Mold After Water Damage in Texas: How the TDLR Rules Work

How quickly does mold follow water damage in a Dallas house?

Fast enough that the drying schedule decides the outcome. The EPA advises drying water-damaged areas and items within 24 to 48 hours to limit mold, counted from when the material gets wet rather than when you notice. The agency calls that a guideline, not a deadline, and says mold may have grown even in materials that were dried inside 48 hours. A warm, closed-up house in Dallas County summer is close to ideal growing conditions.

Spores are already in every building. What they are missing is water, and a wet material supplies it: the paper facing on drywall, carpet pad, the cardboard back of a cabinet, dust on a cold surface, insulation that matted down. None of those materials look dramatic while they are wet, which is why so many mold jobs in Dallas start as a leak somebody toweled up and closed the door on.

The slab is what slows the drying here. Water on a slab floor spreads sideways, soaks the pad and wicks up the bottom few inches of drywall, and concrete releases that moisture slowly for days afterwards. A room can feel dry underfoot while the wall plate behind the baseboard is still wet, and that is where growth begins out of sight.

There is no way to shorten the biology, only the wetness. That is the honest case for calling early: extraction, airflow and dehumidification inside the first day or two give you the best odds of avoiding a mold problem, and a moisture reading days later, not the calendar, is what shows whether the materials are really dry. Dallas Water Damage Restoration answers the phone at any hour on (833) 490-5225, and a crew is dispatched as fast as one becomes available.

What do the 25 square feet and 10 square feet numbers actually mean?

They come from two different places. Twenty-five contiguous square feet is the Texas licensing threshold for mold remediation. About 10 square feet is the EPA's rule of thumb for what a homeowner can usually clean up themselves. One is law about who may do the work; the other is guidance about whether you should.

Contiguous is the word doing the work in the Texas number. A license is not required to remediate mold where the contamination affects a total surface area of less than 25 contiguous square feet, and once the affected area reaches that size the exemption stops applying. Four separate hand-sized spots in four rooms are not 25 contiguous square feet; one patch running behind a wall from the dishwasher to the pantry can be.

Owners have their own exemption, and it is broader than people expect. In the home you own, sampling and cleaning mold need no license at all, and the exemption reaches further than that: an owner, a managing agent or an employee is outside the licensing requirement on a residential property until that property has 10 or more residential dwelling units. A landlord with a duplex in Lakewood and East Dallas and a landlord with a 60-unit complex in Garland are therefore in different positions on the same problem.

Measuring matters more than guessing, because the number changes who is allowed to be in the room. That is why a moisture map and a measured affected area come before anyone quotes containment, and why a quote that never mentions an area in square feet is hard to assess.

Why must the company that tests the mold be different from the one that removes it?

Because Texas separates the two roles. A license holder may not perform both mold assessment and mold remediation on the same project, and may not own an interest in both the assessing and the remediating company on that project. The assessor writes the protocol and later checks the result; the remediation contractor does the work.

Think of it as a specification and a build. A licensed mold assessment consultant inspects, maps moisture, decides how far the contamination reaches and writes a remediation protocol that says what has to be contained, removed, cleaned and dried. A licensed mold remediation contractor then prices and performs that protocol, and is measured against it rather than against its own opinion of what was needed.

The practical effect for a homeowner is a filter on marketing. If a company offers to test your mold and then remove it as one tidy package on a job at or above the licensed threshold, something is wrong with the offer, whatever the website says. On smaller jobs the licensing requirement does not bite, but the conflict of interest is identical, so it is still worth knowing who benefits from the answer.

You can check any mold license with TDLR before work starts, and TDLR takes complaints on 1-800-803-9202. The Texas Attorney General's consumer protection pages also carry a mold remediation guide written for homeowners rather than contractors. None of this is adversarial: a good assessor and a good remediator work this way as a matter of routine.

• Ask which TDLR license type each company holds for your job, and look it up yourself.
• Ask for the affected area in contiguous square feet, in writing.
• Ask who will perform the post-remediation check, and confirm it is not the removal contractor.
• Ask what is being done about the leak, because mold work on a wall that is still being wetted will fail.

What paperwork should you be holding at the end of a licensed mold project?

Three things. A consumer mold information sheet before any mold-related activity begins, the remediation protocol before the project begins, and a Certificate of Mold Damage Remediation not later than 10 calendar days after the project stop date, on a form adopted by the Texas Commissioner of Insurance.

The certificate is the document people wish they had kept. It carries a statement by a licensed assessor, not by the remediator, that the mold identified for the project has been remediated as the protocol required. That is the difference between a contractor saying the job went well and an independent license holder saying the protocol was met.

It also follows the house. A buyer's inspector, a future insurer and the next contractor to open that wall all have reason to ask what happened, and a certificate plus the protocol answers in a paragraph what otherwise turns into a negotiation. Keep the drying log, the moisture readings and the before-and-after photographs in the same file.

Ask for electronic copies as well as paper. Ten days after the stop date is a long time in a household that has just moved back into a repaired room, and the file is easiest to assemble while everyone still remembers the sequence.

What can you handle yourself, and when should you stop?

A small patch on a hard surface in your own home is normally yours to clean. The EPA's rule of thumb is under about 10 square feet. Stop when the area is larger, when you cannot find or fix the water, when porous materials are involved, or when the growth comes back after cleaning.

Hard, non-porous surfaces clean up: tile, glass, sealed concrete, metal, finished trim. Porous materials do not, because the growth is inside them rather than on them, and carpet pad, insulation, ceiling tile, particleboard and the paper face of drywall are usually replaced rather than scrubbed. Deciding that honestly in your own bathroom saves repeating the job in six weeks.

Two mistakes do real damage. The first is aiming a box fan at visible growth, which moves spores and dust through the rest of the house instead of removing them. The second is painting over it; a stain-blocking primer hides the evidence and leaves both the growth and the water behind it in place. Leave the air-conditioning system off in a room with visible growth until someone has looked at it, since the return pulls that air into every bedroom.

Renters are in a different position again. The property owner, not the tenant, controls repairs to the plumbing, roof or air handler that is causing it, so report it in writing with photographs and a date rather than cleaning it quietly. Mold can trigger allergy and asthma symptoms in some people, so if someone in the house has asthma or is being treated for a respiratory condition, let them stay out of the room while you work and keep the door shut.

• Fix or isolate the water first, even if that just means shutting a fixture valve and putting a bucket under it.
• Wear gloves, eye protection and a well-fitting dust mask, and ventilate to the outside rather than into the hallway.
• Bag porous material before carrying it through the house.
• Stop and get help if the patch is larger than you thought once you open it up, or if it returns.

Does Texas homeowners insurance pay for mold removal?

Sometimes, and it depends on the cause and your policy. Most Texas homeowner policies cover sudden and accidental water damage, such as a burst supply line, while gradual leaks and seepage usually are not covered, and mold resulting from flood generally falls outside a standard policy. Coverage is decided by your insurer.

The cause is the hinge. A washing-machine hose that let go on Tuesday is a different claim from a cabinet base that has been damp for two years, even if the mold looks identical, because policies are written around sudden events rather than deterioration. Slab and under-slab leaks are their own conversation, and the right move is to ask your agent how your policy treats a leak under the slab before you need the answer.

Document as though coverage is in doubt, because it often is. Photographs before anything moves, an inventory of what was discarded, the measured affected area, the protocol and the drying log make a file an adjuster can work from. The crew can document the damage for your claim, and what gets paid is the insurer's decision under your policy.

One rule is not negotiable. Texas Insurance Code Chapter 707 makes the policyholder responsible for the deductible, and it is illegal for a contractor to offer to waive, rebate, absorb, credit or offset it or to help you avoid paying it. A contract of $1,000 or more tied to an insurance settlement must carry written notice that you pay the deductible, and your insurer may ask for proof that you did. The Texas Department of Insurance can help with claim questions and complaints.

What does mold work cost around Dallas?

An assessment with moisture mapping typically runs a few hundred dollars, small contained removals land in the hundreds to low thousands, and a licensed project with full containment, a protocol and a clearance check runs into the thousands. The water work that can head off the job is almost always the cheapest line on the page.

Size, materials and access drive the number more than the mold does. A contained patch of wall board in a hallway is a short job; the same square footage spread across cabinet bases, a tiled floor and an attic ceiling means three separate containments, three material types and more days of equipment. Contaminated water, old materials and occupied rooms all add time.

The ranges below are estimates for Dallas County in 2026 and not a price list. The emergency-stage price for extraction and the drying setup is explained and approved before work starts, and repair work after drying is quoted separately. Lab fees for samples are set by the laboratory, not by whoever collects them.

Read the table in the right order: the bottom rows are what the top rows are for. Fast drying is the cheapest way to try to stay out of the licensed-project column, and it improves the odds without guaranteeing them.

When do you not need a mold company at all?

When the problem is ventilation or housekeeping rather than a building that got wet. Surface mildew on bathroom grout and on a shower ceiling in a room with a weak exhaust fan is a cleaning and airflow problem. So is the black ring in a window track. Neither needs an assessment or a containment.

Smells mislead people in the same way. A musty draft from a hallway vent in July is often a dirty evaporator coil or a condensate pan that has not drained, and a sour smell from a rarely used bathroom is usually a dried-out floor drain trap that a cup of water will fix. Those are maintenance calls, not mold projects, and anyone who quotes a containment before looking at the air handler has skipped a step.

Equally, a leak you caught the same hour is often finished. If a supply line dripped onto sealed tile, you dried it that afternoon and the baseboards and cabinet bases read dry a few days later, there is probably nothing to remediate and no reason to pay for a test to prove it. Keep an eye and a nose on the spot for a few weeks anyway, because dry readings do not guarantee that no mold grew, and a test would only confirm what a moisture meter already said.

Call when the signals point into the structure rather than onto it: a stain that grows after rain, a soft or sagging ceiling, a dark band along the bottom of drywall, warped or cupping flooring, a smell that strengthens when the air conditioning starts, or a leak you cannot locate. Those point to wet materials, and wet materials are where the mold inspection and drying work belongs. The slab leak guide covers the hidden-leak version of the same problem.