Gateway St. Louis Water Damage Restoration logoGateway St. Louis Water Damage RestorationSt. Louis, MO
(314) 597-7468Get in touch →
Mold Remediation · St. Louis

Mold Remediation in St. Louis

When mold spreads through a St. Louis home, we find the moisture, contain the growth, and clean it out the right way.

Free Quote

Free Mold Remediation quote.

We reply within 1 business hour. No spam, ever.

Mold growth on drywall after water damage
Plastic sheeting containing mold remediation work
HEPA air scrubber and containment equipment
What we do

Mold Cleanup Done to Standard, Not Guesswork

St. Louis summers run humid, and that moisture feeds mold. After a basement leak, a slow pipe drip, or river water from a spring storm, spores take hold within a day or two. A musty smell often shows up first, then dark or fuzzy patches on drywall, trim, or the boxes you have stored downstairs. We treat mold as a moisture problem first. Our crew traces where the water comes from, reads the moisture in walls and floors with meters, and stops the source before we ever touch the growth. Skip that step and the mold comes back in a matter of weeks. Left alone, it spreads across the paper face of drywall and eats into any wood it can reach. We follow the EPA and IICRC guidance for assessment and cleanup, so the work holds up long after we leave your home.

Mold rarely stays in one spot. It travels through drywall, behind baseboards, and into the floor joists of the older brick homes all over this city. Before we remove anything, we seal off the work area with plastic sheeting and run negative air so spores do not drift into clean rooms. We wear respirators. Floors get covered and doorways get taped, so the rest of the house is protected the entire time we are in it. Then we take out what cannot be saved, scrub and treat what can, and dry every surface down to a safe moisture reading. Air scrubbers with HEPA filters run the whole time. We check the rooms next door too, since spores ride the air and settle wherever it is damp. We bag and haul the waste, wipe the cavity clean, and test the air before we call the job done. You get a clear picture of what we found and what we fixed.

  • We start by finding the water. Mold is only the symptom, so we trace the leak, the seepage, or the storm water that fed it, shut that source off, and dry the space out before we ever touch the growth.
  • We seal the room with plastic sheeting and negative air, the way the EPA and IICRC spell it out, so spores stay inside the plastic and never reach the clean rooms of your home.
  • Ruined drywall, carpet pad, and insulation come out. Then we clean and treat the framing, the subfloor, and every surface that is still sound enough to keep.
  • We dry the structure with air movers and dehumidifiers. Then we prove it with meters, not with a hand on the wall.
  • We take the job ourselves and get out fast, often the same day, because mold keeps feeding on damp material every hour you wait.
Kill the moisture and the mold has nowhere to grow. That is where every job we do begins.

We work across the St. Louis area, from Soulard and Tower Grove to Kirkwood, Webster Groves, Florissant, and out into St. Charles County. Many homes here sit over full basements that take on water in heavy rain, and that damp lower level is where we find the most hidden mold. We have seen it behind finished walls, under bathroom tile, inside the HVAC returns, and along the rim joist where the foundation meets the framing. From a finished basement near Forest Park to a flooded lower level in South County, the cause is almost always trapped moisture with nowhere to dry. Whatever the spot, we explain the cause in plain terms and give you a straight plan with clear steps. No upselling, no scare tactics, just the work that fixes it for good.

If you smell something musty or see dark spots spreading on a wall, call us. We will inspect the area, find the moisture behind it, and lay out exactly what the cleanup takes. The sooner we get there, the less your St. Louis home loses to mold.

Materials

The gear we bring to a mold job

Mold work is mostly containment and air control. Before a single piece of drywall comes out, our crew builds a sealed work area with plastic sheeting and tape, then sets a machine that holds the room under negative pressure. That pull keeps the dirty air inside the plastic and sends it out through a filter instead of down your hallway. We wear respirators, suits, and gloves for the same reason. HEPA air scrubbers run the entire time we are in the space, and they keep running while the drying gear works. We cut and remove ruined material wet or bagged, so spores are not thrown into the air on the way to the truck. Moisture meters and a thermal camera tell us where water still sits behind a wall or under a floor. We keep reading them until the framing tests dry. The EPA and IICRC both describe this order of work, and we hold to it on a closet job the same way we hold to it on a whole basement.

Some of what mold touches can be cleaned. Some of it cannot, and we tell you which is which before we start. Soft material holds growth down in its fibers where no brush reaches, so soaked carpet and pad, insulation, ceiling tile, particle board, and cardboard storage go out to the dumpster. Drywall gets cut back well past the visible growth, because the paper face feeds mold long before a stain shows on the surface. Hard and solid material is a different story. Framing lumber, subfloor, block, concrete, tile, and metal get scrubbed, treated with cleaners rated for the job, then dried with air movers and dehumidifiers until a meter reads normal. Wood that stays sound after cleaning stays in your house. We photograph what we haul and write it down, so you and your adjuster can see exactly what left the property and why.

  • Plastic sheeting and negative air pressure before any removal starts
  • HEPA air scrubbers running from the first cut to the last wipe down
  • Moisture meters and a thermal camera to find the water behind the wall
  • Cleaners rated for mold on framing, block, and every hard surface we save
Clean room after mold remediation completed
What about the alternatives?

Ways people deal with mold in a St. Louis home

Once the spots show up, advice comes at you from every direction. Here is how the common choices really work out.

Call our crew and have the moisture found first

We read the walls, floors, and framing, track the leak or the seepage that is feeding the growth, and shut the water off before anything else happens. Then we contain the room and clean it out to EPA and IICRC standard, so the same wall is not dark again by the end of summer.

Recommended

Fix the plumbing leak or the grading before anything else

A good move. It takes the fuel away, though the growth already inside the wall cavity still has to come out, and that part never fixes itself.

Acceptable

Bring in an outside company to test the air first

Useful when nobody can find the source, or when a tenant and an owner disagree about what is going on. Testing tells you what is there. It removes none of it.

Acceptable

Run a dehumidifier in the basement all summer

Smart for holding a dry space dry. On a wall that is already growing, it slows the spread a little without cleaning any of it up.

Acceptable

Spray bleach on the spots and paint over them

Bleach mostly sits on the surface while the water in it soaks into the wood. Paint hides the color for a few months. The growth keeps working behind it.

Skip

Wait and see whether the musty smell fades

That smell means something is still wet. Waiting only hands the mold more drywall, more trim, and more of the framing under your floor to feed on, and every week of it makes the removal bigger.

Skip
How it goes

From quote to walk-on, fast.

01

Your inquiry

Call or send the short form with what is going on at your place. A sentence or two is plenty for the first step.

02

We talk it through

We go over the situation on the phone, ask the questions that matter, and tell you what we would do next.

03

A clear plan

You get a plain-language rundown of the work, the order it happens in, and what to expect on the day.

04

The work gets done

Our crew shows up when we said, does the job, and walks you through the result before leaving.

Before you book

Straight answers about mold before you call

The same handful of questions comes up on nearly every mold call we take in St. Louis. Here are honest answers, with nothing dressed up.

Can I clean the mold myself?
A patch smaller than a sheet of notebook paper on a hard surface is fair game for a homeowner with gloves and a mask. Past that, the EPA suggests bringing in a crew, and there is a good reason for it. Cutting into a wall with no containment throws spores across the whole floor of the house. We seal the room first, so the mess stays in one place and leaves with us.
Do I need a mold test before the work starts?
Often you do not. Growth you can see plus a wall you can measure as wet is already the answer, and the cleanup is the same either way. Testing earns its keep when the smell is there but nobody can find the source, when a sale or a lease is on the line, or when someone in the house keeps getting sick and you want a record of it. We will say plainly which of those you are in.
How fast does mold grow after a leak?
Fast. Give it damp material and a warm room and growth can start inside a day or two. A St. Louis July hands it everything it wants. That is why we push to dry a wet basement right away instead of letting it sit through a weekend.
Will my insurance cover mold remediation?
Sometimes, and it usually turns on what caused the water. A supply line that burst last night gets treated very differently from a slow drip nobody noticed for a year. Many policies also cap what they will put toward mold, so it is worth reading your declarations page early. We document the loss with photos, moisture readings, and a written scope, which is what your adjuster is going to ask for.
Do we have to move out while you work?
Usually not. The plastic and the negative air keep the work inside the rooms we are treating, so the rest of the house stays fine to live in. If the growth is heavy, if it reached the ducts, or if it sits in the only bathroom you have, we will tell you straight that a couple of nights elsewhere is the better call.
How do I know the mold is really gone?
Because the material that held it is out of the house, the surfaces we kept were cleaned and treated, and the framing reads dry on a meter rather than dry to the touch. We can also arrange clearance testing when you want another set of eyes on it. Then we walk the space with you and show you what we found, what came out, and what we did about the water behind it.
Aftercare

Keeping mold from coming back

Mold needs water. Take the water away and it has nothing to live on, which is why the habits below matter far more than any spray you can buy at the store. Summers here run humid and spring storms come hard, so basements and crawl spaces are worth a look every few weeks. A little attention through the year beats a second cleanup.

  • Hold basement humidity near fifty percent with a dehumidifier that drains on its own
  • Clean the gutters twice a year and run the downspouts well away from the foundation
  • Grade the soil so rain runs off the house instead of pooling against the wall
  • Leave the bathroom fan on through the shower and for ten minutes after
  • Check under sinks, behind the washer, and around the water heater about once a month
  • Dry any spill, overflow, or seepage inside a day, and skip carpet on a basement floor that takes on water
Mold growth on drywall after water damage
Before and After: St. Louis Mold Jobs
FAQ

Mold Remediation Questions St. Louis Homeowners Ask

How fast can you get to my St. Louis home?
Our line is open at any hour, including the nights when a line of storms puts half the metro on the phone at once. We will not give you a minute count we cannot keep. We will tell you when a crew is leaving, and get your water shut off before we hang up.
What do I do before you get here?
Shut the main if you can reach it dry. Keep away from the panel, and from outlets under water. Photograph everything before it gets moved, and lift furniture off soaked carpet where you can.
Do you work with insurance?
We put together the file adjusters look for. Daily moisture logs, photographs by room, and a scope listing what came out and what stayed and got dried. We deal with the adjuster directly so you are not translating. Whether it is covered is your carrier's call, and not something we will pretend to know.
How long does drying take?
Typically three to five days. A lot of housing here is brick with plaster inside, and both hold water longer than modern drywall over wood framing, so those can add a day or two. We meter it daily against the IICRC dry standard and pull equipment on the readings.
Will mold show up later?
Roughly 24 to 48 hours of wet material is where that starts. Dry it inside that window and you generally never see it. That is why we would rather set equipment tonight than in the morning.
Ready when you are

Let's make your next steps easier

Tell us what is going on at your St. Louis home and we will walk you through the options. One call or one short form is all it takes.

Call (314) 597-7468Make your inquiry
CallContact us