needs a metal dome in a hurricane zone, involve us while the geometry and approval path can still be shaped. We can discuss the design, the proposed material and clip system, and the documentation the project team will need to take to its reviewers. Contact Spengler Industries or call 801-462-5264.