YES. Not all lightweight insulating concrete systems require a slotted metal roof deck. BOAF (Building Officials Association of Florida) interpretation of the FBC is that lightweight insulating concrete can be installed over a non-slotted steel deck, provided proper venting is achieved as required by the manufacturer’s product approval. In all cases the metal roof deck must be galvanized. As with all roof insulation systems, the specifier should refer to the product manufacturers and their State Product Approval.
