Mold Compass Free mold guidance and practical resources
Free Membership Membership
Knoxville, Tennessee mold guide

Mold Guide for Knoxville, Tennessee

Local mold risk drivers, seasonal priorities, and next steps for homeowners and renters in Knoxville.

State law data last updated: 2026-02-02

Overview

Knoxville receives roughly 51.9 inches of precipitation per year at an average of 59.6 F, which means it experiences frequent wet weather.

The broader Tennessee climate, including seasonal humidity peaks and storm activity, shapes the indoor moisture environment alongside local conditions.

Knoxville sits in a valley with humid summers and frequent rain, so moisture can linger without ventilation.

Knoxville Neighborhood Codes Enforcement handles property condition enforcement.

Knoxville Neighborhood Codes Enforcement addresses property condition complaints and code enforcement.

This guide highlights local moisture drivers, seasonal risk, and prevention steps. For legal rights and landlord obligations, review the Tennessee mold laws guide.

Sources: [Tennessee - Climate | Britannica] | [Knoxville Neighborhood Codes Enforcement] | [NOAA Climate Normals - KNOXVILLE MCGHEE TYSON AP, TN US]

Action Checklist

Get free access to the full guide

8-step checklist for immediate action

Knoxville Home Inspection Checklist

Common construction types in Knoxville affect where moisture problems develop. Here is how local building patterns shape what to inspect.

In Knoxville, neighborhood Codes Enforcement handles property condition enforcement.

Documenting moisture issues helps support inspection follow up.

Knoxville Neighborhood Codes Enforcement addresses property condition complaints and code enforcement.

Sources: [Knoxville Neighborhood Codes Enforcement]

  • Annual rainfall of 51.9 inches means Knoxville attics and basements face repeated moisture exposure. Inspect after each storm.
  • Roof flashing, gutters, and downspout extensions.
  • Window and door seals after heavy rain.
  • HVAC condensate drain lines and drip pans.
  • Bathroom exhaust fans and vent ducts.
  • Crawl spaces and lower level storage areas.
  • Laundry hoses and shutoff valves.
  • Kitchen cabinet bases around plumbing.

Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - KNOXVILLE MCGHEE TYSON AP, TN US]

Warning Signs of Mold in Knoxville

Watch for these signs that moisture is lingering in Knoxville homes and rentals:

  • Condensation forming on glass during Knoxville warm seasons (average temp 59.6 F) suggests indoor humidity needs attention.
  • Musty odors after storms or humid stretches.
  • Condensation on windows that lingers into the day.
  • Peeling paint near baseboards or window trim.
  • Dark spotting near supply vents or ceilings.
  • Soft drywall around tubs or showers.

Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - KNOXVILLE MCGHEE TYSON AP, TN US]

Mold Risk Factors in Knoxville

These are the most common moisture drivers for homes and rentals in Knoxville:

  • Knoxville averages 51.9 inches of precipitation annually, keeping roofs, windows, and foundations under regular moisture pressure.
  • Humid summers slow drying after leaks.
  • Thunderstorms bring heavy rain that tests roof flashing.
  • Warm seasons increase cooling and condensate loads.
  • Basements and crawl spaces can stay damp after storms.
  • Bathroom and laundry ventilation gaps trap moisture.

Sources: [Tennessee - Climate | Britannica] | [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - KNOXVILLE MCGHEE TYSON AP, TN US]

Knoxville Seasonal Risk Calendar

Spring

Thunderstorms increase. Inspect roof edges and window seals after heavy rain.

Summer

At 59.6 F annually, air conditioning runs much of the year. Inspect condensate drains regularly and dehumidify lower levels.

Fall

Storms linger. Clear gutters and confirm drainage.

Winter

Cooler air lowers humidity, but condensation can form in tight homes.

Sources: [Tennessee - Climate | Britannica] | [NOAA Climate Normals - KNOXVILLE MCGHEE TYSON AP, TN US]

Knoxville Moisture Playbook

Use this short playbook to stay ahead of common moisture problems in Knoxville.

After a Leak

Stop the leak, remove wet materials within 24 to 48 hours, and dry the area with airflow.

Monthly Maintenance

Clear condensate lines, inspect under sinks, and log indoor humidity.

Seasonal Tune Up

Clear gutters and inspect flashing before heavy rain arrives. At 51.9 inches yearly, maintaining 30 to 50 percent indoor humidity helps prevent growth.

Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - KNOXVILLE MCGHEE TYSON AP, TN US]

Mold Prevention in Knoxville

Use these priorities to keep indoor humidity low and avoid recurring growth:

  • With 51.9 inches of rain annually, direct all roof runoff away from the foundation using clean gutters and extended downspouts.
  • Maintain indoor humidity between 30 and 50 percent.
  • Dry wet materials within 24 to 48 hours.
  • Vent bathrooms and kitchens outdoors.
  • Clear gutters and direct downspouts away from foundations.
  • Inspect roof flashing and window seals before storm season.
  • Service HVAC condensate drains annually.

Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - KNOXVILLE MCGHEE TYSON AP, TN US]

State Laws and Rights

Tennessee mold law snapshot

Tennessee does not have a mold-specific statute, but habitability rules still apply.

Tennessee's implied warranty of habitability is established under Tennessee Code Annotated Section 66-28-304 as part of the Uniform Residential Landlord and Tenant Act (URLTA). Under this statute, landlords must: (1) comply with requirements of applicable building and housing codes materially affecting health and safety; (2) make all repairs and do whatever is necessary to put and keep the premises in a fit and habitable condition; (3) keep all common areas of the premises in a clean and safe condition; and (4) in multi-unit complexes of four or more units, provide and maintain appropriate receptacles for waste removal. This warranty applies only in counties with populations greater than 75,000 as of the 2010 federal census.

Use the full Tennessee guide for tenant rights, landlord responsibilities, and remedies.

Frequently Asked Questions

What are the first signs of mold in a Knoxville home?
Musty odors, condensation on windows, peeling paint, and dark spots near vents or ceilings are common early signs. If symptoms persist after cleaning, schedule an inspection.
When should I hire a mold professional in Knoxville?
If the affected area is larger than about 10 square feet, if growth returns after cleaning, or if anyone has health symptoms, hire a pro. Use the DIY vs pro guide to decide.
Does Knoxville humidity make mold more likely?
High outdoor humidity slows drying after leaks, which raises risk. Active ventilation and dehumidification are key. Review prevention priorities for humid climates.
What indoor humidity level is safe in Knoxville?
Keep indoor relative humidity between 30 and 50 percent. In Knoxville, that often means running a dehumidifier or air conditioning. See our humidity control guide for setup tips.
What should I do about mold after a Knoxville storm?
Stop the water source, remove wet materials within 48 hours, and run fans and dehumidifiers. Photograph damage for insurance. See the storm recovery guide.
How fast does mold grow after a leak in Knoxville?
Mold can start growing within 24 to 48 hours if materials stay wet. Quick drying is critical. See our prevention guide for response steps.