Call whoever can stop the water first. If a pipe is still leaking, that is a plumber. If a roof is still dripping, that is a roofer. Once the water is off, a water-restoration company dries the structure. An independent mold assessor maps what is already growing and writes the scope. A mold remediator removes contaminated material. Do not hire the same company to inspect and then remediate the same house in Florida, Texas, or New York. That conflict is illegal there, and it is a bad idea everywhere else.
The EPA’s home guide is the sequence in one sentence: “If you clean up the mold, but don’t fix the water problem, then, most likely, the mold problem will come back.” The first call is the trade that stops the leak. The mold calls come after.
These titles get used interchangeably on trucks and websites. They are not the same job.
| Who | What they do | What they do not do |
|---|---|---|
| Plumber, roofer, or HVAC tech | Stops the moisture: burst line, failed trap, roof leak, AC drain, bath fan | Does not map hidden mold or write a remediation protocol |
| Water restoration company | Extracts standing water, sets dehumidifiers, dries to a moisture target (IICRC S500) | Drying is not mold removal. If growth is already on the drywall, restoration alone is not enough |
| Independent mold assessor (inspector) | Finds the water path, meters materials, samples if needed, writes a written protocol | Does not tear out walls or sell the cleanup. That is the point |
| Mold remediator | Builds containment, removes porous material, HEPA-cleans, dries, waits for clearance | Should not invent the scope or grade their own work |
A general contractor rebuilds after clearance. An insurance adjuster pays, or does not pay. Neither should be your only mold diagnosis.
If the confusion is the truck that showed up after a flood or burst pipe, read water damage restoration vs mold remediation. If a claim file is already open, see hiring during an insurance claim.
If the patch is small, on a hard surface, and the leak is already fixed, you may not need any of these people. EPA: “If the moldy area is less than about 10 square feet (less than roughly a 3 ft. by 3 ft. patch), in most cases, you can handle the job yourself.” That decision is on DIY or professional. This page is for jobs past that line, or where you do not yet know the size.
Work down the table. The first row that matches is the first call.
| What is happening | Call first | Then |
|---|---|---|
| Water is still coming in (pipe, appliance hose, roof, slab leak) | Plumber, appliance tech, or roofer | Restoration for drying if materials stayed wet |
| Standing water, a burst pipe, or a flood, and you are still inside the 24 to 48 hour window | Water restoration | Assessor only if you already see growth or the house stayed wet longer |
| Musty smell, stains, or visible mold, and you do not know how far it goes | Independent mold inspection | Remediator bidding against that report |
| You already have an inspection report that names materials and square footage | Licensed remediator | Independent clearance after the work |
| Sewage, toilet overflow, or outdoor floodwater | Restoration company experienced with contaminated water, then an assessor | EPA: “If the water and/or mold damage was caused by sewage or other contaminated water, then call in a professional who has experience cleaning and fixing buildings damaged by contaminated water.” |
| Growth at the air handler, a wet coil, or mold in a return | HVAC contractor plus an assessor | EPA: “Do not run the HVAC system if you know or suspect that it is contaminated with mold.” |
| You are a tenant | Landlord, in writing, with photos | See tenant mold rights. Do not hire demolition into a unit you do not own |
| You plan to file an insurance claim | Independent assessor for documentation, plus the carrier | Restoration if the event was sudden. See after a water leak |
The EPA’s drying window is why restoration comes before remediation on a fresh leak: “It is important to dry water-damaged areas and items within 24-48 hours to prevent mold growth.” Past that window, you are in a mold job.
Calling the remediator while the pipe is still open wastes the job.
The plumber or roofer owns the source. A supply line, shower pan, roof flashing, clogged AC condensate line, or failed water heater is a building trade. Until that is closed, every dollar spent on mold is temporary. EPA: “You must have completely fixed the water or moisture problem before the cleanup or remediation can be considered finished.”
The restoration company owns the water already in the house. These are the 24-hour trucks with extractors and dehumidifiers, working to IICRC S500. Right call in the first two days after a burst pipe. Wrong call as your only vendor if the drywall is already growing or the house has smelled musty for months.
The remediator owns the growth. Their standard is IICRC S520: containment, negative air, removal of porous material, HEPA cleaning, then verification. They should work from a protocol, not a sales walkthrough.
One company can hold restoration and remediation skills. That is common. The problem starts when that company also inspects, writes its own scope, and later clears its own work.
A mold inspection is a diagnosis. Remediation is the treatment. The same company should not do both on your house. Three states wrote that into statute.
Florida. Statute 468.8419 bars a mold assessor from any attempt to “Perform or offer to perform any mold remediation to a structure on which the mold assessor or the mold assessor’s company provided a mold assessment within the last 12 months.” The reverse is banned. Referral kickbacks are illegal.
Texas. Occupations Code 1958.155: “A license holder may not perform both mold assessment and mold remediation on the same project.” Common ownership of both companies on that project is also barred. A licensed assessor must confirm the work and the remediator must issue a Certificate of Mold Damage Remediation.
New York. The Department of Labor Mold Program describes its purpose as “Protection against fraud by prohibiting the performance of both the assessment and remediation on the same property by the same individual.”
Elsewhere it is still a conflict even when it is legal. EPA: “Check references and ask the contractor to follow the recommendations in EPA’s Mold Remediation in Schools and Commercial Buildings.” An independent protocol is how you make three remediators bid the same job. See mold laws.
A legitimate restoration visit after a leak is extraction, moisture mapping, and a drying plan, not a free inspection that ends in a five-figure remediation contract before anyone has metered the walls.
Watch for these swaps:
If the leak is fresh and you are still inside 48 hours, hire drying. If the house has already grown mold, hire an assessor, then a remediator. The handoff is on after a water leak.
Call the inspector first when you can smell it but cannot see the edges, stains return after cleaning, you need a report for a landlord, buyer, or insurer, contractors are quoting different square footage, the HVAC may be involved, or someone in the house has asthma and you need a real map.
EPA warns that “Mold may be hidden in places such as the back side of dry wall, wallpaper, or paneling, the top side of ceiling tiles, the underside of carpets and pads, etc.” Opening those cavities without containment is how a closet problem becomes a whole-house problem. Expect $300 to $600 for a residential inspection with a written protocol. That document is what keeps the remediation honest.
Call the remediator when the scope is known: rooms, materials, square feet, containment, and who is fixing the water. Then get two or three bids against that paper.
EPA’s sizing is the containment decision:
| Visible mold | EPA containment | Typical first call |
|---|---|---|
| Under about 10 square feet, hard surface, water fixed | Often DIY | No contractor, or a handyman after you confirm it is surface growth |
| 10 to 100 square feet | Limited containment, single layer of 6-mil poly, negative air | Remediator, using an assessor’s protocol |
| Over 100 square feet, or likely to spread | Full containment, double poly, airlock | Remediator plus a plan for whether you stay in the house |
How you pick among bidders is a separate problem. Use how to choose a contractor for licenses, insurance, and the questions to ask.
A wet coil or mold in a return is an HVAC problem; do not run a contaminated air handler as a dryer. Attic mold is often a roof or bath-fan problem, so fix those before anyone bags insulation. Rebuild starts after clearance. If anyone is wheezing, see a physician. CDC: “People with asthma or who are allergic to mold may have severe reactions.”
The most expensive call I see is the first one to a company that does everything. They arrive, they “find” mold, they quote demolition, and three weeks later you still do not have a moisture source on paper.
Start with the leak. If you cannot name the trade that stops the water, or you cannot see the edges of the growth, you are not ready for a remediator. That is an inspector’s job, and it should be someone who does not sell the tear-out.
In Florida I will not assess a house and then send my own crew to remediate it. The statute forbids it, and the conflict was obvious long before the statute. Pay for the diagnosis once, then make remediators compete.
If water is still leaking, call a plumber or roofer. If the leak just happened and materials are wet but not yet moldy, call a water restoration company to dry the area within 24 to 48 hours, which is the EPA’s window. If you already see or smell mold and do not know how far it goes, call an independent mold assessor before a remediator.
An inspector (assessor) diagnoses the problem, measures moisture, and writes a protocol. A remediator contains the area, removes contaminated material, and cleans what stays. They are separate jobs. In Florida, Texas, and New York, the same company is not allowed to do both on the same property.
They can hold the skills, and many do both drying and remediation. They should not also inspect the house, write their own protocol, and then clear their own work. Hire drying for a fresh leak. Hire an independent assessor once mold is in the picture, then let remediators bid that scope.
Not on the same job in Florida (12-month bar), Texas (same project, including common ownership), or New York (same individual on the same property). In other states it may be legal and is still a conflict of interest. Use separate firms for inspection, removal, and clearance.
Yes if you cannot see the edges, if the HVAC may be involved, if you need documentation for insurance or a sale, or if contractors are quoting very different jobs. A small, obvious patch on a hard surface with a fixed leak is different. EPA’s 10 square foot guideline still applies there.
Plumber first if the water is still on. Restoration next if you are inside the 24 to 48 hour drying window. A mold company is the right call after that window, or as soon as you see growth. Cleaning mold while the pipe is open wastes the job.
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