Rain intrusion and plumbing leaks leave Seattle walls and floors 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.
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Available 24/7 · Seattle and nearby areas
Mold Remediation in Seattle, WA
Rain behind siding, a leaking roof deck, or window condensation can feed mold. Our crew handles mold remediation in Seattle, WA, finds the moisture behind it, and dries the space out. Call any time, day or night.
Call (206) 804-814945minutes
IICRC Certified Firm#70120685
We work with all major insurance carriers
Mold help
Mold in Seattle homes
Seattle’s steady rain tests every building’s skin. Some condos and apartments built in the 1980s and 1990s went up without a rain screen behind the siding. Water that gets past the cladding can soak the sheathing and framing for years before mold shows inside.
Newer townhomes bring their own risks. Rooftop decks, parapet walls, and tight flashing details can leak into the floors below. The damage often appears as a ceiling stain two stories down.
Seattle also has homes on the water. Floating homes sit in constant humidity. Older Craftsman homes often have daylight basements that take on water.
Homeowners, property managers, and business owners across King, Snohomish, and Pierce counties call us about mold all year round.
Call Now (206) 804-8149Mold remediation at a glance
What’s included
Finding where rain gets through siding, decks, and windows, sealing off the area, removing moldy materials, HEPA cleaning, drying, and repairs.
Typical timeline
A bathroom or window wall takes a day or two. Envelope failures or a whole floor below a leaking deck can take longer.
How cost is set
How much wall or ceiling has to be opened, condo coordination, the water source, and the rebuild.
First visit
Call (206) 804-8149A 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 (206) 804-8149What 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 Seattle homes
In Seattle, mold usually traces back to leaks in the building envelope, rooftop decks, or constant humidity.
Daylight Basements
Older Craftsman basements take on water through long rainy stretches.
Townhome Roof Decks
Clogged drains and failing membranes leak into the floors below.
Bathrooms in Condos
In tight Seattle units, steam lingers when bathroom fans are weak, and mold grows.
Siding Without a Rain Screen
Water behind older condo siding soaks sheathing and framing.
Floating Homes
Constant humidity on the water keeps cabins and storage damp.
Window and Door Flashing
Failed flashing lets rain into wall cavities around openings.
How we remove mold
How we remove mold
In Seattle, mold returns unless the rain is kept out. We start by tracing where water is getting into the building.
We contain the space. Plastic barriers and HEPA air scrubbers keep spores out of shared hallways, neighboring units, and the rest of the home.
We open and remove what’s damaged. Moldy drywall, insulation, and sheathing come out, and framing is cleaned and treated.
We dry and coordinate repairs. Readings must match a dry area before rebuilding. We work with HOAs and envelope contractors when the fix involves siding or decks.
What the signs usually mean
Swelling or stains on an inside wall of an older condo
What it usually meansRain getting behind siding with no rain screen
What to doNotify the HOA and have the wall opened and checked.
A ceiling stain below a rooftop deck
What it usually meansA clogged deck drain or failing membrane
What to doClear the drains and have the deck and ceiling checked.
Musty cabins in a floating home
What it usually meansConstant humidity on the water
What to doRun dehumidifiers and have the walls checked.
Water in a Craftsman daylight basement
What it usually meansSeepage during long rainy stretches
What to doHave the walls checked and drainage looked at.
Mold around a window frame
What it usually meansFailed flashing letting rain into the wall
What to doHave the window and wall opened and checked.
A stale smell in a Seattle unit with nothing visible
What it usually meansGrowth in the wall behind the siding, under a deck, or in a daylight basement
What to doSchedule a check so we can read moisture behind those surfaces.
What can be saved
What can be cleaned and what gets replaced
For Seattle condos, townhomes, Craftsmans, and floating homes, what we keep depends on the material, how long it leaked, and how far growth spread. The inspection confirms each item.
Tile, glass, metal, and concrete
Usually cleanedHard surfaces clean well.
Framing with surface growth
Usually cleanedStuds and joists can usually be cleaned and treated.
Wall sheathing
Depends on how deep it goesPlywood with surface growth may clean; soft or delaminated sheathing is replaced.
Drywall
Depends on how deep it goesDrywall in a condo or townhome with a few spots may clean. Panels soaked by water coming through the siding or deck are cut out.
Fir floors
Depends on how deep it goesFir floors in older Ballard and Wallingford homes with surface mold clean up. Boards that cupped over a damp daylight basement are replaced.
Carpet
Depends on how deep it goesCarpet in a room below a leaking roof deck that grew mold on its backing is replaced.
Furniture
Depends on how deep it goesWood furniture usually cleans. Cushions and bedding in a damp floating home cabin may not.
Photos and documents
Depends on how deep it goesPhotos and papers can sometimes be restored by a document specialist if they’re moved somewhere dry right away.
Wall insulation
Usually removedInsulation soaked behind siding or under a deck is replaced.
Deck membrane and underlayment
Usually removedFailed membranes are replaced as part of the repair.
Carpet pad
Usually removedPad with growth is replaced.
Do You Need a Mold Test?
Usually not. When the mold is visible and the leak is clear, testing seldom changes the plan. It helps more when you smell mold but can’t find it, or when an HOA, buyer, or landlord needs documentation.
If testing makes sense, we can explain the options and coordinate an independent tester. In condo envelope cases, documentation can help the board plan repairs.
Stop the water behind the mold
Other restoration services we offer in Seattle
Every job starts with a free inspection and estimate. Here’s how the 24 Hour Flood Pros team helps with each type of damage.
A kitchen fire in a Seattle condo or townhome can push smoke into hallways and neighboring units. 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
Windstorms bring down trees on Seattle roofs. We dry the structure, remove damaged materials, and repair the ceilings and walls inside.
More about Storm Damage
Mold in an apartment building, an office, or a restaurant needs a plan around residents. 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 (206) 804-8149Call 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 (206) 804-8149 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.
Stain below the rooftop deck?
Call (206) 804-8149Clogged deck drains and failing membranes often leak into the floors below. 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 Washington Office of the Insurance Commissioner.
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 Seattle
We serve Seattle and communities across the Puget Sound region.
Counties
- King County
- Snohomish County
- Pierce County
Nearby cities
- Bellevue
- Redmond
- Kirkland
- Renton
- Kent
- Auburn
- Tacoma
- Everett
- Lynnwood
- Shoreline
- Bothell
- Issaquah
Don't see your area listed? Call us and we'll tell you right away.
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Common questions
Seattle 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 Seattle?
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 Washington require a license for mold remediation?
Washington doesn’t issue a specific state license for mold remediation, so it’s worth checking a company’s training and certifications before you hire it. 24 Hour Flood Pros is an IICRC Certified Firm, #70120685.
Available 24/7
Get a free inspection
Day or night, weekend or holiday, call (206) 804-8149. A crew can be there within 45 minutes to start your free inspection.
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