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Mold Remediation in Nashville, TN
Morning relative humidity in Nashville averages 84 percent across the year and falls only to 56 percent by afternoon, so damp drywall, crawl spaces, and cabinets dry slowly. One call reaches vetted local mold-remediation pros.
Recent floods · Nashville
No recent flood events near Nashville — see the live board.
Mold follows water, and Davidson County averages 47.3 inches of rain a year, with flash floods that push water into homes. The March 2021 storm dropped 7.01 inches at Nashville International Airport and killed four people in the county. Metro Public Health Department guidance notes that mold grows wherever relative humidity stays above 60 percent, and advises fixing leaks and drying affected areas within 24 to 48 hours — a narrow window once floodwater has been through a house.
Mold risk in Nashville
47.3"
average annual precipitation (NOAA)
71%
of Davidson County's 28 declared disasters were floods, hurricanes or storms (FEMA)
0.11"
rain forecast for Nashville in the next 24 hours — fresh moisture keeps the mold clock running (NWS)
Sources: FEMA OpenFEMA — federally-declared disaster history (county FIPS 47037) · NOAA NCEI — 1991–2020 Climate Normals (NASHVILLE INTERNATIONAL AIRPORT, TN US)
What makes Nashville a mold-prone city
Rain reaches Nashville on 121 days in an average year, 79 of them delivering a tenth of an inch or more, and May is the wettest month at 5.02 inches of normal precipitation. Against an annual total of 47.3 inches, it is the frequency of wetting rather than any single storm that keeps building materials in the county damp for long stretches.
The larger events push water indoors outright. The March 2021 flash flood drove the Harpeth River near Kingston Springs to 35.36 feet, second only to its May 2010 crest of 46.00 feet. Mold work in the area tends to trail those floods by weeks, after the standing water is gone and the wet cavities behind walls and under floors are not.
Local construction rules reach only part of the housing stock. The four-foot freeboard for new floodplain homes and the requirement that flood-zone enclosures carry openings totaling one square inch per square foot of enclosed area apply to new construction and to substantial improvements exceeding 50 percent of a building's pre-improvement value, so older homes were built and repaired to older standards. Tennessee's statutory disclosure form asks sellers about flooding, drainage, and moisture accumulation without naming mold, and a contractor license is required only once a project's total cost reaches $25,000. Vetting credentials and scope therefore falls to the homeowner; the mold remediation guide covers what a proper assessment should include.
Mold remediation rules & licensing
Tennessee regulates mold work through general contractor law rather than a dedicated mold statute: there is no state license for mold assessors or inspectors, no mandatory post-remediation clearance testing, and no notification filing. Two cost thresholds decide who may lawfully take a job in Nashville. Work priced at $25,000 or more requires a contractor license carrying the Specialty/Environmental classification with the mold remediation sub-classification. Below that, residential jobs between $3,000 and $24,999 require a Home Improvement license — a rule that binds here only because Davidson County is one of nine counties that adopted it. Local agencies enforce building maintenance standards and publish moisture guidance, but set no mold-specific licensing or testing rules.
| Permit / inspection | When it applies |
|---|---|
| Tennessee Board for Licensing Contractors — Contractor License ($25,000 threshold) | State-level, applies countywide. A contractor license is required prior to contracting — that is, before bidding or negotiating a price — whenever the total cost of the project is $25,000 or more, and the board names environmental remediation among the covered trades. The threshold counts labor and materials together, so mold remediation bundled into a larger repair job can cross it even when the mold scope alone would not. |
| Tenn. Comp. R. & Regs. 0680-01-.16 — Specialty/Environmental Classification, Sub-classification F (Mold Remediation) | State-level rule setting the classification a licensed remediator must hold. It lists "F. Mold Remediation" under the Specialty/Environmental category, alongside asbestos handling and lead paint abatement. Applicants must show the board that designated employees completed all training courses required by state and federal agencies; where such courses are unavailable, the board weighs the applicant's education, training, experience, and equipment instead. Licensees must keep abreast of applicable state and federal requirements as a renewal condition. |
| Tennessee Home Improvement Contractor License | State-issued but county-gated, and it binds here: Davidson County is one of nine adopting counties, with Bradley, Hamilton, Haywood, Knox, Marion, Robertson, Rutherford, and Shelby. Residential remodeling priced from $3,000 to $24,999 requires this license. Home improvement is defined at T.C.A. 62-6-501(4)(A) to include repair, replacement, remodeling, alterations, or additions to a residential building. Licensees must post a $10,000 surety bond or equivalent cash bond, property bond, or irrevocable letter of credit. |
| Metro Public Health Department — mold and moisture guidance for homes | County-level guidance, not a regulation. The department publishes homeowner mold advice but does not license remediators, inspect for mold, or set clearance standards. It advises fixing leaks and drying affected areas within 24 to 48 hours, notes that molds will grow where indoor relative humidity stays above 60 percent, and states that a professional may need to be consulted where contamination is extensive. Sampling is described as expensive and less useful than correcting the underlying water damage. |
| Metropolitan Code of Laws, Title 16.24 — Property Standards Code | City-county level, enforced by the Property Standards Division of the Metro Department of Codes and Building Safety. All buildings, residential and non-residential, must meet minimum maintenance standards: good general condition inside and out, kept clean, safe, and sanitary. No provision names mold specifically, but the health department directs building maintenance questions to this agency, which makes the title the enforcement hook for chronic leaks and damp interiors in rental housing. |
| T.C.A. § 66-28-102 — Uniform Residential Landlord and Tenant Act, Application | State-level, and the reason the act reaches rental housing here: the chapter applies only in counties having a population of more than seventy-five thousand, according to the 2010 federal census. In covered counties it occupies and preempts the entire field of legislation concerning landlords and tenants, and county governing bodies may not enact or enforce regulations that conflict with or add to it — so no separate local mold ordinance for rentals is possible. |
| T.C.A. § 66-28-304 — Maintenance by landlord | State-level, applying to rental dwellings in this county under the act's population test. Landlords must comply with applicable building and housing codes materially affecting health and safety, and make all repairs and do whatever is necessary to put and keep the premises in a fit and habitable condition. Tennessee sets no mold-specific standard, so this habitability duty is the provision tenants invoke over unrepaired leaks and resulting mold growth. |
Mold disclosure & remediation standards
- Tennessee Residential Property Disclosure Act — T.C.A. § 66-5-202
- State level. An owner selling residential property of one to four dwelling units must hand the buyer a written disclosure statement covering the condition of the property, including any material defect known to the owner, which is where past water intrusion or mold growth has to be reported. The only alternative is a disclaimer statement selling the property as is, and that option exists solely where the buyer waives the disclosure.
- Statutory disclosure form contents — T.C.A. § 66-5-210
- State level. The form set by statute has no standalone mold line. Moisture history surfaces instead through the defect checklist entries for basement, roof and sewer or septic, through the question asking whether the property has flooding, drainage or grading problems, and through the environmental hazards item that reaches contaminated soil or water. Buyers are advised on the form itself to add their own inspection contingencies, since it is not a warranty.
- Rented Premises Unfit for Habitation — T.C.A. §§ 68-111-103 and 68-111-104
- State level. A tenant or a third-party complainant may file a complaint with the city or county building inspector or with the county public health department when rented premises violate minimum health standards and are consequently unfit for human habitation. The inspection must follow within fourteen days of filing, with further re-inspections after the correction period runs. This is the route a renter uses when a landlord leaves a damp or mold-affected unit unrepaired.
- Metropolitan Code of Laws § 16.24.340 — Exteriors of buildings and structures
- Local level. Article V of the property standards code requires roof drainage adequate to prevent dampness or deterioration in the walls or the interior portion of a building, and requires roof drains, gutters and downspouts to be kept in good repair and free from obstructions. Exterior surfaces including doors, window frames, cornices, porches, trim, balconies, decks and fences must be maintained in good condition, which is the enforceable hook against the chronic leaks that feed mold.
- Metropolitan Code of Laws § 16.24.570 — Determination of unfitness for habitation, occupation or use
- Local level. Article VI lets the director of codes declare a dwelling or structure unfit for human habitation, occupation or use where conditions exist that are dangerous or injurious to the health or safety of the occupants, of neighboring occupants, or of other residents of the metropolitan government area. Severe untreated mold and moisture damage is evaluated under that general health-and-safety standard rather than a numeric mold threshold.
Local mold notes
- Metro Public Health Department — homeowner publication on mold and moisture in the home — The health department's homeowner publication takes a position on testing: air and surface sampling by an environmental consultant or microbiology lab is described as very expensive, with no simple way to sample indoor air and difficulty saying at what levels health effects occur, so correcting the underlying water damage and cleaning the affected area is presented as more important than identifying the mold.
- Metro Historic Preservation — Tips for Drying Out a Water Damaged Building — Guidance published by the Metropolitan Historic Zoning Commission for owners of older housing stock cuts against standard restoration practice: allowing natural ventilation and evaporation to work is called better for the building than heated forced-air or air conditioning systems, because rapid mechanical drying can cup and warp wood floors, which may take several months to dry.
- Metro Codes Property Standards — violation investigation and resolution process — Damp and unsanitary interior conditions are pursued through the general Property Standards enforcement track rather than a mold-specific rule. Inspectors attempt to visit a reported property within one to five business days and document the violation, the owner receives an abatement notice with a correction deadline that varies by severity, and a re-inspection follows.
Cleanup & recovery services nearby
- 615 Dumpster Rentals — Locally owned roll-off dumpster rental with offices in the city, Franklin, and Mt. Juliet — 7, 15, 20, and 40-yard containers for gut-out debris and household cleanouts.
- Waste Solutions of Tennessee, LLC — Family-owned debris hauler serving Davidson County with 10- to 40-yard containers plus specialty dumpsters for concrete, dirt, and tree debris — chemicals, paint, gasoline, and hazardous materials are prohibited.
- The Good Tree Company — Arborist service on TN-100 handling storm cleanup across Davidson County — fallen tree removal, broken limbs, stump grinding, and debris disposal.
- Nashville Board Up Company — Emergency board-up of windows, doors, and other openings, glass replacement from single panes to storefronts, and roof tarping — serves the metro area and out to roughly 100 miles.
- East Nashville Self Storage — Locally owned facility at 800 Main Street with gated access, video surveillance, a loading dock, on-site truck rentals, and moving supplies — roughly 80 percent ground-level units.
- Dumpsters On Demand LLC — Family-owned 15-yard roll-off rental covering the county — takes demolition materials, furniture, appliances, and yard waste, but not gasoline or motor oils.
By the numbers
- Average morning relative humidity — NOAA's comparative climatic data for the airport station, 1948–2018; the afternoon average is 56 percent.
- 84%