Mold After Water Damage in Texas: What TDLR Rules Mean for You

How soon after water damage can mold start, and what does the EPA actually say?

The EPA advises drying water-damaged areas and items within 24 to 48 hours to prevent mold growth. That is a guideline, not a deadline. Mold can begin growing in damp materials during that window, and materials that appear dry can still hold moisture, so drying in time does not prove that no mold grew.

The 24 to 48 hour figure comes from the EPA's mold guidance, and it is widely repeated. It is a useful target: the sooner water is removed and materials are dried, the less opportunity mold has to take hold. It is also easy to misread. It does not say mold begins at hour 48 and not before, and it does not say that anything dried by then is safe.

Several things stretch the real timeline. Humid Texas weather slows evaporation. Water trapped behind baseboards, under flooring or inside a wall cavity can stay wet while the surface feels dry. Wet insulation in an attic can stay damp for days. A leak that nobody noticed for a week had a long head start before anyone started drying. In each case mold may have grown even if the materials were later dried, and the right response is to look, not to assume.

What does help is speed and measurement. A crew uses moisture meters and a thermal camera to find wet material, sets air movers and dehumidifiers, and re-checks readings until the materials reach their dry goal. That lowers the risk. It does not turn a guideline into a guarantee, and a crew that promises a mold-free outcome is promising something nobody can.

How do you know whether you have mold after water damage?

Look for visible growth, staining, a persistent musty smell, peeling paint or bubbling drywall, and moisture that does not go away. Mold can trigger allergy and asthma symptoms in some people. Smell and sight are clues, but only a licensed assessor can confirm the extent, and testing alone does not say how much needs removing.

Visible mold looks like spots or fuzzy patches in colors from white to green to black, often on drywall, ceiling tiles, baseboards, the underside of carpet pad or the face of insulation. A musty odor in a room with no visible growth can mean mold behind a wall or above a ceiling. Staining that comes back after painting means moisture is still reaching that spot.

Be careful with the idea that one color is dangerous. The CDC calls the term toxic mold inaccurate, and color does not tell you much about risk. What matters is the amount of growth, where it is, and who is exposed. Mold can trigger allergy and asthma symptoms in some people, particularly children, older adults and anyone with respiratory conditions, so if someone in the home reacts, treat it as a reason to act, not a reason to panic.

Home test kits and air samples are tempting but limited. A sample can show that spores are present, which they are in most indoor air to some degree, but it does not map the problem or write a plan. In Texas, a licensed mold assessor inspects, may take samples and, for jobs at or above the licensing line, writes the protocol that a separate remediation contractor then follows.

What does Texas law say about who can assess and remove mold?

Under Texas Occupations Code Chapter 1958, TDLR licenses mold assessors and mold remediators. A license is not required for remediation affecting less than 25 contiguous square feet. At 25 or more, a licensed remediation contractor follows a protocol written by a licensed assessor, and one license holder may not do both on the same project.

Texas regulates mold work more tightly than many states. The Texas Department of Licensing and Regulation administers the program under Chapter 1958 of the Occupations Code and its rules. Section 1958.102 sets the threshold: a license is not required to perform mold remediation where the contamination affects less than 25 contiguous square feet for the project. At or above that size, the work is done by a licensed mold remediation contractor following a written mold remediation protocol prepared by a licensed mold assessment consultant.

The conflict-of-interest rule is in Section 1958.155. It says a license holder may not perform both mold assessment and mold remediation on the same project, and a person also may not hold an interest in both the entity that assesses and the entity that remediates on the same project. The reasoning is straightforward: the person who decides how much mold there is and what must be done should not profit from removing it. Accounts of the law's history say the regime came in 2003 after the Ballard v. State Farm verdict exposed conflicts of interest in the industry, specifically firms inflating findings at inspection to win the removal work.

What are an assessment, a protocol and a clearance?

An assessment is a licensed assessor's inspection of the mold and moisture, including where it is, how far it spreads and why. The protocol is the written plan for removal. Clearance is the follow-up check, after the remediation, that the work met the protocol. The assessor and the remediator are different license holders.

An assessment starts with a visual inspection and moisture mapping, often with a moisture meter and sometimes with samples. The assessor looks for the source of the moisture too, because removing mold without fixing the leak or the humidity problem only buys time. For jobs at or above the licensing line, the assessor writes the mold remediation protocol: the scope, the containment, the methods and the criteria that will show the work is done.

The remediation contractor then carries out that protocol. Containment, negative air machines, protective gear, removal of affected porous materials and cleaning of surfaces are typical elements, though the protocol governs the details. After the work, a clearance check is done, and the owner receives a certificate of mold damage remediation when the job meets the requirements. Because the assessor is independent of the remediator, the clearance carries weight a self-check does not.

How do restoration, assessment and remediation fit together after a leak?

Water restoration comes first: stop the source, extract water, remove wet materials and dry the structure to its dry goal. If mold is suspected or found, a licensed assessor inspects, and if the job is at or above the line, a different licensed contractor remediates. Repairs follow once the area is dry and cleared.

A water event is a sequence. First the water is stopped and removed. Then wet materials that cannot be dried, such as saturated carpet pad and soaked drywall, come out, and air movers and dehumidifiers dry the rest. Moisture readings are taken on each visit until they reach the dry goal. See structural drying for how that works.

If mold shows up during that work, the roles diverge. A restoration crew can tell you what it sees and recommend that you have it assessed, and it should not be the one writing your protocol. If the affected area is under 25 contiguous square feet, a license is not required for the removal, and you may choose to clean it yourself if it is small, or hire help. If it is larger, you need a licensed assessor and a licensed remediation contractor who are not the same license holder.

What does mold work cost, and what questions should you ask?

On this site's working estimates, a mold inspection and assessment runs about $250 to $650, a lab sample about $75 to $175, small remediation under 25 contiguous square feet about $500 to $2,000, and large remediation with full containment about $3,000 to $12,000 or more. They are estimates confirmed on site, and the assessor and remediator price separately.

These ranges describe what a licensed Texas mold professional typically charges in the south Dallas-Fort Worth area in 2026. They are unsourced working estimates, not a price list, and the final price depends on how much area is affected, the materials, access, the containment needed and the number of days. Attics are a common location for larger jobs. This site does not claim to hold a TDLR license, and the assessor and the remediator on a project are separate companies priced separately.

Before you hire anyone for mold, ask for the TDLR license number and check it with TDLR. Ask which role they are playing, assessor or remediator, and confirm they are not doing both on your project. Ask to see the written protocol and the scope before work starts, and ask how clearance will be done and by whom.

What should you do right now if water got into your home?

Stop the water, remove standing water and start drying the same day. Photograph the damage, call your insurer and open windows or run fans only if the air outside is dry. Do not paint or cover wet areas. If you see or smell mold, have it assessed. Call (833) 490-5225 for water removal and drying.

Speed still matters, even though the 24 to 48 hours is a guideline. Shut off the water, remove what you safely can, and get air moving. Remove wet carpet pad and soaked porous materials, which are hard to dry in place. Do not seal wet drywall under paint or cover it with new flooring, because that traps moisture.

If the water was sewage or flood water, treat it as Category 3 and leave the cleanup to professionals. If you suspect mold already, avoid disturbing it. Sweeping or sanding can spread spores, and a licensed assessor can tell you how large the problem is. A crew is dispatched as fast as one is available, and the emergency-stage price is explained and approved before work starts.