Damp air, first and always
Ask anyone who has lived through a Florida August what the air feels like and the answer is the same: heavy. NOAA puts numbers on that feeling at its Vero Beach station, roughly 11 miles south of Sebastian. In an average year there, the wet-bulb temperature sits above 73°F for about 3,067 hours and above 67°F for about 5,428 hours. Wet-bulb readings track how much water the air is carrying, and those totals mark a climate where moisture is present for most of the year. They come from Vero Beach, not from a gauge in Sebastian, but they describe the coastal air that both places share.
For a house, that means the moisture side of the mold problem never takes a season off. Spores are already everywhere, indoors and out. Warmth and something to eat, such as drywall facing, wood trim, cardboard or household dust, are always on hand. Water is the one ingredient you can control, which is why every sound remediation plan starts with drying and stopping the source before anyone scrubs or cuts a single wall.
Why moisture control comes ahead of cleanup
Cleaning mold off a surface that is still wet buys a few weeks at most. The growth comes back because the conditions that fed it never changed. So the order of work matters:
1. Find where the water is coming from. 2. Stop it, whether that takes a roofer, a plumber, a window installer or an HVAC technician. 3. Dry the structure and confirm it is dry with moisture readings. 4. Only then remove or clean what grew.
A remediation company that wants to start tearing out material before it can tell you what caused the moisture is skipping the step that decides whether the job lasts.
Where the water usually comes from
In a humid coastal house, the sources tend to be ordinary rather than dramatic:
- Air conditioning. The system is the main dehumidifier in a Florida home. A unit sized too large cools the rooms quickly and shuts off before it has pulled much water from the air. A clogged condensate line or a rusted drain pan can spill into a ceiling or closet without anyone noticing.
- Ducts and air handlers. Cold supply ducts running through a hot attic can sweat, and the drip lands on insulation and drywall below.
- Plumbing. Slow leaks under sinks, at toilet bases, behind the refrigerator and at the water heater are easy to miss for months.
- Windows and sliders. Wind-driven rain finds worn seals and cracked caulk, and the water runs down inside the wall.
- A house left closed. Seasonal homes, or any house shut up with the air conditioning off, can let indoor humidity climb until mold shows up on furniture, closet walls and the backs of cabinets.
Florida's split between assessing and remediating
Florida draws a line between the company that diagnoses a mold problem and the company that cleans it up. Here is how the rule reads: the Florida Department of Business and Professional Regulation licenses mold remediators who pass the licensing exam and have documented training in water, mold and respiratory protection. A mold remediator may not perform a mold assessment on a structure its company remediated within the previous 12 months, and a mold assessor may not remediate a structure it assessed in that period, with an exception for certain Division I contractors.
What that means for you as a homeowner:
- Expect the assessment and the cleanup to come from separate firms in most cases.
- Ask every company which role it is playing on your house.
- Before signing anything, look the company up on DBPR's license search at myfloridalicense.com and check that the license type matches the work.
A note on the lagoon
Off Sebastian, in the Indian River Lagoon, lies Pelican Island. On March 14, 1903, President Theodore Roosevelt made that island the first federal bird reservation, and the National Wildlife Refuge System grew from it. The water and the birds are much of the draw. Living beside open water is also a fine reason to keep a hygrometer in the house and an eye on indoor humidity.
Signs worth a closer look
- a musty odor that returns after you clean;
- dark spotting on closet walls, ceilings near vents, or window corners;
- paint that bubbles, peels or stains;
- warped baseboards or a soft spot in drywall;
- condensation dripping from supply registers.
Protecting yourself during small checks
If you are looking behind a cabinet or lifting a corner of carpet, wear gloves, eye protection and a well-fitting disposable respirator, and keep other people and pets out of the room. Avoid dry brushing or running a fan across visible growth, which can scatter spores into the rest of the house.
Questions to put to a remediation company
- What caused the moisture, and who will fix it before cleanup starts?
- Who performed the assessment, and is your company separate from that firm?
- How will you seal off the work area, and will you run filtered negative air?
- Which materials will be removed, and which can be cleaned in place?
- What moisture readings will show the framing is dry before walls are closed?
- What will the final report include?
Paperwork before work begins
Get the scope in writing: rooms, materials, containment, drying targets and how completion will be shown. Compare quotes against the same scope. If you plan to file a claim, call your insurer early, read your policy's mold terms, and keep photos, reports and invoices together.