Rising creeks and slab leaks leave San Antonio homes wet. We extract the standing water, set up dehumidifiers and air movers, and take moisture readings every day until the floors and framing test dry.
More about Water Damage
Available 24/7 · San Antonio and nearby areas
Mold Remediation in San Antonio, TX
A damp crawl space, a roof leak, or an AC drain can feed mold. Our crew handles mold remediation in San Antonio, TX, finds the moisture behind it, and dries the space out. Call any time, day or night.
Call (830) 250-606045minutes
IICRC Certified Firm#70120685
We work with all major insurance carriers
Mold help
Mold in San Antonio homes
Gulf moisture drifts north into San Antonio for much of the year, and older homes feel it most. Older Victorian homes often sit on pier-and-beam foundations. Humid air under the floor keeps the joists damp.
Hail is a quieter source. The April 2016 hailstorm bruised roofs across the North Side. Some leaked into attics for months before a stain showed.
Flooding matters too. Bexar County has many low-water crossings, and creeks like Salado and Leon rise fast, leaving wet walls that can grow mold.
Homeowners, property managers, and business owners across Bexar, Comal, Guadalupe, Medina, Kendall, and Wilson counties call us about mold all year round.
Call Now (830) 250-6060Mold remediation at a glance
What’s included
Pier-and-beam and attic moisture control, containment, removal by remediators, HEPA cleaning, drying, and restoration.
Typical timeline
A small spot can take a day or two.
How cost is set
The size of the area, whether Texas rules call for an assessor, what comes out, and the restoration.
First visit
Call (830) 250-6060A free inspection and estimate before any work starts.
Found mold?
What to do when you find mold
Finding mold is stressful, but you have time to do this right. Acting in the first day or two keeps it from spreading.
Not sure how big the problem is? Call and talk it through with our crew.
Call (830) 250-6060What to do
Look for the water
Check above and around the mold for a drip, a damp spot, or a stain. Stopping the water stops the mold from growing.
Bring the humidity down
Run the air conditioning or a dehumidifier. The EPA recommends keeping indoor humidity below 60%, ideally between 30% and 50%.
Take photos
Photograph the mold and any water damage before anything is cleaned. Your insurance company may ask for them.
Clean small spots the right way
For a patch under about 10 square feet, the EPA says you can usually clean it yourself with detergent and water. Wear gloves, eye protection, and a mask.
Keep sensitive people away
Anyone with asthma, allergies, or a weak immune system should stay out of the area until the mold is gone.
What not to do
Don’t scrub or sand it dry
Dry mold sends spores into the air and through the house. Keep the surface damp while you clean it, or leave it for a pro.
Don’t bleach it and paint over it
Bleach can whiten the surface, but on drywall and wood it doesn’t reach the mold growing inside. Paint over mold peels, and the mold keeps growing underneath.
Don’t point fans at it
Fans blowing across mold carry the spores into other rooms.
Don’t run the heat or air if the mold is in the ducts
The system will blow spores through the whole house. Leave it off until it’s been checked.
Don’t buy a test kit first
If you can see mold, the EPA says testing usually isn’t needed. Spend the money on finding the leak.
Where mold hides
Where we find mold in San Antonio homes
In San Antonio, mold usually comes from humid air under older homes, slow roof leaks, or creek flooding.
Pier-and-Beam Crawl Spaces
Humid Gulf air under older homes keeps joists and heart pine subfloors damp.
Attics on the North Side After the 2016 Hail
Roofs patched instead of replaced after the big April 2016 hailstorm can still let rain past bruised shingles into the insulation.
Bathrooms in Historic Homes
Aging cast-iron drains and tiled showers leak into San Antonio plaster and floors.
Air Handlers in Hot Bexar County Attics
An attic unit cooling a stucco home through a South Texas summer sheds a lot of condensate, and a clogged line drips onto the ceiling.
Salado and Leon Creek Flooding
Heavy rain pushes creeks over their banks into nearby homes.
Slab Leaks in Newer Homes
Plumbing under North Side slab homes can leak slowly into flooring and baseboards.
How we remove mold
How we remove mold
In San Antonio, mold returns unless the moisture under the floor, in the attic, or from a leak is fixed. We start there.
Texas licensing applies. Texas requires mold remediation to be done by a licensed mold remediator, regulated by the Texas Department of Licensing and Regulation.
We contain and remove carefully. In historic homes, we protect plaster, heart pine, and trim where possible, removing only what mold has ruined.
Repairs wait for dry readings. Joists and walls must test dry before we restore what came out.
What the signs usually mean
A musty smell rising through old wood floors
What it usually meansHumid air and mold under a pier-and-beam home
What to doHave the crawl space and joists inspected.
A faint ceiling ring in a North Side home
What it usually meansA slow leak from hail-damaged shingles
What to doHave the roof and attic insulation checked.
Soft plaster near an old bathroom
What it usually meansA leaking cast-iron drain or shower pan
What to doHave the plumbing and wall checked.
Drywall sagging under the hall return in a stucco ranch
What it usually meansA pan under the attic unit rusted through and dripped for weeks
What to doReplace the pan, then have the ceiling, joists, and insulation checked.
Lower walls still damp days after a low-water crossing flooded nearby
What it usually meansSilt-laden creek water that wicked up drywall and batts
What to doCut the walls above the wet line and dry the cavities.
A heavy, old-house odor in a Monte Vista home that won’t clear
What it usually meansGrowth on the underside of the subfloor or behind lath and plaster
What to doHave the crawl space and walls probed with a moisture meter.
What can be saved
What can be cleaned and what gets replaced
From historic Victorians to newer San Antonio builds, what we keep depends on the material, how long it stayed wet, and how far growth spread. The inspection confirms each item.
Saltillo tile, limestone, and glass
Usually cleanedHard surfaces and limestone clean well.
Old-growth joists and beams
Usually cleanedLongleaf and cypress framing under older homes with surface growth can usually be cleaned, treated, and kept.
Heart pine floors
Depends on how deep it goesSurface mold cleans; boards rotted from below are replaced or patched to match.
Original plaster
Depends on how deep it goesSound plaster cleans; damaged sections are repaired carefully.
Drywall in newer homes
Depends on how deep it goesDrywall in a newer Stone Oak or Alamo Ranch home with a few spots may clean. Panels grown through are cut out.
Carpet
Depends on how deep it goesCarpet over a slab leak or in a flooded room that grew mold on its backing is replaced.
Antiques and furniture
Depends on how deep it goesAntique wood furniture usually cleans with care. Upholstered pieces with deep growth may not.
Photos and documents
Depends on how deep it goesFamily photos and keepsakes, from quinceañera albums to military records, can sometimes be restored by a document specialist.
Attic insulation
Usually removedBlown-in attic insulation soaked by an old hail leak or an AC overflow is replaced.
Carpet pad
Usually removedPad with growth is replaced.
Crawl space vapor barrier
Usually removedA torn or moldy vapor barrier under a pier-and-beam home is pulled and replaced.
Do You Need a Mold Test?
Usually not, if you can see the mold. The EPA says that in most cases, testing isn’t needed when mold is visible. What matters is removing it and fixing the moisture.
Testing can help when you smell mold but can’t find it, or to confirm a cleanup worked. There are no federal limits for mold levels, so results need someone experienced to read them. We’ll tell you whether a test is worth it for your situation.
Stop the water behind the mold
Other restoration services we offer in San Antonio
Every job starts with a free inspection and estimate. Here’s how the 24 Hour Flood Pros team helps with each type of damage.
Fires leave soot in San Antonio plaster and woodwork. Soot is acidic and keeps staining surfaces, so cleanup starts early. We remove soot, treat odor at the source, clean what can be saved, and rebuild what can’t.
More about Fire and Smoke Damage
Hail and severe storms tear up roofs across Bexar County every spring. We dry the structure, remove damaged materials, and repair the ceilings and walls inside.
More about Storm Damage
Mold in River Walk restaurants, offices, or rentals needs a licensed plan. We extract, dry, and clean on a plan built around reopening, and we document each step for your carrier.
More about Commercial Restoration
When you’re ready to rebuild, the same crew puts it back together, from drywall to cabinets to the final coat of paint, so there’s no second contractor to hire.
More about ReconstructionDealing with one of these?
Call (830) 250-6060Call and talk to our crew about what happened. The call is free, and so is the inspection.
Our process
What happens after you call
- 1
You call, we send a crew
Call (830) 250-6060 any time, day or night, including weekends and holidays. Tell us what you’re seeing or smelling, and where. We’ll send a crew right away.
- 2
We inspect and find the source
The 24 Hour Flood Pros team looks for the moisture feeding the mold. We use moisture meters to find water hiding inside walls, under floors, and in the crawlspace. We take photos for your insurance. The inspection is free.
- 3
We close off the area
We seal the work area with plastic and set up HEPA air scrubbers, so spores don’t spread to clean rooms. The heat and air stay off in that area while we work.
- 4
We stop the moisture
We dry out the water and show you what’s causing it. If a plumber, a roofer, or an HVAC tech needs to fix a leak, we tell you before we go further.
- 5
We remove moldy materials
Drywall, insulation, and carpet pad with mold growing in them are cut out, bagged, and carried out. That way we only remove what really needs it.
- 6
We clean and dry what stays
Framing, subfloor, and other solid surfaces are HEPA-vacuumed, cleaned, and treated. Then we dry them until they read close to a dry room elsewhere in the house.
- 7
We make the repairs
When you’re ready, the 24 Hour Flood Pros team fixes the damage. We replace drywall, install cabinets, and finish with fresh paint. Our goal is to make your home look the way it did before.
- 8
Final check with you
Before we take the plastic down, we check the area for any mold or dust left behind. Then we walk through it with you and send the final records to your insurance company to close out the claim.
Musty smell under a historic home?
Call (830) 250-6060Humid air under pier-and-beam floors can feed hidden mold on the joists. Call us for a free inspection.
Insurance and claims
Mold remediation and your insurance claim
Sometimes. Many homeowners policies cover mold when it comes from a sudden, covered water event, like a burst pipe or a water heater that gives out. Mold from a slow leak or ongoing humidity is often excluded, and some policies cap mold coverage at a set amount.
Your policy decides what’s covered, not us. We work with all major insurance carriers, including State Farm, Allstate, Liberty Mutual, Farmers, American Family, Travelers, and Nationwide, and we keep the paperwork clear enough that your claim doesn’t stall.
Report it soon after you find it. Waiting can make it harder to show the mold came from a sudden event.
If a claim stalls, you can file a complaint with the Texas Department of Insurance, (800) 252-3439.
What your adjuster will ask for
- When you first noticed the mold or the smell
- What caused the moisture, and when it started
- Photos of the mold and any water damage
- Receipts for any work already done on the leak
What we send them
- Date-stamped photos of each affected area
- Moisture readings showing where the water is
- A line-by-line estimate for removal and rebuild
- One point of contact for your adjuster
Where we work
Areas we serve around San Antonio
We serve San Antonio and communities across Bexar County and the Hill Country edge.
Counties
- Bexar County
- Comal County
- Guadalupe County
- Medina County
- Kendall County
- Wilson County
Nearby cities
- New Braunfels
- Schertz
- Cibolo
- Converse
- Universal City
- Leon Valley
- Helotes
- Alamo Heights
- Boerne
- Seguin
- Castroville
- Floresville
Don't see your area listed? Call us and we'll tell you right away.
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Common questions
San Antonio mold remediation FAQs
How fast can 24 Hour Flood Pros get to me?
A crew can be there within 45 minutes. We work 24/7, including nights, weekends, and holidays, so you can call the moment you find mold or a leak.
Is black mold dangerous?
Any mold growing indoors should be removed, whatever its color. The CDC’s advice is that you don’t need to know the type of mold to deal with it. Mold can trigger allergies and asthma, so people with breathing problems or weak immune systems should stay away from it.
Can I clean mold myself?
For a small area, yes. The EPA says a patch under about 10 square feet, roughly 3 feet by 3 feet, can usually be cleaned with detergent and water while you wear gloves, eye protection, and a mask. Call a professional for anything larger, mold in the heating and air system, mold after sewage or flood water, or mold that keeps coming back.
Do I need a mold test before remediation?
Usually not if you can see the mold. Testing is most useful when you smell mold but can’t find it, or to confirm the cleanup worked.
Will the mold come back after remediation?
Not if the moisture is fixed. Mold comes back when the leak, the drainage problem, or the humidity is still there. That’s why every job starts with finding the source, and why we dry everything before the walls are closed.
Do I need to leave my home during mold remediation?
Usually not. We seal off the work area and filter the air, so most people stay home. For large jobs, or if someone in the house has breathing problems, we’ll tell you in advance if staying somewhere else makes sense.
How much does mold remediation cost in San Antonio?
It depends on how big the area is, what has to be removed, how hard it is to reach, and what it takes to stop the moisture. A bathroom wall costs far less than a whole crawlspace or attic. The inspection and estimate are free, so you know the cost before any work starts.
How long does mold remediation take?
A small area can take a few days. Crawlspaces, attics, and rooms that need rebuilding take longer. Your estimate includes a schedule.
Does Texas require a license for mold remediation?
Yes. Texas requires mold remediation to be done by a remediator licensed through the Texas Department of Licensing and Regulation. Ask to see a current license before you hire anyone.
Available 24/7
Get a free inspection
Day or night, weekend or holiday, call (830) 250-6060. A crew can be there within 45 minutes to start your free inspection.
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