01 · Termite profile

Subterranean termites are the statewide concern

The primary Tennessee termite species identified by University of Tennessee Extension are the eastern subterranean termite, Reticulitermes flavipes; the southeastern subterranean termite, R. virginicus; and the light southeastern subterranean termite, R. hageni. Native subterranean termites require moisture and normally maintain a connection with soil.

UT Extension: Subterranean Termite Control, PB 1344North American Termite Survey

Seasonal clues

• R. flavipes commonly swarms from March through May.
• R. virginicus commonly swarms from April through June and may also swarm in fall.
• R. hageni commonly swarms from August through October.
• Heated structures can alter normal swarm timing.

Evidence and inspection locations

• Earthen shelter tubes on foundations, piers, masonry, wood, cracks, or utility penetrations.
• Creamy-white workers or soldiers in tubes or damaged wood.
• Indoor swarmers or piles of equal-sized shed wings, often near windows.
• Soft, channeled, hollow, or unsound wood with soil-like material in galleries.
• Foundation perimeters, crawlspaces, basements, slab edges, sill plates, rim joists, joist ends, posts, porches, steps, garages, decks, additions, and concealed foundation edges.

Formosan subterranean termites

Formosan subterranean termites, Coptotermes formosanus, deserve special vigilance in West Tennessee. Repeated detections support an elevated watch in Shelby County. Earlier Tennessee detections occurred in Henderson County, and a transported-boat case was identified in Roane County near Watts Bar Lake. These records do not establish uniform statewide distribution.

Possible clues include larger yellow-brown alates with densely hairy wings, evening swarms, oval or teardrop-shaped soldier heads, unusually broad hollowing, and above-ground carton nests where building moisture is sufficient. Suspected Formosan or other Coptotermes findings require qualified evaluation and state reporting.

UT Formosan Subterranean Termite Survey Update

Drywood and dampwood termites

Drywood termites do not naturally occur in Tennessee, but they can arrive in furniture, antiques, salvaged lumber, and other transported wood. Hard, concave, six-sided pellets near kick-out holes are a useful comparison clue; professional identification is still appropriate. Dampwood termites should not receive routine Tennessee emphasis because authoritative state sources reviewed for this guide do not establish them as a regular structural pest.

UT Urban IPM: Drywood Termites in Tennessee

02 · Carpenter ants

Excavated wood, coarse debris, and a moisture story

UT Extension reports approximately ten carpenter-ant species in Tennessee. Structure-associated colonies are often large and blackish, although reddish-orange and mixed-color forms also occur. Carpenter ants excavate galleries rather than digesting wood. They can use dry wood, insulation, false ceilings, hollow columns, and voids, but moisture-damaged wood is especially important.

Carpenter-ant galleries are usually clean and smooth; termite galleries commonly contain soil or mud-like material. Large field ants can resemble carpenter ants, so a few foragers alone do not establish a structural nest.

UT Extension: Carpenter Ants, PB 1599UT Urban Integrated Pest Management

03 · Wood-boring beetles

Hole shape, frass, wood type, and freshness all matter

Document hole size and shape, frass texture, affected material, moisture, distribution, visible section loss, and specimens. Tennessee’s 18-percent moisture rule applies to certain preventive beetle pesticide treatments; it is not a universal home-inspection diagnosis.

UT Extension: Managing Pests Around the Home, PB 1303Tennessee Pest-Control Rules

04 · Carpenter bees

Round entrance holes in exposed wood

The eastern carpenter bee, Xylocopa virginica, commonly excavates an entrance hole near three-eighths inch in diameter, turns at a right angle, and follows the wood grain. Repeated reuse and enlargement can create long galleries over several seasons.

• Fascia, soffits, siding, porch ceilings, railings, posts, decks, fences, and trim.
• Nearly round openings, coarse sawdust, yellow-brown staining, repeated bee activity, and woodpecker damage.
• Warmer sunny exposures and unfinished or weathered softwood.

Separate the localized wood damage from the stinging-insect concern. Recommend qualified pest evaluation where activity is extensive, access is hazardous, or pesticide use is contemplated.

UT Extension: Carpenter Bees, W 876

05 · Moisture and fungal decay

Follow the water as carefully as the damaged wood

Moisture-related deterioration is a statewide structural concern and can also favor carpenter ants, anobiid beetles, and termite activity. Common locations include crawlspace sills, joists, beams, posts, subflooring, deck and porch connections, rim joists, roof sheathing, openings, siding, trim, plumbing penetrations, bathrooms, kitchens, condensate areas, and basement framing.

• Softness, crushing, probing failure, stringy or cubical texture, and lost wood section.
• Depressed surfaces, failed fasteners, fungal fruiting bodies, sagging, and staining.
• Surface mold or discoloration alone does not prove structural decay.

USDA Forest Products Laboratory: Wood Handbook

06 · Tennessee regional conditions

Climate and terrain change the inspection story

Tennessee’s warm, humid growing season and year-round precipitation support long termite activity periods and repeated wetting. Nashville’s 1991-2020 normal annual precipitation is about 50.5 inches, but topography produces significant regional differences.

Middle Tennessee climatology ranges from less than 48 inches near Nashville to more than 57 inches in the southwest and over 62 inches on the southern Cumberland Plateau near Monteagle. Approximately two-thirds of precipitation commonly falls from November through May.

NWS Nashville Climate RecordsNWS Middle Tennessee Heavy-Precipitation Climatology

07 · Construction hotspots

Where access, water, and cellulose meet

Crawlspaces

Review soil moisture, drainage, vapor-retarder condition, standing water, plumbing or duct condensation, wood debris, low clearance, blocked access, concealed framing, insulation, and wood-to-soil contact.

Basements and slabs

Inspect sill plates, joist ends, partitions, stairs, utility penetrations, leakage, condensation, finished walls, slab edges, expansion joints, garages, porches, steps, and additions. Finished surfaces can conceal both moisture and termite entry.

Exterior cladding, decks, porches, and logs

Below-grade foam, EIFS, stucco, siding, and decorative veneers can conceal foundation edges or hold moisture. At exposed wood, inspect ledgers, posts, beam ends, stringers, rail attachments, end grain, checks, sealant failures, and repeated wetting.

08 · Field identification

A comparison table for visible clues

09 · Reporting and referral

Keep the observation separate from the pest conclusion

Tennessee home-inspector standards require the inspection report to state that the inspection does not address wood-destroying insects and organisms. The standards also say the home inspector is not required to report the presence or absence of pests such as wood-damaging organisms, rodents, or insects.

A practical home-inspection narrative can still describe visible building conditions within the inspector’s license, agreement, and insurance: damaged framing, moisture, holes, tubes, debris, wings, access limitations, and other observations. Avoid unconfirmed species, activity, treatment, or clearance conclusions.

• Identify the component, material, and exact location.
• Describe the visible pattern and extent.
• Record accessible contributing conditions and important limitations.
• Recommend a qualified pest professional for organism identification, current activity, regulated inspection, treatment, or clearance.
• Recommend structural evaluation when section loss, sagging, failed connections, damaged posts or beams, or concealed extent may affect capacity.

Tennessee Home Inspector Rules and LawsOfficial Standards of Practice, Chapter 0780-05-12

10 · Tennessee regulation

Home inspection and regulated WDI work are separate services

Home inspectors are regulated by the Tennessee Department of Commerce and Insurance. Wood-destroying-organism pest control is regulated by the Tennessee Department of Agriculture. The WDO category covers termites, wood borers, carpenter bees, carpenter ants, and decay, and applicants must also hold Category 7 certification.

A company offering custom pesticide application needs a pest-control charter for each location and an appropriately licensed individual for each category offered. Regulated transaction reports use prescribed NPMA or HUD forms, may be issued only through properly chartered and qualified operations, and carry a 90-day warranty under Tennessee law.

Tennessee rules require Formosan or other Coptotermes infestations to be treated with an appropriately labeled pesticide and reported to the Department of Agriculture. This educational reference supports recognition and referral; it does not authorize treatment advice, pest-control contracting, termite clearance, regulated WDI reports, or credential-dependent conclusions.

TDA Certification, Licensing and ChartersTennessee Pesticide ChartersTennessee Pest-Control FormsTennessee Pest-Control Rules