To prepare your home for a mold inspection, clear access to the air handler closet, the attic hatch, the water heater, and the space under every sink, pull stored items a foot off the walls in closets and the garage, leave the air conditioning running normally, do not clean, paint, spray, or fog anything you suspect, and write down what you have noticed and when. Good preparation makes the inspection faster and the findings sharper. It never means hiding anything.
That last point is the one people get backwards. Some homeowners prepare for a mold inspection the way they prepare for a showing, and they scrub the bathroom ceiling, bleach the closet wall, and open every window the morning of. All of that destroys the evidence the inspector came to read. This note is the preparation we ask of clients across the Treasure Coast and Palm Beach County before we arrive, why each step matters, and the short list of things to leave exactly as they are.
What should you clear before a mold inspector arrives?
Clear a path to every place water is handled and every place an inspector has to physically get into, because anything that cannot be reached cannot be inspected, and the places that are hardest to reach are where the findings usually are.
The air handler closet comes first. In most Florida homes it is a narrow closet in a hallway or the garage, and it is frequently used for storage. Empty it enough that the cabinet door can be opened, the floor around the unit can be seen, and the drain line where it leaves the unit is visible. The floor of that closet, the base of the cabinet, and the wall behind it produce more findings in our inspections than any other single location, and a stack of boxes in front of them means an inspector is guessing.
The attic hatch is second. If it is in a closet, move the shelf contents and the clothes rod items beneath it. If it is in the garage, move the vehicle or the storage under it. An inspector needs to set a ladder and get through the opening safely, and a hatch that cannot be opened means the attic is not inspected, which in this market means sweating ducts and bathroom fans venting into insulation go unseen.
Under every sink, empty the cabinet. Kitchen, every bathroom, the laundry sink if there is one. The cabinet floor and the back wall are where slow drips from supply lines, drain traps, and dishwasher connections show themselves, and the white fuzz on a cabinet floor under a pile of cleaning supplies is one of the most common things we find.
The water heater needs a clear view of its base and the floor around it, and the washing machine needs enough clearance that the wall and floor behind it can be seen with a flashlight, or ideally that the machine can be pulled forward a few inches.
In closets on exterior walls, move the clothes to one side or pull the boxes a foot off the wall so the lower half of the wall and the corners are visible. These closets are the classic Florida mold complaint, because humid air meets a cool exterior wall with no airflow, and the growth is behind the hanging clothes.
In the garage, pull anything stored against the walls or sitting directly on the slab a foot away. Cardboard on a slab and against a block wall is where humidity problems show first.
You do not have to move furniture, but if there is a particular wall you are worried about and a large piece sits against it, moving it is worth the trouble. An inspector with a thermal camera can scan most of a wall above and around a sofa, but the base of an exterior wall behind a bed is where wicking shows, and it is worth seeing.
What should you leave exactly as it is?
Leave any suspected growth, any stain, any smell, and the air conditioning settings exactly as they are, because those are the things the inspector came to read.
Do not clean the growth. This is the single most important instruction and the one most often broken. A wall that has been wiped with bleach the morning of the inspection shows a faded stain and a chemical smell. A laboratory cannot identify a genus from a surface that has been scrubbed. A photograph of a cleaned wall proves nothing to a landlord, a seller, or an insurer. If you are a tenant or a buyer, this matters even more, because the documentation is the whole point. Clean it after it has been documented and after the cause has been addressed, and it will not come back.
Do not paint over stains, and if you already have, say so. Fresh paint over a moisture stain is one of the most common things we find in homes being sold and in rentals, and a moisture meter reads straight through it, so it does not hide anything from the inspection. What it does is remove the visual information about the stain's shape and age, and it makes the inspector wonder what else was painted.
Do not spray, fog, or run an ozone or air purifier treatment beforehand. These do not fix the moisture and they disturb the air right before any sampling would be taken, which biases the result.
Do not vacuum or sweep aggressively the morning of. Ordinary housekeeping is fine. Stirring up dust immediately before an air sample loads the cassette with debris and makes the count harder to read.
Do not open all the windows to air the house out. In coastal Florida, opening windows in the morning lets humid outdoor air into a conditioned house, raises the indoor humidity reading the inspector will take, and confuses the picture. It also flushes the odor that may be the most important clue. Keep the house closed and conditioned as you normally would.
Do not change the thermostat. If the fan is set to on rather than auto, leave it, because that setting may be part of the problem and the inspector should see it. If the house is normally kept at seventy eight, keep it at seventy eight. The inspection is a reading of how the house actually lives.
Why should the air conditioning stay on during a mold inspection?
Because the air conditioner is the humidity control for the house, its behavior is often the cause of the problem, and any air sample taken with the system off does not reflect the air anyone breathes.
An inspector wants to see the house operating as it normally does. That means the air handler running its normal cycles, the supply registers delivering air, the return pulling, and the condensate line draining. The indoor humidity reading taken during the visit is only meaningful if the system has been running normally for hours beforehand. If the system was off overnight and turned on when the inspector pulled up, the reading is meaningless and the house will feel and smell different than it does day to day. Our note on why AC oversizing makes Florida homes humid explains why the system's cycling behavior is itself one of the things being inspected.
If air sampling is warranted, the same logic applies more strongly. A spore trap sample captures the air in the room over about five minutes. With the system off, the air is still and the sample reflects that stillness. With the system running, the sample reflects what the ducts, the coil, and the returns are contributing, which is what the occupants actually breathe. The standard practice is to sample under normal operating conditions, and an inspector who tells you to turn the system off beforehand is not following it.
Do not, on the other hand, turn the system to a much lower setpoint to make the house feel fresh. That changes the humidity picture as well. Normal is the instruction.
What should you write down before the inspection?
Write down what you have noticed, where, when it started, when it is worst, and what has happened to the house, because that intake shapes where the inspector looks hardest and it is easy to forget details in the moment.
Start with the concern itself. What did you see or smell, in which room, on which wall or surface, and roughly when did you first notice it. Has it grown, changed, or come back after cleaning. Is there an odor, where is it strongest, and is it stronger at a particular time of day or when the air conditioning starts a cycle.
Then the history of the house. Any leaks, from the roof, plumbing, windows, or the air handler, and whether and by whom they were repaired. Any storm intrusion. Any flooding. Any previous mold remediation and who did it. Any insurance claims. When the roof was last replaced, if you know. When the air conditioning system was installed and last serviced, if you know. Whether the house has been vacant or closed up for long stretches.
Then the people. Whether anyone in the household is experiencing symptoms their physician associates with damp environments, and whether those symptoms track with being home. An assessor is not a medical provider and will not diagnose anything, but that pattern tells us where to look and whether sampling is likely to be warranted.
Then the readings, if you have any. If you have a hygrometer, note what it typically reads and where. If you have photographs of the growth or the stain from earlier, especially dated ones, have them ready. If you have a prior inspection report, a home inspection report, or a seller's disclosure, have it ready. Our note on what questions to ask your mold inspector has the questions to ask in return, and it is worth reading beforehand.
Send that intake ahead if you can. Sterling asks for it when the visit is booked, and it routinely changes how the visit is planned.
Should you be home for the mold inspection?
Yes, if at all possible, for the intake at the beginning and for the walkthrough at the end, because the narration during the visit is where you learn your own house.
A good inspector explains what is being seen as the visit goes. This wall is reading dry. This closet is cool because it shares a wall with the garage. This is the condensate line and this is where it should drain. The fan in this bathroom is not moving air. That running explanation is worth more to most homeowners than the report, because it turns a document into an understanding of how the house works and what to watch. If you cannot be present, arrange for someone who knows the house to be there, and ask for a phone call at the end of the visit.
For tenants, being present matters for a second reason. The inspector's account of what was observed is stronger when the tenant can confirm the conditions and the timeline, and a landlord who was not present cannot later claim the inspector was shown something misleading.
Pets should be secured in a room that has already been inspected or outside, mostly for their safety around ladders and open attic hatches. Children are welcome and often the most interested party in the thermal camera.
What to do next
The day before, walk the house with this list and clear what needs clearing. Write the intake and send it ahead. The morning of, do nothing unusual. Leave the air conditioning where it always is, leave the growth alone, leave the windows closed, and have the photographs and reports ready. Then be there for the beginning and the end.
Sterling's assessor has personally completed more than three hundred inspections since January 2026 across the Treasure Coast and Palm Beach County, and the ones that went best were the ones where the client had done exactly this. The process page shows the visit step by step, our overview of what a mold inspection includes in Florida describes the full scope, and you can request a quote and send your intake with it. If Sterling inspects your home, Florida law bars us from remediating it for twelve months, and we take no referral fees, so the only thing we are looking for when we arrive is the water.
Frequently asked questions
How do I prepare my house for a mold inspection?
Clear access to the air handler closet, the attic hatch, the water heater, the washing machine, and the space under every sink, and pull stored items a foot off the walls in closets and the garage. Leave the air conditioning running at its normal settings, keep the windows closed, and write down what you have noticed, where, and when, along with any leak or remediation history. Do not clean, paint, spray, or fog anything you suspect before it has been documented.
Should I clean mold before a mold inspection?
No. Cleaning, bleaching, or painting over suspected growth before an inspection destroys the evidence the inspector came to read. A scrubbed surface cannot be identified by a laboratory, a faded stain loses the shape and age information an assessor uses, and a photograph of a cleaned wall proves nothing to a landlord, seller, or insurer. Leave it as it is, have it documented, address the moisture cause, and then clean it.
Should the AC be on during a mold inspection?
Yes. The air conditioning should run at its normal settings before and during the inspection so that the indoor humidity reading reflects how the house actually lives and so that any air sample captures what the occupants breathe under normal conditions. Turning the system off, or turning it down sharply to freshen the house, changes the humidity picture and biases sampling. Leave the thermostat and the fan setting exactly as they normally are.
