Mold remediation contractor insurance, and the exclusion written for your trade

The exclusion did not appear on its own. It sits on top of the pollution exclusion that post-1986 general liability forms already carried, which the industry calls the absolute pollution exclusion and which defines pollutants as "any solid, liquid, gaseous or thermal irritant or contaminant, including smoke, vapor, soot, fumes, acids, alkalis, chemicals and waste," with the courts split on how far those words reach (IRMI, absolute pollution exclusion). The contractors pollution liability page works through that exclusion and the policy written to fill it. What is specific to mold is where the market put the exposure afterward. IRMI's account of the period after 2001 is that insurers moved mold off the general liability form and into pollution policies whose pollutant definitions were extended to microbial matter, one of them defining it as "fungi or bacterial matter which reproduces through the release of spores or the splitting of cells, including but not limited to, mold, mildew and viruses," usually with small sublimits or priced case by case (IRMI, policy modifications relating to mold coverage). IRMI is an industry publisher, not a regulator, and that is market practice rather than a rule.

The practical consequence for a remediation contractor is that the policy which actually answers for your work is usually a separate one, written on a pollution or environmental form, and the question is whether its definition of a pollution condition includes fungi in those words. It is a definition question and not a marketing question, and it is worth reading before the quote is compared to another quote. A trade that lives in the neighboring problem is pest control, where the chemical is what the pollution exclusion reaches and an ISO applicator endorsement gives back coverage on a compliance condition. Same structure, different substance: an exclusion drawn around the thing the business does for a living.

Texas licenses this trade through the Department of Licensing and Regulation, under Chapter 1958 of the Occupations Code and Chapter 78 of the administrative code. TDLR licenses mold assessment technicians, consultants and companies, mold remediation contractors and companies, mold analysis laboratories and training providers, and registers mold remediation workers; it reported 5,646 licensees in fiscal 2025. Mold remediation is defined as "the removal, cleaning, sanitizing, demolition, or other treatment, including preventive activities, of mold or mold-contaminated matter," and the department's authority runs only to mold-related activities that affect indoor air quality (TDLR, Mold Assessors and Remediators At A Glance).

The insurance requirement is in the rule. A licensee must obtain commercial general liability insurance "in the amount of not less than $1 million per occurrence" and maintain it for the term of the license. A self-insured governmental entity is exempt. A business or an individual may be self-insured by filing an affidavit, approved by the department, stating a net worth of at least $1 million, with a current financial statement showing it. If a policy expires, is canceled or is materially changed, the licensee "shall cease engaging in mold-related activities" until the certificate of a renewal or replacement policy is filed, or the self-insurance affidavit is approved (16 TAC 78.40). The company license is where that proof is collected: an applicant provides "proof of compliance with the insurance requirement for licensees specified in 78.40," must employ at least one licensed mold remediation contractor at all times, must train employees on personal protective equipment, and must give the client a work plan at least one day before preparation work begins (16 TAC 78.60).

Now put the rule next to the endorsement. The rule names an amount and a form of policy. It does not say the policy has to cover fungi. A Texas mold remediation company can hold a compliant license, file a valid certificate at renewal, and carry a policy with CG 21 67 attached that excludes the entire trade. Nothing in the licensing file catches it, because the file is checking the limit. This is not a loophole a contractor is exploiting; it is the ordinary result of a licensing rule written in 2004 terms and an insurance market that moved. The check belongs to you and your agent, and it is the endorsement schedule rather than the declarations page.

Twenty-five contiguous square feet is the line for the rest of it. TDLR's exemptions include building maintenance activities such as HVAC and plumbing work, residential property owners or building staff remediating buildings of 10 or fewer units, remediation during construction and renovation by owners of one- or two-family homes, and "Mold projects of less than 25 square feet" (TDLR, mold FAQs). Above that line, notification goes to the department where contamination "affects a total surface area of 25 contiguous square feet or more," on a department-approved form identifying the responsible person, the site, the building and its owner, the start and stop dates and the scheduled hours, "no less than five calendar days before the anticipated start date" (16 TAC 78.110). The drywall contractor who opens a wet wall and keeps going is the exposure at that line, which is worth knowing if you also run a general trades crew. Texas rules on the rest of the trades sit on the Texas hub.

Florida licenses mold assessors and mold remediators under Chapter 468, Part XVI, and its insurance section is worth reading word for word next to the Texas rule. "A mold assessor shall maintain general liability and errors and omissions for both preliminary and postremediation mold assessment insurance coverage of at least $1 million." "A mold remediator shall maintain a general liability insurance policy in an amount of not less than $1,000,000 that includes specific coverage for mold-related claims" (Fla. Stat. 468.8421). The clause at the end is the one Texas does not have. Florida requires the policy to include the coverage that CG 21 67 takes away, which means a Florida remediator who satisfies the statute has answered the endorsement question by satisfying it. Both states arrive at $1 million. Only one of them says what the $1 million has to be for.

Florida also separates the two roles on a clock rather than by project. A mold assessor may not "perform or offer to perform any mold remediation to a structure on which the mold assessor or the mold assessor's company provided a mold assessment within the last 12 months," and a remediator may not perform an assessment on a structure it remediated in the last 12 months, with an exception for Division I certified contractors. The same section requires documented training in water, mold and respiratory protection before the work is performed (Fla. Stat. 468.8419). Texas draws the line at the project instead: the same company may not assess and remediate the same job unless it is employed by a school district (TDLR, mold FAQs). Either way, the revenue you cannot bill on a job you already touched is a business fact before it is an insurance one.

On a licensed Texas job you are not writing your own scope. An assessment consultant prepares a remediation protocol specific to the project and gives it to the client at least one calendar day before work begins, specifying the rooms or areas, the quantities of material to be removed or cleaned, the personal protective equipment remediators will use, the containment types, the remediation methods and "the proposed clearance criteria for each type of remediation in each type of area in the project." Your work plan is then built to meet the protocol (TDLR). That structure decides where a dispute lands. A containment that failed is your general liability claim. A protocol that called for the wrong scope is the assessor's, which is why Florida makes the assessor carry errors and omissions and not only liability. Where you sign an opinion rather than perform labor, the professional liability page is the line to read.

The job ends on a Texas Department of Insurance form. Not later than the 10th day after remediation is complete, a license holder provides the property owner a certificate of mold remediation, which must include a statement by a mold assessment license holder that "the mold contamination identified for the project has been remediated as outlined in the mold management plan or remediation protocol," and which indicates whether the underlying cause has been remediated so that it is reasonably certain the mold will not return from that cause. An owner who sells the property must give the buyer a copy of each certificate issued in the preceding five years. Subsection (d) says who designs the document: "The commissioner of insurance shall adopt rules describing the information that must be provided in the certificate of mold remediation" (Tex. Occ. Code 1958.154), and TDLR confirms the practical result, that the certificate is a Texas Department of Insurance form.

The reason is in the Insurance Code. An insurer may not make an underwriting decision on a residential property policy based on previous mold damage or a mold claim where the property was remediated and a certificate was issued under Section 1958.154, or an independent assessor found no evidence of mold damage remaining (Tex. Ins. Code 544.303). That is a rule about the homeowner's policy rather than yours, and the two should not be confused. What it means for your business is that the last document you hand over is the one that restores your customer's insurability, and a homeowner who learns that late is an unhappy customer. It is also the strongest reason to finish the file properly on every job, including the small ones.

Business property coverage can extend to equipment and supplies whether owned or leased (NAIC, Insure U: Small Business Insurance), and this trade's property is a truckload of it: negative air machines and HEPA filtration, dehumidifiers and air movers, moisture meters and thermal cameras, containment poly and zipper doors, HEPA vacuums and the respirators themselves. It moves to a different building every week and sits in a job trailer overnight, which is why agents write it as an equipment floater rather than as property at a fixed address. The tools and equipment page covers how that line is written and where it stops.

The harder property question is the building. You are working inside someone else's structure, cutting out material, and running containment across finished space. A standard liability form has something to say about property in your care, custody or control, and the scope of that language is a real limitation rather than a technicality; the general liability page works through what the form covers and what it leaves. Ask specifically how damage to the area you are containing is treated, because on a mold job the work area and the damaged property are frequently the same room.

Nearly all states require an employer to carry workers compensation, in the NAIC's words. Premium starts with payroll sorted into classifications, a rate per $100 of payroll for each class, and an experience modifier for the employer's own loss history, which is the Texas Department of Insurance's description of its system (TDI, workers compensation rate guide). Texas is the state that lets a private employer decline coverage, and TDI says workers compensation "is not required in most cases" (TDI, employer resources); what a non-subscriber files and what defenses it gives up are on the Texas hub, and the workers compensation page carries how the line is rated for a contractor. Declining it on a trade where employees wear respirators inside containment is a decision worth making deliberately.

The respirator is an OSHA program, not an item of equipment. "A respirator shall be provided to each employee when such equipment is necessary to protect the health of such employee," and in any workplace where respirators are necessary, or wherever the employer requires them, "the employer shall establish and implement a written respiratory protection program with worksite-specific procedures," covering selection, medical evaluations, fit testing for tight-fitting facepieces, use, cleaning and maintenance, training and program evaluation (29 CFR 1910.134). Florida puts documented respiratory protection training in the licensing statute for the same reason. An underwriter who asks whether you have a written program and current fit test records is asking a question with a paper answer, and the file that answers it is the same file that answers an inspector.

There is no federal license for this trade. EPA publishes guidance for schools and commercial buildings, written for building managers to "evaluate an in-house remediation plan or a remediation plan submitted by an outside contractor," and its central point is that "mold growth can be controlled indoors by controlling moisture indoors" (EPA, Mold Remediation in Schools and Commercial Buildings). That is guidance rather than a standard, and EPA does not certify or license remediators. The licensing is the states', and it is uneven: Texas and Florida license the trade, and plenty of states do not license it at all.

The inputs behind a quote, not a quote. On this trade the first question is not price at all, it is whether fungi is covered and at what aggregate, because two quotes with the same limit can differ by the entire scope of your work. After that: revenue, because the liability premium is often rated on it, and payroll, because the workers compensation premium is built on it. What else you do, since a company that also runs water damage restoration, demolition or reconstruction is being rated on those operations too. The states you work in and what each licenses. Whether you carry a professional liability policy for the opinions and reports you sign. The size and type of buildings you contain, because an occupied school and a vacant duplex are different risks. Your loss history, which reaches the workers compensation premium through the experience modifier. And your records: the written respiratory program, the training file, the protocols and work plans, the certificates issued on time. The lever you hold is description. A company described as "mold" is priced on the worst thing an underwriter has seen in the class, and a company described by its protocols, its containment practice and its files is priced on what it is. The contractor insurance cost guide explains what the rating inputs are across the trades, and the janitorial page is a useful contrast: a trade with no exclusion aimed at it, where the certificate the client asks for is the whole conversation.