Can I keep drywall that got wet and now looks normal?

Not if floodwater or sewage reached it. The Gypsum Association says gypsum board exposed to sewage or floodwater must be replaced. Clean supply-water damage is a different case, and only if the leak is stopped, the board dries within about 24 to 48 hours, and it is still sound.

Will bleach keep mold from coming back?

No. Bleach does not fix a wet wall. The EPA says killing mold is not enough, because dead mold can still cause reactions. The mold has to be removed, and the moisture has to be gone.

Can I put a fan on mold to dry it faster?

No. The EPA says to wait on fans until you have gently cleaned the mold you can see, so the fan does not spread it. Do not blow air across sewage or muddy floodwater.

The water only came up one foot. Can I replace just that strip of drywall?

Often you can replace only the lower part, but the cut should go above the waterline. Osceola County's building office tells flooded homeowners to remove drywall a foot above the waterline. A 12-inch waterline is a reason to look at about 24 inches, then go higher if the board, insulation, or framing is still wet.

Can I shampoo flooded carpet and keep it?

Not when the water came from outside. The pad, tack strips, and floor under the carpet hold contamination after the top feels dry. Remove the carpet, the pad, and the tack strips, then clean and dry the floor before anything new goes down.

Do I need a mold test before I start?

Not when you can already see the mold or the house stayed wet. The EPA says testing is usually unnecessary when mold is visible. Dry the house and remove what cannot be cleaned. A test kit is not a certificate that the house is safe.

Florida Flood Cleanup: Wet Drywall, Carpet, and Mold

This week in Florida

On November 4, 2026, Executive Order 26-228 expanded the state of emergency for the fall flooding. It covers Brevard, DeSoto, Glades, Hardee, Hendry, Highlands, Indian River, Lake, Martin, Okeechobee, Palm Beach, Seminole, St. Lucie, and Volusia counties. The first order, on November 2, covered seven of those counties. The newer order is the one to use.

The order says parts of Palm Beach County, including Riviera Beach, had more than 19 inches of rain in twelve hours, and that the National Weather Service expected minor to moderate flooding on the St. Johns River that could last several weeks.

This is a cleanup guide. It is not a shelter list, a road report, or an evacuation order. For current warnings, use FloridaDisaster.org, your county emergency office, and the National Weather Service.

The order of work: make it safe, photograph the damage, stop more water, remove what floodwater soaked, clean what you are keeping, dry it and check it, and only then close the walls and put flooring back.

Spraying a wet wall and covering it with new drywall is not mold cleanup. The EPA says moisture control is the key, and that mold on a porous material such as drywall or carpet often has to be thrown away.

First: know when not to go in

Stay out until local officials say the area is safe. Do not enter a house with a sagging ceiling or floor, a gas smell, downed power lines, or standing water that may still be live.

Electricity. Do not walk through water to reach a breaker panel. Shut power off only from a dry, safe place. If you cannot, wait for the utility or an electrician. Flood-damaged wiring needs a look before power comes back. Rubber boots do not make a live room safe.
Generators and gas pumps. The EPA flooded-home guide says a fuel-powered generator stays outdoors, at least 20 feet from the building, and must not exhaust into open doors or windows. Never run one in a garage, on a porch, or in any partly closed space. Carbon monoxide kills with a door open.
Who stays out of the work. Keep children, pets, and people who are not helping out of the rooms you are tearing out. People with asthma, allergies, or a weakened immune system should not do the mold work. The EPA notes that mold exposure can lead to infections in people whose immune systems are suppressed.

The first things to do, in order

Order	What to do
1. Make it safe	Deal with power, gas, structure, sewage, and chemicals before you start hauling.
2. Photograph it	Waterlines on the walls, floors, furniture, and the labels on appliances. Write down brands and serial numbers. Call your insurer.
3. Stop more water	Only when it is safe. Roof work and a house that is moving are jobs for people who do that work.
4. Get the water and the ruined materials out	Pump or wet-vac standing water from a safe, shallow depth. Then remove soaked carpet, pad, drywall, and insulation that cannot stay.
5. Clean before you run big fans	Get mud off. Do not aim a fan at sewage or at mold you can see.
6. Dry, measure, then repair	Leave the wall open. Run dehumidifiers. Check the wood before you close it.

Do not wait on the adjuster while sewage sits in the carpet

FEMA says to take photos, keep small samples of carpet, flooring, and drapes if you can, and then throw away items that are a health risk after floodwater. Do not keep a pile of filthy carpet in a bedroom so someone can see it later. Save receipts for cleanup and for fans or dehumidifiers you rent. Photos and receipts do not guarantee a payment. That depends on the policy.

Was it clean water or water from outside?

This decides what you can save.

Water	What it means
A fresh leak from a supply pipe	The EPA's drying table is for this kind of water. Drywall with no swelling and intact seams may dry in place. Carpet may be salvageable if you pull it and dry it within about 24 to 48 hours.
Street, canal, river, storm, or drain water	Treat it as dirty. The CDC says to remove drywall and insulation that floodwater or sewage reached. The Gypsum Association says board exposed to sewage or floodwater must be replaced.
You do not know, or you smell fuel or sewage	Stop. Household cleaner will not make fuel, chemicals, or heavy sewage safe. Get help.

The EPA's mold course says its drying guidelines were written for clean water, not floodwater, sewage, or other contaminated water. Clear water from the yard can still be contaminated. The EPA flood page says floodwater can carry bacteria and chemicals, and that mold can grow on wood, drywall, carpet, and furniture that stay wet more than 24 hours.

When this is no longer a do-it-yourself job

The EPA says a moldy area less than about 10 square feet, roughly a 3-by-3-foot patch, can often be cleaned by the person who lives there. A flood is different. The same page says to get the larger guide, or experienced help, when there has been a lot of water damage or the mold is bigger than that.

A one-foot-high band of mold around a 12-by-12-foot room is about 48 square feet before you subtract doors. A shallow flood can already be a bigger job than a small bathroom patch.

Get experienced help for sewage, a heating or cooling system that took on water, mold you cannot see, or a job you cannot keep separated from the rest of the house. Do not run an air conditioner or furnace if floodwater or mold may be in it. The EPA says that can spread mold through the building.

Florida licenses people who assess or clean up mold for pay when the work is covered by section 468.841, Florida Statutes. A homeowner assessing mold on their own house is exempt. That exemption does not make a large or contaminated cleanup safe, and it does not remove building-permit rules. If you hire someone, ask for the person's Department of Business and Professional Regulation license, insurance, and a written plan for what comes out and how they will know the wall is dry. Under section 468.8419, the person who assesses the mold generally cannot also be the person paid to remove it on that building for 12 months.

What to wear

For mold cleanup, the CDC says to wear at least a NIOSH-approved N95 respirator, gloves, and goggles that block splashes, not just eyeglasses. Add waterproof boots, long sleeves, and long pants. A long tear-out can call for a half-face or full-face respirator.

An N95 filters particles. It does not stop carbon monoxide, fuel vapors, or bleach fumes. A mask is not a reason to walk into a room with an unknown chemical smell.

If the house was built before 1978, paint may contain lead. Do not sand or dry-scrape it. Floor tile and old adhesives can contain asbestos. If you think those materials are there, stop and have them checked before you cut. The EPA's lead page is epa.gov/lead.

What to remove first

After photos and a safety check, take out the materials that hold dirty water and block the wall cavity.

Material	After outdoor floodwater
Carpet, pad, and tack strips	Remove them. The CDC lists carpet and carpet padding among items to throw away when you cannot clean and dry them quickly. Osceola County says to take carpet, padding, and carpet strips out of flooded areas.
Wet drywall	Remove it, higher than the waterline. Details are in the section below.
Fiberglass or cellulose insulation	Remove wet insulation. The CDC says to discard insulation that floodwater or sewage reached. Leaving it in the wall keeps the cavity wet.
Swollen particleboard or MDF trim and cabinets	These usually cannot be saved. Swelling does not reverse when the surface dries. Solid wood may be salvageable after it is cleaned and dried.
Mattresses, cushions, stuffed toys, pillows	The CDC says to throw away absorbent items you cannot clean and dry quickly.
Solid wood, metal, glass, hard plastic	Often salvageable after washing and drying. The CDC says to clean hard surfaces with hot water and laundry or dish detergent.
Appliances and outlets that got wet	Do not plug them in to see if they work. Have them checked first.

Bag or wrap moldy pieces before you carry them through clean rooms. Do not drag wet carpet across a dry floor, and do not stack wet drywall next to a bed. Follow your county's debris rules. Keep appliances, electronics, plants, and household hazardous waste in the piles the county asks for. Do not block drains, hydrants, or sidewalks.

Flooded carpet

Do not treat outdoor floodwater like a carpet-cleaning appointment. The backing, the pad, the tack strips, and the floor underneath can stay dirty after the top feels dry.

Osceola County's building office tells flooded homeowners to remove carpeting, padding, and carpet strips. Cut the carpet into pieces you can lift. Wet carpet is heavy, and tack strips are sharp. Bag it. Wash and dry the slab or wood floor before any new floor goes down.

A small, clean supply-line leak that you catch the same day is a different case. The EPA says carpet from clean water can sometimes be dried in place of the pad, with extraction, fans, and a dehumidifier, inside 24 to 48 hours. That does not apply to water that came through the yard or the street.

Do not lay new carpet on a damp pad, a damp slab, or a damp wood subfloor.

Only the bottom foot of drywall got wet

You can often replace only the lower part of the wall. The cut should not stop at the stain.

Drywall wicks water above the line you can see. The back of the board, the insulation, the baseboard, and the bottom plate of the wall can still be wet after the paint looks better.

The Gypsum Association says a panel exposed to sewage or floodwater must be replaced. Its document GA-231 says clean, uncontaminated water is a separate case: the leak has to be stopped, the board has to dry before mold starts (often 24 to 48 hours), and the board has to stay sound, with no rusted fasteners or paper that is coming apart. If you are unsure, the association says replace it.

A one-foot waterline, as an example. Osceola County says to take the baseboards off and remove drywall a foot above the waterline. If the water stopped at 12 inches, that county's guide points to a cut around 24 inches, not at the 12-inch stain. That is one Florida county's instruction, not a statewide law. Go higher wherever the board, the insulation, or the wood is still wet or dirty.

1. Take the baseboard off and look behind it

Pry off the wet baseboard, shoe molding, and any trim that covers the cut line. Watch for nails. Solid wood or plastic trim can sometimes be washed, dried, and reused. Swollen pressed-wood molding usually cannot. Mark the pieces you are keeping so they go back in the right room.

2. See how far the water really went

Look above the line, on the other side of the wall, behind cabinets, and inside closets. A moisture meter can show which spots are wetter than others. The Gypsum Association warns that a meter set up for wood does not give a true moisture percentage for gypsum board. Use it to compare areas, not as a pass-fail number on the drywall itself.

3. Mark a level line and cut only the board

With power off and the cavity understood, mark a level line above the damaged area. Use a shallow cut. Do not cut studs, pipes, wires, or metal plates. Stop if you do not know what is inside the wall. Pull the wet board and the wet insulation. Leave the cavity open. A few holes drilled in the board are not a substitute for taking the wet insulation out.

4. Look at what the wall was hiding

Check the bottom plate, the studs, the wiring, and the outlets the water reached. Wood that is still solid can be cleaned and dried. Wood that is soft, rotted, or badly swollen needs a carpenter or a building official before you rebuild. Taking the drywall off is not permission to cut a stud that holds the house up.

Block walls can hold water behind the finish. Open the wet finish so the block can dry. Do not seal that face the same day.

5. Do not close the wall yet

New drywall comes after cleaning, drying, any needed repairs, and any inspection your city requires. The EPA says not to seal a flooded wall cavity, and not to paint, until the materials are dry on the inside.

How to clean mold as soon as you see it

Act the day you see it. Do not turn a small spot into a cloud through the house.

On a hard surface you can wash, the EPA's basic steps are: stop the water, protect yourself, scrub the growth off with detergent and water, and dry the surface completely. Do not dry-brush it, sand it, or point a fan at it. Disturbing it spreads spores. Keep the door to the rest of the house closed while you work, and bag the waste in that room.

Mold on drywall, carpet, or insulation from a flood is a removal job, not a wipe-down. Paint and stain-blocking primer do not remove what is behind the paper. The EPA says not to paint or caulk over mold. Paint on a moldy surface is likely to peel.

If the same spot comes back, the wall is still wet. Wiping it again does not fix that.

Sprays, bleach, and ozone

There is no spray that replaces removal and drying. The EPA says bleach and other biocides are not a routine substitute for cleanup. Dead mold can still cause reactions, so it has to come off the surface, not just be killed.

Where a hard, non-porous surface needs a disinfectant after the dirt is gone, the CDC says to use no more than 1 cup of household bleach in 1 gallon of water. That is a ceiling in CDC's guidance. Read the bottle. Bleach products are not all the same strength. Open windows and doors. Never mix bleach with ammonia, acids, vinegar, toilet cleaner, or another cleaner. Do not spray it on unknown chemicals the flood left behind. A stronger mix is not safer.

The Florida Department of Health says not to use an ozone generator for indoor mold. Ozone irritates lungs, and it does not fix the moisture. Do not paint wet wood and call the cavity finished.

How to dry a flooded Florida house

The EPA and CDC both push for cleanup and drying within 24 to 48 hours so mold does not get started. If the house has already been wet longer than that, assume mold may be there even when you cannot see it.

That clock is not a promise that new drywall can go up in two days. It means start the safe work as soon as you can. The EPA says drying often takes days to weeks, and that things can look dry while the inside is still wet.

Fans

Fans move air. They do not remove contaminated drywall, and they do not make sewage clean. The EPA says to clean visible mold before you start fans, so you do not blow it around. Once the dirt and the visible growth are gone, fans help moisture leave open surfaces. A dehumidifier then pulls that moisture out of the air. Do not blow dirty air into a dry room. Empty the dehumidifier tank or run it to a drain that is working.

Windows

While you are washing with detergent or bleach, the CDC says to open doors and windows. For ongoing drying, watch the outdoor air. The Florida Department of Health says to keep indoor relative humidity below 60 percent, and that below 50 percent is better for mold and dust mites. When the air outside is wetter than that, an open window can work against you. Close up, run the dehumidifier, and open cabinets, closets, and drawers so the hidden surfaces dry. A humidity gauge tells you about the air. It does not tell you whether a stud is dry.

Air conditioning and heat

Do not turn the central air on until you know the system did not take floodwater or mold. A clean system can help, and it may still need portable dehumidifiers beside it.

Do not try to bake the house with the oven or with an unvented fuel heater. Heat without a way for the water to leave can make mold grow faster. The goal is to remove moisture, not to make the room hotter.

Check the materials before you rebuild

A wall can feel dry while the bottom plate is still wet. Use a pin meter meant for wood. Test the bottom plate, several studs, and the subfloor, and compare them with a part of the house that stayed dry. Write down the room, the spot, the date, and the reading. Recheck the wettest spot, not only the easy dry one.

Iowa State University Extension, writing for flooded homes, says to get the framing below 20 percent moisture before you rebuild, because new drywall paper can pick up moisture from wet wood. Do not treat 20 percent as a reading for drywall, concrete, or a flooring product. Follow the meter instructions and the instructions for the floor or adhesive you plan to install. A concrete slab needs the test the flooring maker requires. A surface that feels dry is not that test.

Tile, vinyl, laminate, and cabinets

A floor sold as waterproof can still hide dirty water underneath. Lift a loose plank or an edge and look. Swollen wood subfloor may have to come out. Tile on concrete may be fine after it is cleaned and the slab is dry enough for the finish you want. Cabinet toe-kicks hide water. Flood-soaked particleboard boxes usually cannot be saved. Solid wood sometimes can. Do not yank a cabinet that is holding a countertop or that has supply lines and a drain in it. That is a plumbing and lifting job.

How to replace the lower drywall

Start only after the dirty material is out, the cavity is dry, electrical problems are fixed, and any required inspection is done.

Match the wall. Note the thickness and the type of board. A garage wall, a wall between units, or any fire-rated wall has to go back the way it was built. The cheapest sheet is not always the right sheet.
Give the patch something to screw to. The new strip has to land on framing or on backing you add. Joint compound is not a fastener. Pull loose scraps and bad screws first.
Put the insulation back only when you are ready to close. Do not stuff new insulation into a cavity that is still wet.
Cut the new piece to the opening you measured, in more than one place. Do not force it. Do not jam paper-faced drywall tight against a slab that can stay damp. Leave the gap the wall system calls for.
Screw it without tearing the face paper. Set the screw just below the surface. Do not use a long screw where a wire or a pipe may be hiding.
Tape and coat the seam. Let each coat dry the way the bucket says. Feather the joint so the patch does not show as a ridge. Control the sanding dust. Prime, then paint. Paint comes after the wall is dry. It is not a way to make a wet wall dry.
Trim goes on last. Use new molding, or old pieces you actually cleaned and dried. Do not nail swollen baseboard back on to hide a damp bottom plate.

A taller, cleaner patch is sometimes easier to finish than several skinny scraps. How high you cut still follows the wet and dirty material, not a rule that every wall must come down to the ceiling.

Permits, and the 50 percent flood rule

Ask your city or county building office what you may remove now for health, and what needs a permit before you rebuild. The answers are not the same everywhere.

Osceola County's flooded-home sheet lists "remove and replace drywall" as work that does not need a permit in that county, along with carpet and padding. The same sheet says a new electrical panel, new wiring, and moving water or sewer lines do need one. Another city can require a permit for the drywall itself. Call before you assume.

If the house is in a mapped flood zone, repairs can trigger a substantial-damage review. FEMA says that if the cost to repair is 50 percent or more of the building's market value before the damage, the structure is substantially damaged and has to meet current local floodplain rules. The land value does not count. Your local building official or floodplain manager makes that call, not your insurer and not FEMA. Some communities use a stricter percentage. Do not split one repair into small permits to stay under the line. Ask first.

FEMA's example: a building worth $200,000 before the damage, with $120,000 in repairs, is over the 50 percent line. Flood-insurance policyholders in a Special Flood Hazard Area may have Increased Cost of Compliance coverage, which FEMA describes as up to $30,000 toward elevating, relocating, or demolishing when the community has made a substantial-damage determination. That is policy coverage, not a promise for every house.

Common questions

Can I keep drywall that dried and looks normal?

Not if floodwater or sewage reached it. The Gypsum Association says that board must be replaced. A clean supply-line leak is a separate decision, and only when the board dried fast and is still solid.

Will bleach keep mold away for good?

No. Nothing you spray will hold mold off a surface that stays damp. Remove what you can, throw away what you cannot, and get the water out.

Can I put a fan on the mold?

No. Clean the growth you can see first. Then use fans as part of drying, not as a way to blow mold off a wall.

Can I replace only the bottom of the wall?

Yes, when the damage really is limited to the bottom. The opening has to run above the wet and dirty material, and the cavity has to be clean and dry before the new board goes on. A one-foot waterline is not proof that a one-foot patch is enough.

Can I shampoo the carpet?

Not after outdoor floodwater. Remove the carpet, the pad, and the tack strips.

Do I need a mold test?

The EPA says testing is usually unnecessary when mold is already visible. There is no federal airborne mold-count number that turns a store test kit into proof the house is safe. Do not wait on a test to remove wet carpet and wet drywall.

What if I start coughing or cannot breathe?

Leave for clean air. Call 911 for severe trouble breathing, chest pain, or collapse. Tell them you were in floodwater or mold cleanup. Floodwater also infects cuts. Wash wounds and get medical care for a cut that was in the water.

Does mold-resistant drywall make the house flood-proof?

No. It can be a better board for a damp room. It does not keep the next flood out, and it does not let you close a wall that is still wet.

Sources

Governor of Florida: Executive Order 26-228 (November 4, 2026), amending Executive Order 26-227
Florida Division of Emergency Management: floridadisaster.org
U.S. Environmental Protection Agency: A Brief Guide to Mold, Moisture, and Your Home, flood cleanup and indoor air, flooded home, mold course, including the clean-water limit and biocides, basic cleanup steps
Centers for Disease Control and Prevention: mold cleanup and bleach, cleaning safely after a disaster
Federal Emergency Management Agency: do not wait to clean, substantial damage
Gypsum Association: flood and gypsum resources, including GA-231
Florida Department of Health: indoor mold, humidity, and ozone
Osceola County Office of Building Safety: was your home flooded?
Florida Statutes: 468.841 and 468.8419
Iowa State University Extension: dry wood framing before you rebuild
U.S. Environmental Protection Agency: lead

Local debris rules, permit rules, and flood maps differ by city and county. This Is Florida is not a restoration company and is not connected to the agencies linked above. Checked November 6, 2026.

Related on this site: hurricane prep, emergency contacts, shelters, boil-water notices.