Mold Testing and Inspection in Keller, TX
Smell something musty or just finished a mold job? Call (844) 393-0214 for mold testing in Keller. We connect you with independent mold assessors. Ask for their TDLR license number and check it on tdlr.texas.gov. Assessors inspect, sample and confirm the work, separate from any company that removes mold.
- Independent licensed assessors
- Air and surface samples
- Post-remediation clearance
Talk to a local crew
One free call connects you with an independent restoration company that serves your address.
- Describe what happened
- Get connected to a local company
- Get a written estimate
Free referral line. We are paid by the companies we connect you with.
Do you need mold testing in Keller, or can you see the problem?
If you can see mold and know the cause, testing is often not needed to start cleanup. Testing helps when you smell mold but cannot find it, when a leak happened inside a wall, when someone at home has symptoms, before buying a home, and after remediation to confirm the area is clean.
Mold testing is part of a bigger service called mold assessment. In Texas, an assessor licensed by the Texas Department of Licensing and Regulation inspects the home, takes moisture readings, finds where mold is growing, and may take samples for a lab. For larger jobs, the assessor writes the remediation protocol that the removal company must follow.
The key point is independence. Texas law says the same license holder cannot do both the assessment and the remediation on the same project. An independent assessor has no reason to make the problem look bigger or smaller than it is.
Good reasons to test
- A musty smell with no visible source
- A past leak inside a wall or ceiling
- Allergy or asthma flare-ups at home
- Buying or selling a home
- Confirming a remediation job passed
What is the difference between air and surface mold testing?
Air sampling pulls a set volume of indoor air through a cassette to count spores, then compares it with an outdoor sample. Surface sampling uses tape lifts or swabs to identify mold on a specific spot. Air tests find hidden problems. Surface tests confirm what a visible stain is.
| Method | How it works | Best for | Limits |
|---|---|---|---|
| Air sample (spore trap) | Pump pulls air through a cassette; lab counts spores | Hidden mold, comparing rooms to outdoors, clearance | A snapshot; results swing with weather and activity |
| Tape lift | Clear tape pressed on a stain, sent to a lab | Confirming a spot is mold and what type | Only tells you about that spot |
| Swab | Sterile swab wiped on a surface | Rough or damp surfaces | Only tells you about that spot |
| Wall cavity sample | Air drawn from a small hole in the wall | Suspected growth behind drywall | Needs a small hole and careful reading |
| Moisture and thermal scan | Meters and infrared camera, no lab | Finding where water is feeding mold | Finds moisture, not mold itself |
General guidance. The licensed assessor chooses methods based on what the inspection finds.
Be careful with home test kits that grow mold in a dish. Mold spores are in nearly all indoor air, so a dish will almost always grow something. It cannot tell you how much is too much or where it is coming from.
What happens during a professional mold inspection?
A licensed assessor walks the home, asks about leaks and symptoms, checks moisture with meters and often a thermal camera, and looks at likely spots like baths, the laundry room, the attic and HVAC closet. They take samples if needed, send them to a lab, and give you a written report with findings and next steps.
- InterviewWhen the smell started, past leaks, roof or storm damage, and who feels sick.
- Visual inspectionUnder sinks, behind toilets, around windows, the water heater, attic AC drain pans and ceilings below upstairs baths.
- Moisture mappingMeters and thermal imaging show where water is still feeding growth.
- SamplingIndoor air samples plus an outdoor comparison, and tape or swab samples where useful.
- Lab resultsAn accredited lab counts and identifies spores, usually within a few days.
- Report and protocolA written report and, if remediation is needed, a protocol that lists work areas, containment, protective gear and clearance criteria.
Texas rules say the assessor must give you the remediation protocol at least one calendar day before remediation starts. Read it. It is the checklist the remediation company has to follow.
Musty smell you cannot find?
Call for a referral to an independent licensed mold assessor who serves Keller.
What is post-remediation clearance testing?
Clearance testing is the final check after mold removal. The independent assessor inspects the work area, confirms the protocol was followed, and often samples the air. If the area meets the clearance criteria, the containment comes down. If not, the remediator cleans again and the assessor retests.
- Step 1Visual checkNo visible mold or dust inside containment, and moldy materials are gone.
- Step 2Procedure checkThe assessor confirms containment, air filtration and cleaning matched the protocol.
- Step 3SamplingAir or surface samples, compared with clean areas and outdoors.
- Step 4Pass or redoPass means containment comes down. Fail means more cleaning, then a retest.
- Within 10 daysCertificateYou receive the Certificate of Mold Damage Remediation and before and after photos.
The assessor's statement on the certificate is based on visual, procedural and lab evaluation. The assessor may also note that the underlying cause, such as the leak, was fixed. Keep it. If you sell, Texas requires you to give buyers certificates from the past five years. For the removal side, see our mold remediation page.
How much does mold testing cost in Keller?
National cost guides put a mold inspection at about $450 to $800, with an average near $500. Air testing runs about $500 to $700, and extra samples often add $60 to $80 each. Clearance testing after remediation is a separate visit. Remediation itself usually runs $10 to $30 per square foot.
| Service | Typical range* | Notes |
|---|---|---|
| Mold inspection | $450–$800 (avg about $500) | Visual, moisture mapping, report |
| Air testing | $500–$700 | Indoor samples plus outdoor comparison |
| Extra samples | $60–$80 each | More rooms or wall cavities |
| Clearance testing | Separate visit fee | Required check on licensed remediation jobs |
| Mold remediation (for context) | $10–$30 per sq ft ($1,200–$9,000) | Done by a different licensed company |
*Estimates based on published national cost guides (Fixr mold inspection, Jan 2025; Fixr and This Old House mold remediation). Not a quote. Your assessor's written price is the real cost.
Many Texas policies exclude or limit mold testing unless you added coverage, according to the Texas Department of Insurance. If the mold came from a covered burst pipe, ask your adjuster whether testing is included. Read our insurance overview or the full cost table.
Where do Keller homes usually hide mold?
In Keller, hidden mold most often grows near attic AC drain pans, under sinks, behind washing machines, around water heaters, and in ceilings below upstairs bathrooms. Roof leaks from spring hail are another common source. An assessor checks these spots first, then follows moisture readings to anything else.
The hail storm on April 28, 2021, dropped stones up to 3.25 inches in Keller, and businesses reported roof and water damage. Roof leaks like that can wet attic insulation for months before a ceiling stain shows. Large homes in Hidden Lakes, Marshall Ridge and Highland Oaks often have more than one AC unit in the attic, which means more drain pans to watch.
When you call (844) 393-0214, we connect you with an independent assessor. We do not test or remove mold. Texas law bars one license holder from doing both on the same project, so confirm the two companies are separate.
Questions to ask a mold assessor
- What is your TDLR mold assessment license number?
- Are you independent of the remediation company?
- Which lab will analyze the samples?
- Will you take an outdoor comparison sample?
- Will you write the protocol and do clearance?
- How soon will I get the written report?
Mold testing in Keller and nearby cities
Companies in our network handle mold testing across Keller, ZIP codes 76248 and 76244, including Hidden Lakes, Marshall Ridge, Highland Oaks and Old Town, plus nearby cities in northeast Tarrant County. Call and you will be connected with a crew that serves your street.
Related water damage services
- Mold remediationContainment, removal and cleaning by Texas-licensed mold remediators.Read more
- Structural dryingAir movers, dehumidifiers and daily moisture readings until your home is dry.Read more
- Storm and flood damageHail roof leaks, wind-driven rain and rising flood water cleaned up and dried.Read more
Mold testing questions
How much does a mold inspection cost in Keller?
National cost guides put a mold inspection at about $450 to $800, with an average near $500. Air testing adds roughly $500 to $700, and each extra sample often costs $60 to $80. Larger homes, more rooms sampled and wall cavity samples raise the price. Ask for the full price, including lab fees, in writing.
Should mold testing be done before or after remediation?
Often both. Testing before remediation shows how big the problem is and gives the remediation company a protocol to follow. Testing after, called clearance, confirms the work area is clean before the containment comes down. On licensed Texas jobs, the independent assessor's sign-off is part of the Certificate of Mold Damage Remediation.
Why can't the mold removal company also test for mold?
Texas law says a license holder may not perform both mold assessment and mold remediation on the same project. The rule protects you from a company that finds a big problem and then gets paid to fix it, or grades its own cleanup. Hire an independent assessor, then a separate licensed remediator.
Are DIY mold test kits worth it?
Usually not. Mold spores are in almost all indoor and outdoor air, so a settle-plate kit will grow something nearly every time. It cannot tell you how many spores are normal, compare indoor air with outdoor air, or find where mold is hidden. A licensed assessor uses calibrated pumps, an outdoor baseline and an accredited lab.
How long do mold test results take?
The inspection itself usually takes one to three hours for a typical home. Lab results for air and surface samples often come back in a few business days, and many labs offer faster service for an added fee. The assessor then sends a written report that explains the results and next steps.
Does insurance pay for mold testing in Texas?
Sometimes. The Texas Department of Insurance says mold cleanup and testing are often excluded or limited unless you bought added coverage. If the mold came from a covered sudden water event, like a burst pipe, ask your adjuster whether testing is part of the claim. Keep the assessor's report and invoice either way.
Get an independent mold assessment
Call for a free referral to a licensed mold assessor who serves Keller 76248 and 76244.