Mold cleaning in Houston starts with one honest question: is this a spot on the surface, or is it growing inside the material? The answer decides whether a wipe-down is enough, whether drywall or carpet has to come out, or whether the job is big enough that Texas rules call for licensed professionals.
This page helps you tell those apart. It does not give cleaning recipes. Water Damage Pro Houston itself never touches mold; it is a free number, and your call is transferred to an independent, locally owned restoration company in greater Houston, which looks at the mold, gives you its own quote and does any work you agree to.
Mold cleaning, mold removal and mold remediation: the difference
Searches for mold removal in Houston and mold cleaning in Houston often mean the same worry, but the work behind those words is not the same. This table shows how the three usually differ.
| Cleaning | Removal | Licensed remediation | |
|---|---|---|---|
| What it means | Mold is cleaned off a hard surface that it has not grown into | Mold-damaged material is cut out and thrown away | A planned project under a consultant's protocol, with containment and a clearance check |
| Typical surfaces | Tile, glass, sealed countertops, metal | Drywall, ceiling tile, insulation, carpet and pad | Any of these, across a larger area or several rooms |
| Texas license | Not needed in most cases under 25 contiguous square feet | Depends on the size and who does it | When hired out at 25 contiguous square feet or more, generally a licensed consultant plus a separate licensed contractor |
| Paperwork | None required by Texas in most small cases | Ask for a written scope and invoice | Protocol, work plan, TDLR notice, clearance report and a Certificate of Mold Damage Remediation |
These labels are not legal categories, and companies use them differently. What counts is how much mold there is, what it is growing on and who is doing the work. If a company offers "mold removal" for what is clearly a large area, ask whether it will follow the licensed remediation process described on the mold remediation page.
Where Texas draws the line: 25 contiguous square feet
The Texas Department of Licensing and Regulation (TDLR) licenses mold assessment and mold remediation. Its guidance says that in most cases visible mold covering less than 25 contiguous square feet can be cleaned by people who are not licensed. Contiguous means connected: one patch measuring five feet by five feet reaches 25 square feet, while scattered dots on different walls are measured separately.
At 25 contiguous square feet or more, larger jobs generally call for a licensed mold assessment consultant to write a remediation protocol and a separate licensed mold remediation contractor to carry it out. The license holder must notify TDLR at least 5 days before such a project begins, and only licensed work earns the Certificate of Mold Damage Remediation that Texas buyers and insurers look for.
There is an exemption that matters to Houston homeowners. Owners or managers of residential property with fewer than 10 dwelling units do not need a license to do assessment or remediation on that property, and TDLR says a homeowner can sample or clean mold in their own home without a license. That exemption covers you working on your own house. It does not license a handyman, a painter or a cleaning service to do mold remediation for you as a business.
Check the mold license first. In Texas, mold assessment and mold remediation are licensed by the Texas Department of Licensing and Regulation (TDLR). In most cases visible mold under 25 contiguous square feet can be cleaned by people without a license; larger jobs generally call for a licensed mold assessment consultant to write the remediation protocol and a separate licensed mold remediation contractor to do the work. Ask for both license numbers and look them up on the TDLR license search (opens in a new tab). The line does not check licenses for you.
The EPA uses a smaller yardstick for its own advice. It says that if mold covers more than about 10 square feet, or there has been significant water damage, homeowners should consult its longer remediation guide, which was written for schools and commercial buildings but applies to other buildings too. Put the two together and the practical message is simple: the bigger and wetter the problem, the more it needs a professional plan.
Signs a mold spot is bigger than it looks
What you can see is often the edge of the problem. The EPA lists places mold hides, such as the back side of drywall and wallpaper, the top of ceiling tiles and the underside of carpet and pad. These clues suggest more is going on behind the surface.
A musty smell with no visible source
The EPA says damp or musty odors suggest water is or was present and mold growth is likely. A smell that is strongest near a wall, closet or cabinet base points to hidden growth.
Stains, bubbling paint or peeling wallpaper
Water stains on ceilings or walls mean water has already traveled. Vinyl wallpaper and paneling can trap moisture behind them, and the EPA warns that pulling off moldy wallpaper can release a large burst of spores.
Soft baseboards or swollen cabinet bottoms
On a slab home, water from a supply line or a slow leak tends to wick up the bottom of walls and into cabinet bases, where it stays out of sight.
It returns after cleaning
Mold that comes back in the same place means the moisture source is still there. The EPA is direct about it: if the water problem is not fixed, mold will come back.
What the EPA says about bleach
Many people reach for bleach first. The EPA does not recommend chlorine bleach or other biocides as a routine practice during mold cleanup, though it notes professionals may use them in specific cases, for example when people with weakened immune systems are present. Its reasons are worth knowing:
- Dead mold still matters. The EPA says dead mold may still cause allergic reactions in some people, so it is not enough to kill mold; it has to be removed.
- Porous materials hold on to it. Mold grows into porous materials such as drywall, ceiling tile and carpet, where it can be hard or impossible to remove completely. The EPA says those materials may have to be thrown away.
- Fumes are dangerous. The EPA warns never to mix chlorine bleach with cleaning products that contain ammonia, because toxic fumes can form.
For anything beyond a small spot on a hard surface, the safer path is a professional who removes the damaged material properly and finds the moisture source. Painting over mold is not a fix either; the EPA says not to paint over wet or moldy surfaces until the water problem is fixed.
Do this, not that, while you wait
Do
- Find and stop any active leak, or close the main water shutoff if it is safe to reach.
- Photograph the mold and any water stains for your insurer before anything is moved.
- Keep the door to the room closed and keep children and pets out.
- Ask about your air conditioner if mold is near a vent or the air handler.
- Write down when you first noticed the smell, stain or leak.
Do not
- Pull off moldy wallpaper or tear into a wall to see how far it goes.
- Spray or scrub mold that covers a large area or follows sewage or floodwater.
- Paint or caulk over mold.
- Run a heating and cooling system you suspect is contaminated; the EPA says it can spread mold through the building.
- Mix cleaning chemicals.
Safety before anything else. If you smell gas, leave the house now and, once outside, call 911 and your gas utility's emergency line (CenterPoint Energy serves much of greater Houston). Never walk into standing water near outlets, cords or appliances; switch power off at the breaker only if you can reach the panel while standing on a dry floor, otherwise call your electric utility (CenterPoint Energy in much of greater Houston) or an electrician. Stay out of sewage water. If it is safe to reach, close the main water shutoff.
Why mold removal comes up so often in Houston
Mold removal in Houston is common for a plain reason: the region gets wet often and dries slowly. Houston air is humid for much of the year, and the EPA advises keeping indoor relative humidity below 60 percent, ideally between 30 and 50 percent. Homes that lose air conditioning during a storm outage, or that close up a damp room for days, can climb above that.
Bathrooms without an exhaust fan vented outdoors, closets on exterior walls, the area behind refrigerators and washing machines, and the bottom of walls on slab foundations are the usual problem spots. After a flood, a hurricane roof leak or a frozen pipe, the trouble spreads quickly because so much material gets wet at once. The EPA's guideline is to dry wet materials within 24 to 48 hours; past that, mold growth becomes likely. The how fast mold grows guide explains that window, and the water damage restoration page covers the drying that should happen before mold has a chance.
When to call for mold removal
Call when the mold covers a large area or keeps coming back, when it followed a flood, sewage backup or long hidden leak, when someone in the house has breathing problems, or when you simply do not want to handle it. The company you are connected with can tell you whether the job is a removal job or a licensed remediation project, and whether a separate assessor should look first. If you suspect mold but cannot find it, the mold inspection and testing page explains what a licensed assessor does.
Renting in Houston and found mold?
Tenants are in a different spot from owners. TDLR says it has no authority to make a landlord clean up mold or to require mold testing in a home or apartment; it points renters to city or county authorities that handle sanitary living conditions. TDLR can take a complaint if you believe unlicensed people are doing mold assessment or remediation work that is not exempt. Report the leak and the mold to your landlord in writing, keep copies and photos, and check your lease and renters policy.
What to ask a mold removal company in Houston
- How many square feet do you measure, and does that put the job at or above 25 contiguous square feet?
- If it does, who is the licensed assessment consultant, and what are both TDLR license numbers?
- What material will you remove, and how will you keep dust out of the rest of the house?
- What caused the moisture, and who will repair it?
- Is rebuilding included, or is it a separate estimate?
Not sure if it is a cleaning job or a remediation job? Call the free line and describe the size and where it is. You are connected with an independent local company that inspects in person and gives you its own written estimate.
Related pages
- Mold Remediation in Houston
- Mold Inspection and Mold Testing
- Water Damage Repair
- How Fast Does Mold Grow After a Leak?
- How to Check a Water Damage Company Before Hiring
About this line: Water Damage Pro Houston is a free phone line, not a restoration company. It answers your call and connects you with an independent local water damage restoration company, which inspects, quotes and does the work, and which you pay directly. Companies may pay a referral fee. The line never charges you. Read how the line works.