Post-Flood Mold Remediation in Texas: What to Do Step by Step

After a flood in Texas, mold remediation starts with drying everything out within 24–48 hours, treating floodwater as contaminated, and hiring a TDLR-licensed contractor for any job over 25 square feet. Standard homeowners insurance typically does not cover flood damage, and Texas landlords have specific disclosure and repair obligations once flooding has occurred. Acting fast and knowing the legal requirements protects both your health and your claim.

What's the first thing to do after a flood, before remediation starts?

Document everything before you touch anything. Photograph and video every affected room, wall, floor, and piece of furniture — this record is essential for insurance claims and any contractor negotiations later. Then shut off electricity to flooded areas if it's safe to do so, and avoid wading into standing water that may be electrically charged or biologically contaminated.

Once damage is documented, the clock starts on the single most important fact in this entire process: drying time.

How fast does mold grow after flooding in Texas?

The EPA and CDC both set the same benchmark: if wet or damp materials are dried within 24–48 hours of a leak or flood, mold growth is largely preventable. Miss that window, and porous materials — drywall, carpet, insulation, upholstery — usually cannot be fully cleaned and need to be discarded rather than remediated. In Texas, Gulf Coast humidity and heat compress that window further, especially in attics, crawl spaces, and HVAC systems, where trapped moisture accelerates growth.

Flood water itself is treated differently than a clean pipe leak. Under the IICRC S500 standard, floodwater is generally classified as Category 3 — grossly contaminated water that may carry sewage, chemicals, or bacteria. That reclassification changes the required PPE, cleanup methods, and disposal rules, and it's a major reason a DIY bleach-and-fan approach that might work for a small clean-water leak isn't appropriate after a flood.

Do you need a licensed contractor for mold remediation in Texas?

It depends on the size of the job and the type of property. Texas regulates mold work under Occupations Code Chapter 1958 and 16 TAC Chapter 78, through the Texas Department of Licensing and Regulation (TDLR). A homeowner performing remediation on their own property is exempt from licensing if the contaminated area is under 25 contiguous square feet.

That exemption disappears quickly, though:

• Rental properties and commercial buildings require a licensed contractor regardless of the affected square footage.
• Any project over 25 square feet requires a licensed Mold Remediation Contractor (MRC), even for owner-occupied homes.
• Hiring outside labor for any size job generally triggers the licensing requirement.

Given that flood damage routinely exceeds 25 square feet and often involves multiple rooms, most post-flood remediation in Texas legally requires a licensed contractor. You can find a licensed contractor near you or browse the full Texas mold remediation directory to compare options.

What are the TDLR rules a licensed remediator must follow?

TDLR licenses four categories of mold professionals: Mold Assessment Consultants (MAC), who inspect and write reports; Mold Assessment Technicians (MAT), who work under a MAC's supervision; Mold Remediation Contractors (MRC), the company-level license required for paid remediation work; and Mold Remediation Workers (MRW), a registration for field labor.

A few requirements matter directly to homeowners:

• Conflict-of-interest rule: the same company (or an owner with financial interest in both firms) cannot both assess and remediate the same project — this keeps inspection and cleanup findings independent.
• 5-day advance notice: remediators must notify TDLR at least five days before starting work, except in declared emergencies.
• 10-day certificate: after finishing the job, the remediator must give the property owner a certificate of mold remediation within 10 days.
• Consumer Mold Information Sheet: licensed assessors and remediators are required to hand this document to the client before work begins.
• $1 million liability insurance minimum: licensed mold companies must carry at least $1 million in commercial general liability coverage per occurrence.

Does homeowners insurance cover flood-related mold damage in Texas?

Usually not, and this is the most common surprise for Texas flood victims. Standard homeowners insurance excludes flood damage entirely — flood coverage requires a separate NFIP or private flood policy. Even where a policy does apply, most Texas homeowners carry HO-A policies, which typically only cover sudden, accidental water events, not damage from prolonged moisture or repeated leakage — and many either exclude mold remediation outright or cap it at a low dollar limit.

The Texas Attorney General's Consumer Protection Division advises homeowners to review any remediation bid with their insurer before work starts, and to confirm the bid and payment schedule satisfy any mortgage lender's requirements. For coverage questions specific to your policy, the Texas Department of Insurance is the state resource to check.

What are renters' rights after flood-related mold in Texas?

Texas Property Code Chapter 92 doesn't mention mold by name, but Section 92.052 requires landlords to repair conditions that materially affect a tenant's health or safety — courts have applied this to mold. Landlords generally have about 7 days after written notice to make repairs, though