During a termite inspection, a licensed inspector conducts a systematic visual examination of your home’s interior and exterior, including the foundation, crawl space, attic, all accessible wood framing, and attached structures like decks and porches. They search for live termites, mud tubes, frass, damaged or hollow-sounding wood, evidence of past treatment, and conditions that attract wood-destroying organisms such as wood-to-soil contact and excess moisture. According to Orkin and the National Pest Management Association (NPMA), termites damage approximately 600,000 American homes each year, and U.S. residents spend more than $5 billion annually on termite control and repairs. In Missouri, research cited by ARC Home Inspections shows that 20 percent of homes have termites by age 20, with that figure climbing to 75 percent by the time a home reaches 40 to 50 years old. This article explains what the inspector looks for, where they look, how long it takes, what a “clear” report means, and what happens if they find active damage.
What Happens During a Termite Inspection?
During a termite inspection, the inspector follows a defined sequence from the exterior of the home inward and upward, documenting findings at each phase. The inspection is a visual-only examination of all accessible areas. The inspector does not remove drywall, break open wall cavities, or excavate the soil around the foundation. What they do is examine every surface, joint, and structural wood member they can reach and access, using physical probing with a screwdriver or probe tool to test wood density and detect hollow areas where termites have been feeding.
The inspection typically covers four phases: the exterior perimeter, the interior living areas, the crawl space or basement, and the attic. For a standard-sized home, this process takes between 30 minutes and 90 minutes. Larger homes, homes with multiple structures like detached garages and outbuildings, and homes with extensive prior damage or treatment history take longer. The inspector documents their findings on a standardized report form, often the NPMA-33 Wood Destroying Insect Inspection Report, which is the form required by most lenders and VA or FHA financing programs.
A termite inspection is a separate service from a general home inspection. A general home inspector evaluates visible systems and components throughout the house but is not licensed in most states to issue a WDO (Wood Destroying Organism) report. The termite or WDO inspection requires separate licensing and training. Combining both inspections on the same day is practical and common. You can see the full scope of what both services cover on our Missouri home inspection services page.
Many buyers pair the WDO inspection with their general buyers inspection so both happen in a single site visit, reducing disruption to the seller and giving the buyer a complete picture of the property’s condition in one report cycle.
Buyers purchasing newly built homes should note that new construction does not guarantee a termite-free property. A new construction inspection that includes a WDO component verifies that pre-treatment applied during the build was properly documented and is still active.
How Do I Prepare for a Termite Inspection?
To prepare for a termite inspection, clear access to the areas the inspector needs to reach. Move stored items away from the perimeter of interior walls, particularly in the basement, garage, and utility areas. Clear the exterior perimeter of the home so the inspector can examine where the siding meets the foundation. Make sure the crawl space entry is accessible and that the attic hatch can be reached without obstruction. If you have a detached garage, woodpile, or deck structure, point those out to the inspector when they arrive because wood structures near or attached to the home are always included in the inspection.
You do not need to do any cleaning or cosmetic preparation. The inspector is looking at structural surfaces, not the general appearance of the home. What matters most is physical access to every corner of the building, particularly the areas where termites are most likely to enter and establish: along the foundation, in the crawl space framing, around plumbing penetrations, and at any point where wood contacts or comes close to soil.
What Is the First Thing an Inspector Wants to See?
The first thing a termite inspector wants to see is the exterior of the home, specifically the points where the structure meets the ground. Subterranean termites, which are the most destructive and most common species in the United States, live in the soil and travel up into structural wood through mud tubes they construct to protect themselves from open air. The exterior foundation inspection looks for these mud tubes running up foundation walls, any wood-to-soil contact along siding or framing, wood debris or mulch piled against the structure, and evidence of prior termite treatment like chemical injection holes in the concrete.
From there, the inspector moves to any attached wood structures. Decks, porches, stoops, fence posts, and wooden lattice work are all examined because subterranean termites frequently enter homes through these accessory structures first. Conditions that make a home more attractive to termites, including improper grading that holds water against the foundation, clogged gutters that overflow against the sill plate, and vegetation growing directly against wood siding, all get noted as conducive conditions in the report even if no active termites are found. Our Missouri home inspection checklist covers these exterior conditions as part of the broader evaluation every buyer should request.
What Time of Year Are Termites Most Active?
Termites are most active in spring and early summer, typically from March through June in most of the United States. This is when subterranean termite colonies release swarmers, also called reproductives or alates, which fly out to establish new colonies. Swarmers are often the first visible sign of a termite infestation that homeowners notice, appearing in large numbers near windows and light sources for a brief period before shedding their wings and disappearing. According to the USDA and pest control research, warmer temperatures and increased moisture in the soil after spring rain trigger swarming behavior.
Termites themselves, however, are active year-round in most states. Subterranean termites do not hibernate. They continue feeding in heated structures through winter. Spring is simply when they become most visible to the untrained eye. This is also why spring is the most common season for termite inspections tied to real estate transactions, but it is not the only season when an inspection is appropriate or productive.
Which States Are Worst for Termites?
The states worst for termites are in the South and Southeast, particularly Florida, Louisiana, Mississippi, Alabama, Georgia, South Carolina, and Texas. According to Orkin’s 2025 list of the most termite-infested cities, Miami holds the top spot, followed by Los Angeles and Tampa. The warm, humid climates in these regions support the largest and most aggressive termite colonies, including Formosan subterranean termites, which experts estimate can cause extensive structural damage to a home in under six months under ideal conditions.
Missouri falls in a moderate-to-elevated risk zone. Subterranean termites have been found in 49 of 50 states, with Alaska being the only exception according to Today’s Homeowner and USDA data. Missouri’s climate supports year-round termite activity, and the state’s older housing stock, much of which was built with untreated wood directly on or near the soil, creates favorable conditions. The Missouri Department of Agriculture confirms that subterranean termites are present throughout the state. In Mid-Missouri, the combination of clay-heavy soil that retains moisture and older homes with crawl space foundations makes termite inspections especially worthwhile as part of any property evaluation.
What to Ask During a Termite Inspection
During a termite inspection, ask the inspector these specific questions to get the most value from the visit. First, ask whether any evidence of past treatment is visible and whether records are available from the seller. Previous treatment does not mean a home is now problem-free. It means termites were present at some point and were addressed. Whether the treatment was effective and whether it is still active depends on the method used and how long ago it was applied.
Second, ask whether the conducive conditions found in the report are a high priority or minor concerns. Wood-to-soil contact within 6 inches of the foundation is considered a major conducive condition. A small amount of decorative mulch far from the structure is a minor note. Understanding the difference helps you prioritize what needs to change. Third, ask whether the inspector recommends a follow-up treatment, a preventive treatment bond, or simply monitoring. These are three different responses to three different risk profiles, and the inspector’s reasoning matters. A clear report with no evidence of past treatment on a 50-year-old Missouri home is different from a clear report on a 5-year-old home that was pre-treated during construction.
What Is the Hardest Pest to Get Rid Of?
Subterranean termites are considered among the hardest pests to fully eliminate from a structure because their colonies can contain millions of individuals, their nesting zone is underground and inaccessible, and they can regrow a depleted colony from surviving reproductives over time. A single healthy termite queen can lay up to 30,000 eggs per day according to research compiled by pest control industry sources, and a subterranean colony can grow to over 5 million individuals in optimal conditions. Treatment must either kill the colony at its underground source or create a persistent chemical barrier that workers carry back to the colony over time. Termites that live in the wall framing of a structure, like drywood termites, require fumigation of the entire structure because they cannot be reached with soil treatments alone. Neither approach is a permanent guarantee. Active monitoring and periodic re-inspection are the best long-term strategy.
What Does the Interior Termite Inspection Cover?
The interior termite inspection covers every accessible wood surface throughout the living areas of the home, including window frames, door casings, baseboards, wood floors, visible floor joists in the basement or utility room, exposed beams, garage framing, and any wood paneling or built-in cabinetry that shows signs of moisture or damage. The inspector uses a screwdriver or probe tool to tap and probe wood that appears suspect, listening for the hollow sound that indicates termites have consumed the interior of the wood while leaving the surface intact.
Bathrooms, laundry rooms, and kitchens receive special attention because these are the areas where moisture from plumbing is most likely to keep wood consistently damp. According to the Defender Pest Management guide on WDO inspections, wood-decay fungi thrive wherever wood stays consistently damp, and fungal staining signals moisture intrusion even before visible decay sets in. An inspector who finds wood decay alongside termite activity is identifying a compound problem: the termites found their way into wood that moisture had already weakened. This overlap between moisture damage and termite activity is extremely common in older homes with plumbing that has leaked slowly over years. If mold growth is also suspected in the same areas, mold testing is a worthwhile add-on alongside the WDO inspection.
Where Do Termites Lay Eggs?
Termites lay eggs in the soil colony for subterranean species and inside the wood itself for drywood species. Subterranean termites, which cause the majority of structural damage in the United States, maintain their egg-laying queen in an underground nest that can be 10 to 20 feet below the surface or further. The queen never enters the home. Workers travel from the underground nest up through mud tubes into the wood above, feed on cellulose in the framing, and return to the colony. Drywood termites, more common in coastal and southern states, build their nests entirely within the wood they are consuming. They do not need soil contact. Both species produce frass (termite excrement) as they feed, but it looks different: subterranean termite frass is mixed with soil and mud, while drywood frass appears as small, hard, wood-colored pellets near exit holes in the wood surface.
What the Crawl Space and Attic Inspection Covers
The crawl space is the most important area of a termite inspection in a home that has one. Subterranean termites most commonly enter homes through the crawl space because this is where wood framing is closest to the soil. The inspector examines floor joists, sill plates, girders, piers, and subfloor sheathing for mud tubes, frass, exit holes, staining, and fungal growth. According to InterNACHI’s WDO inspection curriculum, inspectors must document both active infestation evidence and conducive conditions in crawl spaces, including excessive moisture, inadequate ventilation, wood debris on the soil, and wood-to-soil contact at any pier or post.
The attic inspection looks for drywood termite frass, which often accumulates as small pellet piles below exit holes in roof sheathing or rafters. It also covers old house borer exit holes, powderpost beetle damage, and wood-decay fungi on the underside of the roof deck where inadequate ventilation has allowed moisture to accumulate. Many homeowners and even some general inspectors miss attic termite activity because they are not specifically looking for the signs. A licensed WDO inspector knows what to look for and where. Understanding how attic issues develop helps homeowners see why this area matters for both moisture management and pest risk simultaneously.
What Is the Biggest Enemy of Termites?
The biggest enemies of termites in nature are ants, particularly fire ants, which actively prey on termite swarmers and invade termite colonies. Certain parasitic nematodes and fungi also attack termites in the soil. In a practical home protection context, however, the biggest enemies of termites are moisture control and physical barriers. Subterranean termites need moisture to survive, and they need a path from the soil to the wood. Eliminating wood-to-soil contact, correcting drainage problems that keep the foundation damp, maintaining gutters to prevent water accumulation against the sill plate, and installing a vapor barrier in the crawl space all reduce the conditions termites need to establish and thrive.
Chemical termiticides applied as a continuous soil treatment barrier are the most effective human-controlled method of keeping subterranean termites out of a structure. Bait stations, which place toxicants in the soil for foraging workers to carry back to the colony, offer an alternative approach with lower chemical volume. Both methods require professional application and periodic inspection to confirm their effectiveness over time.
What Kills Termites Instantly in a House?
No residential treatment kills termites instantly throughout an entire infestation. What kills termites most effectively is a combination of direct-contact insecticides applied by licensed pest control operators and slow-acting treatments that workers carry back to kill the colony at its source. Liquid termiticides including Termidor (fipronil) are applied as a continuous barrier in the soil around the foundation. Workers that cross the treated zone pick up the chemical and transfer it to other colony members over days to weeks, eventually reaching and eliminating the queen. Fumigation, which involves tenting the entire structure and filling it with sulfuryl fluoride gas, kills all termites within the structure at the time of treatment but does not affect the underground colony or prevent reinfestation.
Common household products that are sometimes suggested as DIY treatments, including orange oil, boric acid, and diatomaceous earth, have very limited effectiveness against established subterranean infestations because they cannot penetrate the underground colony. These products may kill individual workers on contact but do not address the source of the infestation.
Which Smell Do Termites Hate?
Termites are repelled by certain essential oils and compounds, including cedarwood oil, vetiver oil, clove oil, and geranium oil. Research from the U.S. Forest Service has documented some natural compounds as having repellent properties against subterranean termites. However, repellents do not kill colonies and do not constitute effective treatment for an active infestation. They may deter termites from crossing a treated surface temporarily, but they offer no lasting protection for structural wood. Termite control for an established infestation requires licensed professional treatment, not natural repellents. These natural compounds are interesting from a research perspective but should not be relied upon as a substitute for professional inspection and treatment.
Termite Warning Signs by Location in Your Home
| Location | Warning Signs to Look For | Type of Termite Usually Indicated | Severity |
|---|---|---|---|
| Exterior foundation walls | Mud tubes running vertically up the foundation; damaged wood at base of siding | Subterranean | High; indicates active colony entry point |
| Crawl space floor joists and sill plate | Mud tubes, hollow wood, frass mixed with soil, damaged sill plate | Subterranean | Very high; primary zone of structural damage |
| Interior window and door frames | Hollow wood when probed, bubbling or uneven paint, stuck operation | Subterranean or drywood | Moderate to high |
| Attic rafters and sheathing | Small pellet piles beneath exit holes, discolored wood, frass | Drywood; also old house borers | Moderate; can spread broadly if untreated |
| Deck, porch, or fence posts | Hollow posts, mud tubes at soil contact, visibly deteriorated wood | Subterranean | Moderate; frequently the entry path to the main structure |
| Garage framing | Damaged baseboards, mud tubes along slab perimeter, hollow-sounding studs | Subterranean | Moderate to high |
| Near plumbing (bathrooms, kitchen, laundry) | Wood decay plus termite frass; damaged subfloor; soft spots underfoot | Subterranean; moisture-attracted | High; moisture amplifies damage rate |
Sources: Termite Specialist Authority WDO Inspection Guide; InterNACHI WDO Inspection Course materials; Orkin Termite Damage Statistics; National Pest Management Association; USDA Forest Service termite behavior data; Imperial Pest Prevention WDO Inspection process documentation.
What Would Fail a House Inspection Related to Termites?
On a termite inspection specifically, findings that most often derail or complicate a real estate transaction include confirmed live termite activity, structural wood damage that compromises load-bearing members, and evidence of active infestation in the crawl space framing or sill plate. For VA and FHA loans in particular, the lender requires a clear termite inspection report before closing. If a WDO report shows active infestation or visible structural damage, the lender typically requires treatment and repair before the loan will be approved. Cash buyers have more flexibility, but even cash buyers should understand what they are accepting before closing on a home with active termite activity.
The most costly termite-related finding is damage to the sill plate, floor joists, or structural posts in the crawl space that has been going on long enough to require replacement rather than treatment alone. According to Orkin, the average homeowner who discovers termite damage spends approximately $3,000 on repairs, but structural damage that has been allowed to progress for years can run significantly higher. Catching activity early through regular inspection is consistently less expensive than repairing damage that went undetected for a decade. Buyers who discover active termite conditions in an inspection report can use those findings to negotiate repairs or a price reduction before closing.
What’s the Worst Thing a Home Inspector Can Find Related to Termites?
The worst termite-related finding a home inspector or WDO inspector can make is active structural damage in load-bearing members, particularly when that damage has been concealed by cosmetic repair. A sill plate that has been eaten to near-nothing and then covered with fresh paint, floor joists that have been tunneled through and then patched over with wood filler, or a post in the crawl space that has been replaced but where the colony source was never treated are all scenarios that create serious concern. These findings indicate not only termite activity but also a history of concealment that raises questions about what else in the home has been hidden rather than fixed.
Severe structural termite damage in combination with active infestation is the condition most likely to produce a deal-breaker outcome in a real estate transaction, particularly if the damage affects the foundation support system. Buyers who encounter this finding should request an engineering evaluation of the affected structural members, not just a treatment quote from a pest control company. A guide to termite damage signs that homeowners miss covers many of the visual patterns that experienced inspectors recognize during this evaluation.
What Devalues a House Most?
What devalues a house most in terms of pest-related concerns is a history of untreated or recurring termite activity, particularly when structural repairs have been required. Homes with a history of termite damage typically see approximately a 20 percent decrease in perceived value according to property market analysis, because buyers and appraisers factor in the cost of ongoing treatment, the possibility of undiscovered damage, and the reduced structural integrity of components that have been replaced rather than rebuilt from scratch.
Active infestation at the time of sale is the most immediately damaging finding for property value because it cannot be negotiated around the way a completed repair can. A home where termites were treated five years ago and there has been no subsequent activity is a different conversation from a home where the inspector finds live mud tubes in the crawl space during the pre-purchase evaluation. Sellers in this situation typically need to fund both treatment and any required structural repair before their transaction can close on any financing with a lender. Sellers who order a pre-listing inspection that includes a WDO component can address these findings before buyers ever arrive with their own inspector.
What Is a Deal Breaker in a Home Inspection for Termites?
A deal breaker in a home inspection for termites is active infestation combined with structural damage in load-bearing components that the seller will not treat, repair, or reduce the price to reflect. Treatment alone is straightforward and relatively inexpensive. Structural repair in load-bearing members is significantly more costly and time-consuming. When a seller acknowledges that both are present and refuses to respond to the buyer’s request for treatment and repair credits, the buyer faces a choice between absorbing those costs or walking away. For most buyers using financing, the lender makes that choice for them by requiring clear termite inspection before funding.
Frequently Asked Questions
How Many Termites Are Considered an Infestation?
Any confirmed presence of live termites in a structure qualifies as an infestation, regardless of the colony size at the time of discovery. Subterranean termite colonies can range from a few thousand workers in a newly established colony to several million in a mature one. According to Orkin, a single small colony of 60,000 workers can consume approximately one linear foot of a 2×4 board in five months under normal conditions. A larger colony does far more damage faster. There is no minimum count required before treatment is warranted. If an inspector confirms live termites, treatment begins immediately.
What Does a “Clear” Termite Inspection Report Actually Mean?
A clear termite inspection report means the inspector found no visible evidence of wood-destroying organisms, active damage, or conducive conditions severe enough to require immediate action at the time of the inspection. It does not guarantee the home is 100 percent termite-free. Termites can be active in areas that were not accessible during the inspection, behind finished walls, or in underground galleries that have not yet produced visible surface evidence. A clear report is a professional confirmation of what was observable on the date of the inspection, not an absolute guarantee of the absence of all organisms.
Is Homeowner’s Insurance Likely to Cover Termite Damage?
No, standard homeowner’s insurance policies do not cover termite damage. The Insurance Information Institute confirms that most insurers categorize termite damage as a maintenance-related loss that is considered preventable with regular inspection and treatment. Because the damage accumulates slowly over time rather than resulting from a sudden covered event, it falls outside the scope of standard property insurance. This is a significant reason why regular termite inspections matter so much financially. Termite damage discovered after years of undetected activity is entirely the homeowner’s expense with no insurance backstop.
Should I Leave My House During a Termite Inspection?
You do not need to leave your house during a standard termite inspection. The inspection is a visual, non-invasive walkthrough of your home’s accessible surfaces. The inspector will ask you to stay out of the crawl space and attic while they are working in those areas, both for safety reasons and to avoid disturbing their observations. Attending the inspection in person and following the inspector through the walkthrough as they complete it is actually encouraged because findings are much easier to understand when explained in person in front of the actual condition.
How Often Should a Home Be Inspected for Termites?
Homes in moderate to high termite risk areas, including Missouri, should be inspected for termites at least once a year. Annual inspections allow a licensed inspector to detect new activity at the earliest possible stage, when treatment costs and repair costs are lowest. Homes that already have a termite treatment bond or active chemical barrier program typically include scheduled annual inspections as part of the bond agreement. Homes without a treatment program should prioritize annual inspection independently. According to Missouri data cited by ARC Home Inspections, 75 percent of Missouri homes show evidence of termite activity by the time they reach 40 to 50 years of age, making regular inspection a practical necessity rather than an optional precaution.
Can I Attend the Termite Inspection?
Yes, attending the termite inspection in person is strongly recommended. Seeing findings in person is significantly more informative than reading about them in a report afterward. When the inspector shows you a mud tube on the foundation wall or a section of hollow-sounding wood in the crawl space, you understand the finding immediately in context. You also have the opportunity to ask whether a condition is recent or historic, whether treatment is urgent or precautionary, and what the next steps should be before you leave that conversation. Buyers who attend both their general home inspection and their termite inspection are consistently better prepared to make decisions and negotiate effectively.
The Takeaway
A termite inspection is not a luxury or a formality. It is a systematic professional evaluation of every accessible wood surface in your home, conducted by a licensed inspector trained to recognize signs of infestation that no general home inspector, real estate agent, or untrained eye is equipped to catch. According to Orkin, termites cause approximately $5 billion in damage to U.S. homes annually, and most of that damage goes undetected until it has progressed significantly. In Missouri specifically, the combination of older housing stock, clay-heavy moisture-retaining soil, and year-round subterranean termite activity makes this inspection a necessary part of any real estate transaction and a worthwhile annual practice for homeowners already in their homes.
At ARC Home Inspections, we offer termite inspections as a standalone service and as an add-on to our general home inspection. Schedule your inspection today by calling or texting us, and we will make sure you know exactly what is in the wood before you close.
