How Long Does Mold Remediation Take? Texas Timeline

The table below shows the main stages of a licensed Texas project and the time rules attached to each. The legal minimums come from TDLR's mold rules (16 TAC chapter 78). Stages with no legal deadline vary with the job.

Texas mold remediation timeline: stages and legal time rules

Rebuilding (new drywall, paint, flooring) usually comes after clearance and is a separate job with its own schedule.

Fixr says remediation takes a few hours to several weeks, depending on the amount of mold, what caused it, and the level of damage. We couldn't find a reliable source that breaks this down by room or square footage, so treat any precise day count you see online with caution. What clearly pushes a job longer:

• Size of the affected area. Bigger areas need more containment, more material removal and more cleaning.
• Where the mold is. Bob Vila notes that crawl space work takes longer and costs more in labor. Attics, HVAC systems and wall cavities tend to slow things down too.
• Whether the water problem is fixed. The mold won't stay gone if the leak keeps going. A Texas clearance check must confirm, to the extent feasible, that the cause is fixed so that it is "reasonably certain that the mold will not return." If plumbing or roof work is needed first, that adds time.
• Drying. Fixr warns that if moisture isn't dried first, spores could recolonize the area within a few days.
• Failing clearance. If the area doesn't pass the final check, the contractor has to redo work and the consultant re-inspects.

Our mold remediation process guide explains what happens inside each stage.

If a licensed company is doing your job, these steps are required and several have fixed timing.

Step 1: Assessment by a licensed testing company

A licensed mold assessment consultant or technician inspects the home. Under Texas law, the testing company and the removal company must be different: a license holder may not perform both mold assessment and mold remediation on the same project. See why testing and removal are different companies.

Sampling is optional in many cases. TDLR's consumer sheet says samples may be taken, however, sampling is not necessary in many cases. If samples are taken, they must be analyzed by a laboratory licensed under §78.62, and you'll wait for lab results before the protocol is final.

Step 2: The protocol (at least one day before work)

The consultant writes a remediation protocol that is specific to each remediation project. It spells out the areas, methods, containment and clearance criteria. You must receive it at least one calendar day before remediation activities begin.

Step 3: The work plan (at least one day before prep)

The remediation contractor turns the protocol into a work plan and must give it to you at least one calendar day before the mold remediation preparation work begins.

Step 4: TDLR notification (five days ahead for larger jobs)

When the mold affects a total surface area of 25 contiguous square feet or more, the remediation contractor must notify TDLR no less than five calendar days before the anticipated start date.

This is often the step that sets the earliest start date. A few related rules:

• Moving the start earlier requires a new notice at least five calendar days before the new date, unless the emergency provision applies.
• In an emergency, where waiting would make contamination worse after water damage, notice is due as soon as practicable but not later than the following working day after the licensee identifies the emergency.
• If the stop date slips by more than one workday, stop-date changes of more than one workday require an amendment.

Jobs under 25 contiguous square feet don't trigger notification. Texas law also lets anyone remediate less than 25 contiguous square feet without a license, which is why small jobs can move faster.

Step 5: The remediation work

The crew sets up containment, removes or cleans moldy materials, and cleans the area. Duration varies, as above. The contractor must keep the work plan, protocol and a list of workers on site for the project's duration.

Step 6: Clearance testing

When the work is done, a licensed assessment consultant checks that the area is free from all visible mold and wood rot, that the protocol and work plan were followed, and that the clearance criteria were met. If walk-in containment was used, this happens while it's still up. The contractor can't take containment down until it gets written notice from a licensed mold assessment consultant that the project achieved clearance.

The rules set no day count for scheduling clearance, so ask both companies how soon after the work the consultant can come out. If the check includes air or surface samples, lab turnaround adds time. If visual problems are bad enough to fail clearance, analytical methods are not required, and the contractor goes back to work.

More detail in our mold clearance testing guide.

Step 7: Certificate within 10 days

The Certificate of Mold Damage Remediation (CMDR) and the required photographs are due not later than ten calendar days after the project stop-date. The statute says the same: the license holder must provide it within 10 days after finishing remediation.

Keep it. TDLR explains that a certificate showing the cause was fixed prevents an insurer from making an underwriting decision on your home based on the previous mold damage. And if you sell within five years, you must give the buyer a copy. Our guide to mold inspection before buying a house explains that rule.

Often, yes, but it depends on the job. Fixr answers the question "Can you live in a house during mold remediation?" with "In most cases, yes," because the area is sealed off and air scrubbers help remove spores.

Bob Vila says it depends on the scope of the remediation, and that when mold affects several areas or a main living area, residents may find it more convenient to stay elsewhere.

The EPA's guidance for larger buildings says a remediation plan may include temporary relocation of some or all of the building occupants, weighing the size of the area, health effects occupants report, and expected disruption. It also advises a more cautious approach when sensitive individuals (e.g., those with severe allergies or asthma) are present.

Factors that point toward staying or leaving during remediation

The CDC notes that people with asthma or who are allergic to mold may have severe reactions, and that immune-compromised people and those with chronic lung disease can get lung infections from mold. If anyone in your home falls in those groups, ask their doctor before deciding. A doctor, not a mold test, diagnoses mold-related illness.

Whatever you decide, stay out of the containment area. It's a work zone, not part of the house, until clearance passes.

• Fix the water source early. Plumbing or roofing repairs often have to happen before or alongside mold work.
• Dry fast after a leak or flood. The EPA says to dry water-damaged areas and items within 24-48 hours to prevent mold growth. After a flood, Texas A&M AgriLife warns that mold can form in as little as 2-3 days if materials stay damp.
• Book the testing company for clearance up front. You hire it separately from the removal company, so line up dates for both.
• Check licenses before you sign. Use our license check tool or TDLR's search. TDLR says only a licensed remediator is authorized to give a CMDR, so unlicensed work means no certificate at the end.
• Talk to your insurer early if the damage came from a sudden leak. See does insurance cover mold.

To get started, find a mold testing company for the assessment and a separate mold removal company for the work. We list both for Houston, Dallas, Austin, San Antonio and other cities on our Texas page. Budgeting too? See mold remediation cost.