Primer vs Bare Finish on Type B Metal Decking in Florida
In Florida, "bare" Type B deck almost always means galvanized deck with no paint, and it outlasts primer-painted deck in humid or coastal conditions. Painted deck suits dry, conditioned interiors and gives a more uniform look. Uncoated black steel deck is not a catalog option. We supply galvanized G60 or G90, or painted.
How they compare
- Galvanized, unpainted: zinc protects sacrificially, including at scratches and cut edges. Has a mill spangle appearance. Best choice for corrosion life.
- Painted (primer): uniform color, but the coat is a provisional barrier. Good in dry, enclosed spaces, and weaker where moisture or condensation shows up.
- Underside appearance: if the ceiling stays exposed, either one can take a field topcoat over a compatible primer.
Which one fits your building
Choose galvanized for coastal sites, unconditioned or humid spaces and wet-fill roofs. Painted deck is reasonable for an interior with a dropped ceiling or a conditioned space where the deck will be finished. Confirm with your specification, since the architect sets the finish.
Send the deck section of your specification with the plans, and we will quote 1.5" Type B, 22 to 16 gauge, in the finish called for.
Related Questions
What is the painted option applied over?
The catalog lists galvanized G60 or G90 steel with a painted option. Paint systems and substrates vary by order, so if your specification requires a particular primer, color or substrate, include it in the quote request. We will confirm what is being supplied before release.
Is weld burn a concern on painted deck?
Arc spot welds burn off coating on either finish. The specification usually requires touch-up of weld areas on exposed deck. Some projects use mechanical fasteners instead, as the engineer of record allows. Tek screws are available from us for sidelaps.