The New River corridor and streets such as Sailboat Bend, Colee Hammock, and Victoria Park still hold bungalows and revival houses whose chimneys were built as masonry, not as a sided box. Those stacks sit close to canals, so the lower brick can stay damp even when the crown looks dry from the street. Open joints there are a masonry question. A rusted lid two blocks away on a later house is not.
Along the Intracoastal and on taller buildings near Las Olas, many fireplaces vent through a framed rooftop chase. Access can involve a shared roof, a locked stair, or a cover that sits next to other penetrations. Water that shows in a living room may have traveled from a seam the occupant cannot see. The useful request names the assembly at that roof, not a guess based on the stain.
West of the older river neighborhoods, later construction more often uses factory-built fireplaces. Those systems follow listed parts. Mixing a masonry crown conversation with a chase-cover request wastes the visit. Name the exterior and the fuel when you write. That is enough to start the estimate visit.