The water history a Margate sample is read against
Ordinary central Broward conditions: no coast, no salt, a flat site and a shallow water table under the whole town. What distinguishes Margate on the water side is roof age rather than anything geographic. A 1978 house is on its second or third roof covering, and each replacement is a moment at which the interface between roof and wall, or roof and vent penetration, was either detailed properly or was not. Those details fail quietly, decades later, into a ceiling assembly.
That context is why the outdoor control sample is not optional here. A laboratory can tell you that a cubic metre of your air held a particular number of spores, and on its own that number is unusable, because outdoor air across Broward carries a heavy background load in every month of the year and a building is mostly breathing it.
So every job in Margate starts with a cassette run in the outdoor air at the property, in the same hour, before any indoor sample is taken. Two things come out of the comparison. Count, where indoor air substantially above the outdoor air it is drawn from points at an indoor source. And species mix, which is usually the more useful of the two: when an indoor sample carries a genus the outdoor control barely registers, that difference is the finding even if the totals look ordinary.
Two limits go in the report rather than being left for you to discover. Sampling is a snapshot of one hour on one day, and a cooling system that has just cycled reads differently from one that has been off. And there is no federal or Florida numerical standard for indoor mold, so no laboratory can issue a pass or a fail. Anyone quoting a legal limit is quoting their own policy.
The commercial position in Margate is the one published on every page of this site, because the rate card is not a Fort Lauderdale rate card. A flat price by property size, agreed before anyone drives out, with the accredited laboratory fee already inside it. It does not rise if the samples come back positive, nothing is added for the drive, and we take no payment of any kind from anyone who removes mold.

What Margate itself changes
The buildings in Margate
Margate is a town of long-tenure owners in original houses: 77% owner-occupied across 26,356 units at a 1978 median, with 44% single-family detached. That combination produces a distinctive pattern. Where a rental market churns and forces periodic refurbishment, an owner-occupied 1970s house gets maintained rather than renewed, and maintenance concentrates on the things that stop working. Air conditioning stops working, so it gets replaced. Ductwork does not stop working in any way anybody notices, so it is still the original.
Where it hides in these buildings
Single-storey slab houses with attic air handlers, so the two places worth reaching are the attic and behind the fitted furniture at exterior wall bases. In a house where the same family has been for thirty years, the second of those matters more than usual: furniture has not moved in a long time, and the surface behind a wardrobe that has stood against an exterior wall since the 1990s is the least ventilated surface in the building.
The cooling systems here
The original duct system is the thing to examine in Margate. Fibrous duct board and flexible duct of the 1970s were made to a specification that assumed a service life shorter than the one they have had, and in a vented attic at Florida temperatures the insulation degrades, the vapour barrier splits and the inner liner absorbs. Where that liner has been wetted, it cannot be cleaned: the moisture is inside the material. That is a replacement rather than a cleaning, and a cleaning quote for it is money spent on the wrong job.