24/7 emergency mold response

Breathe easy again.

Finding mold in your home or business is stressful, and you do not have to deal with it alone. We connect you with crews who remove the mold, fix what caused it, and make your space safe.

Get a free referral (877) 349-1231
  • Experienced local crews
  • Vetted independent pros
for mold to start growing on a wet surface
24–48 hours
States served
18
Cities covered
1,250+

In short: mold remediation means finding the moisture source, sealing off the affected area, removing the growth, drying and treating the materials, and checking the result with an air test. Work that skips the moisture source is only cleaning, and the mold comes back.

Where mold hides

Where mold actually hides in a house

Most of it starts somewhere you cannot see. Pick a spot on the cutaway to see what causes mold there, what it looks like and how urgent it is.

Cutaway illustration of a two-story house showing the attic, bathroom, kitchen, HVAC system, laundry area, basement and exterior walls

Attic and roof deck

Inspect this week
What causes it
A roof leak, or a bathroom fan that vents into the attic instead of outside. Warm, wet air meets the cold underside of the roof deck and condenses there night after night.
What you see
Dark gray or black staining on the plywood between the rafters, often worst on the shaded side of the roof. Sometimes frost in winter.
What you smell
Usually nothing from inside the house, which is why attic mold can go unnoticed for years.
Why that urgency
It spreads slowly but gets expensive to ignore, because the roof sheathing is what rots.

Cleaning alone is never the whole fix. If the bathroom fan is the source, it has to vent outside and the soffit vents need to breathe, or the same stain is back in a winter or two.

National average for this area $1,000 – $4,833 A range, not a quote. Source: our cost guide.

Get this area inspected

Bathroom and shower wall

Inspect this week
What causes it
Failed grout or caulk lets water get behind the tile, and without a fan nothing dries what is left on the surface.
What you see
Black specks along the caulk line, bubbling paint above the tile, a soft spot in the floor by the toilet.
What you smell
A damp, earthy smell that is strongest right after a shower.
Why that urgency
Surface growth is manageable. A soft floor means the water is already behind the wall.

Mold on caulk really is a do-it-yourself job. Press on the wall next to the tub, though: if it gives, water is behind it and you are past the point of cleaning.

National average for this area $500 – $1,333 A range, not a quote. Source: our cost guide.

Get this area inspected Getting rid of black mold in the bathroom

Windows and exterior walls

Worth watching
What causes it
Condensation running off single-pane glass or a failed double-pane seal, or window flashing that leaks into the wall cavity.
What you see
Black spots on the frame and sill, peeling paint under the window, a stain that comes back after you paint over it.
What you smell
Usually nothing. This one you see rather than smell.
Why that urgency
Often it is only condensation. A stain that bleeds back through fresh paint, though, is a leak.

Two different problems that look the same. Condensation clears up once the room is better ventilated. A flashing leak does not, and painting over it just hides it until the next wet season.

Get this area inspected Removing mold on windows

Under the sink and behind appliances

Call today
What causes it
A supply line or drain losing a few drops a day behind the dishwasher, the fridge ice line or inside the sink cabinet, where nobody looks.
What you see
A swollen, dark edge on the cabinet floor. Buckled flooring in front of the dishwasher.
What you smell
Musty when you open the cabinet, and not much otherwise.
Why that urgency
A slow leak inside a closed cabinet grows fastest, since no air moves in there.

By the time the cabinet floor swells, the leak has usually been going for months and the subfloor is involved too. Pull the appliance out before you call anyone, and photograph what you find.

Get this area inspected

HVAC, ducts and the air handler

Call today
What causes it
A clogged condensate drain, or an oversized system that cools the air fast without pulling the moisture out. The drip pan stays wet and the blower spreads whatever grows in it.
What you see
Standing water in the drip pan, dark growth on the insulation inside the air handler, dust that comes back days after you clean.
What you smell
A smell that shows up when the air conditioning kicks on and fades when it shuts off. That timing gives it away.
Why that urgency
This is the one that affects the whole house instead of a single room.

Growth in one small spot here can put spores in every room. If symptoms follow the air conditioning, look here before you look at the walls.

Get this area inspected Removing mold from air conditioner ducts

Laundry and water heater

Inspect this week
What causes it
A washer hose, a water heater that has started to weep at the base, or a dryer that vents into the room instead of outside.
What you see
A rust ring under the heater, damp drywall behind the machines, growth on the back of the door.
What you smell
Musty and warm. People tend to blame the laundry itself.
Why that urgency
A water heater that weeps today is a water heater that bursts later.

A dryer that vents indoors dumps the moisture from every load into the room. It is one of the cheapest mold causes to fix, and one of the easiest to miss.

Get this area inspected

Basement and foundation wall

Inspect this week
What causes it
Water coming through the foundation, usually because the yard slopes toward the house or a downspout empties right beside it.
What you see
A tide line on the wall, growth on stored cardboard and fabric before the wall itself, white chalky powder on the concrete.
What you smell
The classic basement smell. It is not "old house", it is something growing.
Why that urgency
It keeps coming back every wet season until the water is sent somewhere else.

The white chalky powder is efflorescence, mineral salt left behind as water passes through concrete. It is not mold, but it proves water is moving through that wall, so it still matters.

National average for this area $833 – $3,167 A range, not a quote. Source: our cost guide.

Get this area inspected Removing mold from a basement wall

Gutters, siding and grading

Worth watching
What causes it
Overflowing gutters and soil that slopes toward the house. Most of the other problems on this drawing start here.
What you see
Green and black streaks on the siding, soil washed up against the wall, a downspout that ends at the foundation.
What you smell
Nothing indoors, which is exactly why it goes unfixed.
Why that urgency
Not a health problem outside, but it causes the ones inside.

Extending the downspouts and fixing the grading is usually the cheapest item on this page, and it is what keeps a basement problem from coming back.

Get this area inspected

Water damage timeline

What happens inside the wall, hour by hour

Everyone tells you to call right away after a leak. Here is why. Step through the first month and watch what the water does while the wall still looks fine.

Drag the marker or use the arrow keys.

  1. Hour 0 · Nothing is growing yet

    The water arrives

    Inside the wall

    Drywall, carpet backing and the wood behind them start soaking it up. A wall pulls water well past the line you can see on the paint.

    What to do today

    Stop the source. Photograph everything before you move it, because that is what your insurer will ask for. Get the standing water off the floor.

  2. 6 hours · Still ahead of it

    It spreads out of sight

    Inside the wall

    Moisture has wicked up inside the wall cavity and under the flooring. The surface can look dry when it is not.

    What to do today

    Open windows, run fans, lift the edge of the carpet. If drywall or subfloor got soaked, call now rather than tomorrow.

  3. 24 hours · Last easy window

    The clock that matters

    Inside the wall

    Spores that were sitting in the dust now have the moisture they need. Nothing shows yet, but growth has started.

    What to do today

    Professional drying at this point still means drying. After this, it starts to mean removal and replacement.

  4. 48 hours · This is the line

    Growth becomes visible

    Inside the wall

    Mold has taken hold on wet drywall paper, cardboard and wood. At normal room temperature, 24 to 48 hours is the window most sources give.

    What to do today

    Do not point a fan at visible growth, since that blows spores through the house. Close the room off and stop treating it as a cleaning job.

  5. Day 7 · The bill grows

    The materials go

    Inside the wall

    Growth has gone through the drywall paper and into the insulation behind it. Anyone who walks in can smell it.

    What to do today

    The job changes from drying a room to cutting out and replacing part of it. Same leak, a much bigger bill.

  6. Day 30 · Health and structure

    Structural, and in the air

    Inside the wall

    Framing and subfloor start to be affected. Indoor spore levels run higher than outdoor ones, which is what an air test picks up.

    What to do today

    Now it takes full containment, negative air, removal and a clearance test afterward. This is the job everyone hoped to avoid at hour zero.

Before you panic

Is it mold, or something that looks like it?

Plenty of what people call mold turns out to be one of three lookalikes. Compare yours with these four, then try the quick test for each one.

Drawing of mold on painted drywall
Illustration: mold on painted drywall

Yes, this is mold

Mold

How to tell

  • Fuzzy or speckled edges, never a clean line.
  • Grows in uneven clusters, often in a corner or along a seam.
  • Comes back in the same spot after you wipe it.
  • Smells musty when the room has been shut up.

The test

Dab it with a cotton swab dipped in diluted detergent. Mold smears and lifts color. Dirt just moves around.

Drawing of efflorescence on a brick wall
Illustration: efflorescence on a brick wall

Not mold, but still a warning

Efflorescence

How to tell

  • White or grayish, crystalline and powdery.
  • On concrete, brick or block, almost never on drywall.
  • Brushes off dry and leaves nothing behind.
  • No smell at all.

The test

Mineral salt left behind as water moves through masonry. It is not a health problem, but it proves water is getting through that wall, so it is still worth a look.

Illustration: soot above a baseboard heater

Not mold

Dirt and soot

How to tell

  • Follows the air: streaks above radiators, around vents, along the top of baseboards.
  • Even and directional, often in straight lines.
  • Wipes off and stays off.
  • Worst near candles, a fireplace or a heating vent.

The test

Sometimes called ghosting: soot and dust settling on the cold spots of a wall. A cleaning job, not a remediation one.

Illustration: an old water stain on a ceiling

Not mold yet

Old water stain

How to tell

  • Brown or yellow, with rings like a coffee stain.
  • A hard outer edge where the water stopped.
  • Dry and firm to the touch.
  • Usually on a ceiling, below a bathroom or the roof.

The test

The stain itself is old news. What matters is whether it is still getting wet. Press on it: if it gives at all, the material behind it has been wet for a while.

DIY or call

Can you clean it yourself?

Plenty of mold does not need a contractor. Answer four questions and you get a straight answer, even when that answer is to clean it yourself and keep your money.

Question 1 of 4

How big is the affected area?

Count what you can see plus the damp area around it.

Is it still wet?

Press the material with a knuckle instead of trusting how it looks.

Where did the water come from?

This is the question that decides whether it is a cleaning job at all.

Who lives there?

Not a scare question. It really does change the recommendation.

Where your answers point

The marker moves as you answer.

  • Do it yourselfSmall, dry, clean water, nobody vulnerable
  • Inspect firstBigger, still damp, or someone sensitive at home
  • Call a professionalLarge, sewage water, or an active leak

The 10 sq ft line is the EPA’s: below it, most homeowners can clean mold up themselves.

The three possible answers

Do it yourself

You can probably handle this yourself

A small, dry patch from clean water, with nobody vulnerable at home. That is usually a do-it-yourself job, not one worth paying for.

Based on what you told us

  • The affected area is small.
  • The area is past the roughly 10 sq ft point where the EPA suggests calling a professional.
  • The area is large or spread across rooms.
  • The material has been dry for a while.
  • The material is still damp, so the moisture source may still be active.
  • Water is still getting in.
  • The water was clean.
  • Gray water carries bacteria, which changes how the cleanup is done.
  • Sewage or unknown water has to be treated as contaminated.
  • Nobody at home is especially sensitive.
  • Someone at home is more sensitive to mold.
  1. Fix the moisture source first. Cleaning before that wastes an afternoon.
  2. Open a window and wear gloves and an N95 mask, not a dust mask.
  3. Scrub hard surfaces with soap and water. Bleach is not needed and does not work on porous material.
  4. Throw out porous things that got soaked, such as carpet padding, cardboard and ceiling tiles.
  5. Check the same spot in two weeks. If it is back, the water is still getting in.
Call (877) 349-1231

Inspect first

Get it inspected before you touch it

It is bigger than a DIY clean, it is still wet, or someone at home is sensitive. An inspection costs little next to guessing wrong.

Based on what you told us

  • The affected area is small.
  • The area is past the roughly 10 sq ft point where the EPA suggests calling a professional.
  • The area is large or spread across rooms.
  • The material has been dry for a while.
  • The material is still damp, so the moisture source may still be active.
  • Water is still getting in.
  • The water was clean.
  • Gray water carries bacteria, which changes how the cleanup is done.
  • Sewage or unknown water has to be treated as contaminated.
  • Nobody at home is especially sensitive.
  • Someone at home is more sensitive to mold.
  1. Do not sand, scrape or blow air across it. That moves spores into the rest of the house.
  2. Close the door to the room and keep it closed.
  3. Photograph it now, before anything is disturbed, for your insurer.
  4. An inspection shows whether the moisture is still active and how far it spread inside the wall.
Call (877) 349-1231

Call a professional

Stop, and leave it alone

A large area, sewage water, or an active leak with someone vulnerable at home. This needs containment before anything is removed.

Based on what you told us

  • The affected area is small.
  • The area is past the roughly 10 sq ft point where the EPA suggests calling a professional.
  • The area is large or spread across rooms.
  • The material has been dry for a while.
  • The material is still damp, so the moisture source may still be active.
  • Water is still getting in.
  • The water was clean.
  • Gray water carries bacteria, which changes how the cleanup is done.
  • Sewage or unknown water has to be treated as contaminated.
  • Nobody at home is especially sensitive.
  • Someone at home is more sensitive to mold.
  1. Stay out of the area as much as you can, and do not run fans or the HVAC through it.
  2. Shut off the water if you can reach the valve safely.
  3. Keep children, pets and anyone with a breathing condition away from that part of the home.
  4. Call now. Sewage water and large-area growth need containment and negative air from a trained crew.
Call (877) 349-1231

How we work

Four steps from problem to peace.

A clear process with no surprises, from the first inspection to the prevention plan that keeps mold from coming back.

  1. Schedule an inspection

    We pick a time that works, then a technician does a full assessment with moisture and mold-detection tools. You get a clear report on what is affected and what it takes to fix.

    Moisture and mold-detection tools

  2. Get a custom plan

    We build a plan around your specific problem and walk you through the steps, timeline, and prep needed. Work gets scheduled when it suits you.

    Scheduled when it suits you

  3. Mold removal

    Using proper equipment, the crew removes the mold, treats the affected areas, and sanitizes to clear out lingering spores.

  4. Final check & prevention

    A last inspection confirms the mold is gone. Then you get practical tips to keep moisture and mold from coming back.

    Tips to keep it from coming back

Where to start

Every job starts with the inspection. Request one online, or call the 24/7 line and we will connect you with a local crew.

Ask for a free referral

Scrolls sideways. Use the Left and Right arrow keys to move one card at a time.

Let us help you

Mold is stressful. You are not alone.

Finding mold in your home or business is unsettling, but it is a solved problem. Drawing on the experience of the crews we work with, our team guides you through every step with a steady hand. Our 24/7 support center assesses the situation quickly and connects you with a highly rated, licensed, bonded, and insured local company to get the work started.

  • Certified, experienced teamsMold is handled by people trained to do it safely, not a general handyman.
  • 24/7 support centerCall any hour and we connect you with a local provider.
  • Current methods and equipmentUp-to-date tools and products on every job, large or small.
  • Fair, transparent pricingYou see what drives the cost up front, with no padded surprises.
Get a free referral Call (877) 349-1231
A family relaxing together in a clean, healthy home

Our services

Everything mold, handled end to end.

From the first inspection to clean air and a dry, repaired space, one team coordinates the whole job.

Price ranges

What mold remediation costs

The honest answer is that it depends. So here is what it depends on, with the national ranges from our cost guide, before you pick up the phone.

  • Independent professional inspection A standalone inspection with a written report. It can take up to six hours.
    $200 – $600
  • Small surface job One contained area, such as a bathroom wall.
    $500 – $1,500
  • Bathroom
    $500 – $1,333
  • Crawl space
    $500 – $1,833
  • Basement
    $833 – $3,167
  • Attic Depends on the size of the attic and how easy it is to get into.
    $1,000 – $4,833
  • Typical project What most homeowners pay. The national average is around $2,325.
    $1,500 – $3,150
  • Large or structural work
    $3,000 – $6,000

National averages, not quotes. General pricing runs about $15 to $30 per square foot, and labor about $75 to $120 per hour. An inspection is the only way to get a real number for your home. Read the full cost guide.

Why do two similar jobs come out at different prices? See the five things that move the number

In the order they hit your invoice. The bars show how much each one actually moves it.

  1. How much of it is porous

    Tile and concrete get cleaned. Drywall, insulation, carpet padding and cardboard get removed and replaced. That split is most of the invoice.

    Impact on price: 5 of 5. Biggest single factor

  2. Whether the water is still coming in

    Remediation on a wall that is still getting wet is money spent twice. Some jobs need a plumber or a roofer first. The crew will tell you if yours does.

    Impact on price: 4 of 5. Can double the job

  3. How hard it is to reach

    A crawl space you have to belly-crawl through costs more than a basement you can walk into, for the same square footage.

    Impact on price: 3 of 5. Adds labor hours

  4. Which category the water is

    Clean supply water, gray water from appliances and sewage are three different protocols, with three different price levels.

    Impact on price: 4 of 5. Changes the protocol

  5. Whether it needs clearance testing

    For a rental, a sale or an insurance claim, you usually want the post-work test. For your own peace of mind, it is optional.

    Impact on price: 2 of 5. Optional in most homes

Insurance

Will insurance pay for this?

This is general guidance, not policy advice; your own policy is what decides. But the answer usually looks like this, and knowing it before you call your insurer helps.

“Sudden and accidental”

The phrase that matters. It shows up in most policies, and it usually decides the claim.

Usually covered

It happened in a moment

  • A pipe that burst or split suddenly.
  • A water heater or appliance that failed without warning.
  • Storm damage that let water in through the roof or a window.
  • An overflow you could not have seen coming and reported right away.

Usually not covered

It built up over weeks or months

  • A slow leak that went on for months.
  • Humidity, condensation and poor ventilation.
  • Groundwater and surface flooding, unless you carry separate flood insurance.
  • Damage from put-off maintenance, like clogged gutters, bad grading or failed caulk.

Insurers treat these as upkeep rather than a sudden event.

What to document today

Do this before anything is cleaned or moved. Tick each one off as you go.

Ask for the inspection report in writing so you can hand it straight to your adjuster.

Does insurance cover mold? The full guide

Health signs

Symptoms people do not connect to their house

This is not a diagnosis, and we are not doctors. But the same handful of symptoms comes up again and again, and one pattern is worth knowing.

  • Often the first thing people notice and the last thing they connect to the house. Usually worse in the morning, after a night of breathing bedroom air.

  • Looks just like a seasonal allergy, except it does not follow the seasons.

  • The most common one, and the one most often treated as a stubborn sinus problem for months before anyone looks at the building.

  • It tends to feel like irritation rather than an infection, usually without a fever.

  • The one that matters most. Damp indoor air is linked to more asthma flare-ups, so if someone at home has asthma, this is a health problem rather than a comfort one.

  • Less common than the breathing symptoms, and usually where skin touches an affected material: a damp couch, a carpet, bedding pushed against a cold outside wall.

The pattern that gives it away

Symptoms that ease within a day or two away from home and come back within hours of returning. An allergy travels with you. A building does not.

When to see a doctor about mold exposure

Know the signs

Mold often hides before you see it.

You can smell mold before you spot it, and it likes the parts of a home that do not get much air. If any of these sound familiar, it is worth an inspection.

  • Discoloration or staining on drywall
  • Bubbling paint or wallpaper, a sign of trapped damp
  • Unexplained stains on upholstery or a mattress
  • More bugs than usual gathering in one area
  • A musty, earthy smell, strongest in low-airflow spaces
  • Condensation around air-duct entrances

Mold cleanup guide

Mold information for your home or business.

Hiring a certified mold remediation company is an important decision, and we are here to help. Beyond property damage, mold produces allergens and irritants with real health effects, so it is worth understanding what you are dealing with.

What does black mold look like?

Black mold is dark in color. Once mature it looks black; earlier on it is closer to dark brown or green, and while it develops it can look like dirt. The spore clusters are small, almost like the spray from a paintbrush, usually in a corner or along a wall join. Unlike most molds, black mold is wet and slimy to the touch.

What does mold smell like?

The earthy smell of mold is one most people recognize, and you can often smell it before you see it. If a room carries that musty smell, it is worth tracking down the source. Given time to settle, black mold has a distinctive dirt-like odor, stronger than most other species.

What materials can mold damage?

Mold can appear on almost any organic material. Wood, drywall, fabric, insulation, tiles, and wallpaper are all on the menu. Combine the nutrients in those materials with a damp or humid environment and enough time, and mold takes hold.

What does mold remediation cost?

Cost depends on the situation: the size of the affected area, how hard the mold is to reach (a crawl space or roof costs more than a living-room wall), and how severe the damage is. An inspection is the only way to get a real number.

When should you leave your home?

Small mold you can usually live with while you deal with it. If it starts affecting air quality, you may want to step away for comfort. Where the damage is severe enough to threaten the structure, it is best to arrange professional remediation and stay elsewhere until the removal is done.

Common questions

Mold remediation, answered.

How long does it take black mold to grow?

Mold can begin forming within 24 to 48 hours of a surface staying damp. Black mold develops and settles over the following days and weeks if the moisture source is not fixed, which is why finding the leak matters as much as cleaning the surface.

Do I really need mold remediation?

Small surface spots you can often manage with cleaning and bleach. But once mold affects the air, spreads behind drywall, or the area is large, professional remediation is the safe call, because mold produces allergens and irritants that have real health effects.

At what temperature does mold grow?

Mold thrives in warm, damp conditions, roughly the same comfortable indoor range people live in. Moisture and humidity matter far more than temperature, so controlling damp is the real lever for preventing growth.

How do you get rid of mold in bathtubs?

Bathrooms stay damp, so mold settles into caulk and grout. Scrub with a mold-killing cleaner, dry the area fully, and improve ventilation. If it keeps returning, there is usually a moisture source worth inspecting.

How do you remove mold from air conditioner ducts?

Mold in ducts spreads spores every time the system runs, so it is one to take seriously. Ducts need proper cleaning and sometimes sealing. Because the system pushes spores through the whole building, this is a job for a professional crew.

24/7 emergency response

Found mold? Do not wait it out.

Mold spreads within days and damages both air quality and the materials around it. Call now, and a local crew will take it from here.

Call (877) 349-1231 Ask for a free referral

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