Termite Swarm in My House: What to Do (2026)

Last updated: April 9, 2026

By Pest Control Pricing Team

A termite swarm inside your home is one of the most serious pest situations a homeowner can face. It means an active, mature colony has been living inside the structure of your house for at least 3 to 5 years and has grown large enough to produce reproductive swarmers. This is not a minor issue, but it is solvable. Here is what to do in the next 24 hours. Call (866) 821-0263 to schedule an inspection.

What Should I Do in the Next 24 Hours?

Finding a termite swarm inside your home is alarming, but the steps you take in the next day matter more than how quickly you panic. The colony has been there for years, so a measured, strategic response is more effective than a rushed one. Here is exactly what to do, in order.

1. Do NOT Spray the Swarmers

This is the most important instruction. The swarmers (winged termites) you see flying around your living room, kitchen, or bathroom are harmless reproductive termites. They do not eat wood. They do not bite. They will die within hours once they lose their wings and cannot find soil. Your instinct will be to grab a can of bug spray and kill them all. Resist that instinct. Spraying them serves no purpose and actually makes things worse for three reasons.

First, the swarmers are not the problem. They are symptoms of the problem. The actual colony, the tens of thousands of worker termites consuming your wood, is hidden deep inside the walls. Killing the swarmers does nothing to the colony. Second, an inspector needs the swarm evidence to identify the termite species. Different species require different treatment approaches, and having intact specimens is the fastest way to confirm identification. Third, consumer insecticide sprays can leave chemical residue that interferes with professional termiticide products. If you spray around the swarm emergence point, you may compromise the effectiveness of the professional treatment that will follow.

2. Collect 5 to 10 Specimens in a Sealed Plastic Bag

Pick up several swarmers (alive or dead) and place them in a ziplock bag or glass jar. If you missed the live swarmers, collect discarded wings, which pile up near the emergence point and on window sills. Wings are sufficient for species identification. Seal the container and keep it for the inspector. Having physical specimens speeds up the identification process and eliminates any uncertainty about what you are dealing with.

3. Note Exactly Where They Emerged

Pay close attention to where the swarmers are coming from. They emerge through small holes in drywall, gaps in baseboards, cracks in hardwood flooring, window sill joints, and other openings that connect the interior of the wall to the living space. The emergence point tells the inspector where the colony is located within the structure. Write down the exact location: which room, which wall, the specific section of baseboard or window frame. If swarmers emerged from multiple locations, note all of them.

4. Take Photos of the Swarm Location

Document everything with photos. Photograph the swarm itself if it is still active, the emergence point, any discarded wing piles, any visible mud tubes on walls or foundation, and any wood that appears damaged. These photos serve multiple purposes: they help the inspector assess the situation before arriving, they document the condition for any future insurance or legal purposes, and they provide a baseline for monitoring treatment progress.

5. Call 2 to 3 Pest Control Companies for Inspections

Contact at least 2 to 3 licensed, reputable pest control companies and schedule termite inspections. Many companies offer free termite inspections. Getting multiple inspections is important because it gives you different perspectives on the scope of the problem and allows you to compare treatment recommendations and pricing. Do not sign a contract with the first company that inspects. The urgency is real, but you have time to make an informed decision.

6. Do NOT Panic

The structural damage that has occurred during the 3 to 5+ years the colony has been active is already done. Another 3 to 5 days to arrange proper inspections and make an informed decision will not meaningfully increase the damage. Termites consume wood slowly, roughly 1/5 of an ounce per day for a colony of 60,000 workers. The swarm is a wake-up call, but it is not an emergency that requires signing a contract tonight. Take a breath, follow these steps, and make a careful choice about treatment.

What Does a Termite Swarm Actually Mean?

To understand why an indoor termite swarm is serious, you need to understand what a swarm is and what it tells you about the colony in your home.

What Are Swarmers?

Termite swarmers (also called alates) are the reproductive members of a termite colony. They have wings, eyes, and darker coloring than the pale worker termites that actually eat wood. Their sole purpose is to leave the parent colony, pair with a mate, and establish a new colony elsewhere. They do not eat wood, do not bite, and pose no direct threat to your home. Once they swarm, they shed their wings and most of them die within hours if they cannot reach soil.

Why Does a Swarm Mean the Colony Is Old?

A termite colony does not produce swarmers until it is mature. For subterranean termites, the most common type that infests homes, this takes 3 to 5 years minimum. The colony must grow to a population of approximately 60,000 to several hundred thousand workers before it has the resources to produce reproductive swarmers. Some species and some individual colonies take even longer. The bottom line is that if swarmers are emerging inside your home, the colony that produced them has been consuming wood in your structure for at least 3 years and possibly much longer.

What Does an Indoor Swarm Tell You?

The location of the swarm tells you where the colony is. Termite swarmers follow light and warmth, so they fly toward windows and light sources. But the critical detail is where they enter the living space. Swarmers emerge from the colony through small openings in walls, floors, and trim. An indoor swarm, where swarmers are appearing inside your home rather than outside around the foundation, means the colony is inside the structure of your home. They are not coming from the yard, a tree stump, or a woodpile. They are coming from your walls, floor joists, or foundation framing.

This is an important distinction. An outdoor swarm near your home suggests a colony in the soil near your foundation, which may or may not have reached the structure. An indoor swarm confirms the colony has been feeding on your home's structural wood for years. For more on recognizing termite activity, see our guide on signs of termites.

How Do I Tell Termite Swarmers from Flying Ants?

This is a critical identification step because the response to a termite swarm is very different from the response to a flying ant swarm. Many ant species also produce winged reproductive swarmers, and the two are commonly confused. Here is how to tell them apart.

The easiest identification method is the wing test. If you find a pile of discarded wings near a window sill and the wings are all the same size, you have termite swarmers. Termite wings break off at the base with very little pressure, so post-swarm evidence is almost always a pile of loose wings rather than intact insects. Flying ants retain their wings.

The second easiest method is the waist test. Pick up one of the insects (alive or dead) and look at the connection between the thorax and abdomen. Termites have a thick, straight waist with no visible pinching. Ants have a distinctly narrow, pinched waist, often with visible segments. This difference is visible with the naked eye on most specimens.

If you cannot confidently identify what you have, place several specimens in a sealed bag and show them to a pest control inspector. Correct identification is essential because the treatment for termites is entirely different from the treatment for ants, and the urgency level is different as well.

Why Should I NOT Spray Them?

The temptation to spray termite swarmers is strong, but it is important to understand why spraying does more harm than good. There are four specific reasons to leave the swarmers alone.

The Swarmers Are Not the Problem

Swarmers do not eat wood. They are reproductive termites whose only function is to fly, mate, and start new colonies. The actual damage to your home is being done by the worker termites, which are pale, soft-bodied, wingless insects that live hidden inside the wood and soil. Killing swarmers has zero impact on the worker population. Every swarmer you kill would have died on its own within hours anyway. The colony underground or inside your walls continues feeding uninterrupted.

You Are Destroying Evidence

The swarmers, their wings, and the emergence point are the primary evidence that allows an inspector to identify the termite species and locate the colony. Different termite species require different treatment methods. Subterranean termites are treated with liquid barrier applications and bait stations. Drywood termites may require fumigation. Without intact specimens, the inspector may need to do more extensive investigation to determine what species is present, which can delay treatment.

Chemical Residue Interferes with Treatment

Consumer insecticide sprays (Raid, Hot Shot, Home Defense) contain pyrethroid compounds that leave a chemical residue on surfaces. If you spray around the swarm emergence point, this residue can interfere with the professional termiticide that will be applied during treatment. Modern termiticides like Termidor (fipronil) work through a transfer effect: termites contact the treated soil, then transfer the product to other colony members through normal grooming and contact. Pyrethroid residue from consumer products can repel termites from treated areas, reducing the effectiveness of the professional product.

Spraying Creates a False Sense of Security

Some homeowners spray the swarmers, see no more bugs, and assume the problem is solved. This is dangerous. The swarm event typically lasts only 30 to 45 minutes. Whether you spray or not, the swarmers will stop appearing because the swarm is a single event, not an ongoing infestation of the living space. The colony inside your walls is completely unaffected by any consumer spray product. Homeowners who spray and then do not follow up with professional treatment allow the colony to continue feeding on their home for months or years, causing significantly more damage.

Where Did the Swarm Come From?

Finding the exact emergence point of the swarm helps the inspector locate the colony within your home's structure. Here are the most common emergence locations and what each one suggests about the colony's location.

Window Sills

Swarmers emerging from or near window sills suggest the colony is in the wall framing around the window, the sill plate below, or the header above. Window frames are common termite entry points because the wood is often close to or in contact with the exterior environment, and moisture tends to accumulate around windows due to condensation, rain exposure, and caulk failures.

Baseboards

Swarmers appearing along baseboards indicate the colony is in the wall framing behind the baseboard, the bottom plate of the wall, or the subfloor beneath. Baseboards are where the wall meets the floor, and this junction is a natural travel route for subterranean termites moving between the soil and the wood framing.

Hardwood Floor Joints

Swarmers emerging from gaps between hardwood floor boards suggest the colony is in the subfloor, floor joists, or the framing beneath the floor. This often indicates that termites have accessed the floor structure from below, either through the crawl space, the basement, or through a slab crack.

Foundation Walls in Basement

Swarmers in the basement, especially near the top of the foundation wall where the wood framing meets the concrete, indicate the classic subterranean termite entry point. Termites build mud tubes up the foundation wall to reach the wood sill plate. If you see swarmers in this area, look for mud tubes on the interior or exterior foundation walls. These pencil-width mud tubes are the highways termites build to travel between the soil and the wood.

Around Bathroom and Kitchen Plumbing

Plumbing penetrations through floors and walls provide direct pathways between the soil and the wood framing. Moisture from leaking pipes or condensation around plumbing further attracts termites. Swarmers emerging near bathrooms, kitchen sinks, or laundry areas often indicate a colony that entered through a plumbing chase or penetration point.

Regardless of where the swarmers appeared, look for mud tubes near the emergence point. Mud tubes are pencil-width, brownish trails of soil-like material that termites build to maintain a humid, protected pathway between the soil and the wood. The presence of mud tubes confirms subterranean termites and helps the inspector trace the colony's path through the structure. For a complete guide to recognizing termite evidence, see signs of termites.

How Urgent Is This Really?

This section addresses the emotional reality of finding a termite swarm in your home. You are scared, you feel the house is being eaten from the inside, and you want this fixed today. Those feelings are valid. But making good decisions requires separating urgency from panic.

The Colony Has Been There for Years Already

The colony that produced the swarm you just witnessed has been feeding on your home for at least 3 to 5 years. During that time, it consumed wood slowly. Subterranean termites eat approximately 1/5 of an ounce of wood per day per colony of 60,000 workers. That is roughly 5 pounds of wood per year. Over 3 to 5 years, that is 15 to 25 pounds of wood consumed. This is significant but not catastrophic for a structure that contains many thousands of pounds of lumber.

Another Few Days Will Not Change the Outcome

The difference between treating today and treating five days from now is negligible. At 1/5 of an ounce per day, the colony will consume roughly one additional ounce of wood during the time it takes you to schedule inspections, compare quotes, and make an informed decision. That additional ounce of damage is invisible. What matters is getting the right treatment, from the right company, at a fair price, and that requires a few days of due diligence.

Do Not Let Urgency Pressure You into a Bad Contract

Some pest control companies use high-pressure sales tactics with termite swarm calls, knowing that homeowners are frightened and feel desperate. They may tell you the house is in danger of structural failure, that you need treatment immediately, or that the price goes up if you wait. While termite damage is serious and does require professional treatment, it is almost never an emergency that requires signing a contract on the spot. Any company that pressures you to commit immediately without giving you time to get other inspections should be viewed with caution.

But Do Not Wait Weeks or Months

Taking a few days to get multiple inspections is smart. Taking a few months to "think about it" is not. Every day the colony remains active, it is consuming more of your home's structure. The longer you wait, the more extensive (and expensive) the damage repair will be. Schedule your inspections within the first week, compare quotes within the second week, and begin treatment within 2 to 3 weeks of the swarm event.

What Will the Inspector Do?

A professional termite inspection is a thorough, systematic examination of your home's structure. Here is what to expect during the inspection process so you can evaluate each company's thoroughness and professionalism.

Full Inspection of the Foundation

The inspector will walk the entire exterior perimeter of your home, examining the foundation wall for mud tubes, wood-to-soil contact, moisture issues, and signs of termite activity. They will probe any visible wood near the foundation with a screwdriver or probing tool, looking for soft, damaged wood that indicates feeding. In homes with a basement, they will inspect the interior foundation walls, sill plates, rim joists, and any exposed wood framing in the basement.

Crawl Space Inspection

If your home has a crawl space, the inspector will enter it and examine the floor joists, subfloor, support posts, and foundation walls from the underside. This is often where the most extensive termite damage is found because the crawl space provides a direct connection between the soil and the wood framing. A thorough inspector will spend significant time in the crawl space. Be cautious of companies that skip the crawl space or give it a cursory glance.

Interior Inspection

Inside the home, the inspector will check window sills, door frames, baseboards, and any areas where the swarmers emerged. They may use a moisture meter to detect elevated moisture levels in walls, which can indicate termite activity or conditions conducive to termite feeding. They will also check bathrooms, the kitchen, and any areas near plumbing for signs of termite entry.

Attic Inspection

A thorough inspector will also check the attic for signs of drywood termites (if applicable to your region) and for termite damage that may have traveled from the foundation up through the wall framing to the roof structure. While most subterranean termite damage concentrates in the lower portions of the structure, severe or long-standing infestations can extend significantly higher.

Species Identification

Using the specimens you collected and any live termites or evidence found during the inspection, the inspector will identify the species. The three most common species that infest homes are Eastern subterranean termites (most common in the eastern U.S.), Formosan subterranean termites (aggressive species found in the southeastern U.S.), and drywood termites (found in coastal and southern regions). The species determines the treatment method.

Damage Assessment

The inspector will assess the scope and severity of the damage. This includes probing wood members to determine how deeply the termites have fed, identifying which structural members are affected, and providing an opinion on whether structural repair is needed. Not all inspectors include detailed damage assessment in a free inspection. Some companies charge for a written damage report, which is separate from the treatment quote.

Written Report and Treatment Recommendation

After the inspection, the company should provide a written report detailing what was found, which areas are affected, which species is present, and what treatment they recommend. The report should also include a price quote with the treatment method, products to be used, warranty terms, and any ongoing monitoring costs. Get this in writing from each company before making a decision.

For guidance on evaluating pest control companies, see how to find a good exterminator. For inspection pricing specifically, see our termite inspection cost guide.

What Are the Treatment Options?

There are three primary treatment methods for termites in a home. The right choice depends on the termite species, the extent of the infestation, your home's construction, and your budget.

Liquid Barrier Termiticide ($1,200 to $3,000)

Liquid barrier treatment is the most common and well-established termite treatment method. The technician digs a shallow trench around the entire exterior perimeter of the home's foundation and injects termiticide into the soil. The goal is to create a continuous treated zone around the foundation that termites cannot cross without contacting the product. Inside the home, liquid may be injected through small holes drilled in the basement or slab floor near the foundation walls.

The most widely used liquid termiticide is Termidor (fipronil). Termidor works through a "transfer effect": termites that contact the treated soil do not die immediately. Instead, they return to the colony and transfer the product to other termites through normal grooming and contact. This colony transfer effect means the product reaches termites deep inside the structure that never contacted the treated soil directly. Termidor provides protection for 5 to 10+ years.

Liquid treatment provides immediate protection. From the day the treatment is applied, any termite traveling through the treated soil zone is exposed to the product. This makes liquid treatment the preferred method when active feeding needs to be stopped quickly.

Bait Station System ($1,500 to $3,500)

Bait station systems (such as Sentricon and Trelona) use a different approach. Stations are installed in the soil at regular intervals around the home's perimeter, typically every 10 to 15 feet. Each station contains a cellulose matrix treated with a slow-acting insecticide (commonly noviflumuron or hexaflumuron). Termites find the stations during normal foraging, feed on the bait, and carry it back to the colony. The slow-acting nature of the bait ensures it spreads through the colony before killing, reaching the queen and eventually eliminating the entire colony.

Bait systems take longer to achieve results than liquid treatment, often 2 to 6 months for colony elimination. However, they are less disruptive to install (no trenching around the foundation), they can reach colonies that a liquid barrier cannot, and they eliminate the colony entirely rather than just blocking its access to the structure.

Bait systems require ongoing monitoring, typically quarterly, at an annual cost of $200 to $400. The monitoring visits ensure stations are replenished and functioning. This ongoing cost is a factor in long-term budgeting.

Fumigation (Drywood Termites Only)

Fumigation is only used for drywood termites, which live entirely inside the wood without soil contact. If you are in a coastal or southern region and the inspection identifies drywood termites, fumigation may be recommended. The process involves tenting the entire home with tarps and introducing a fumigant gas (vikane/sulfuryl fluoride) that penetrates all wood throughout the structure. The home must be vacated for 2 to 3 days.

Fumigation costs $4 to $8 per square foot, or roughly $4,000 to $8,000+ for a typical home. It is the most expensive treatment option but is the only method that reliably eliminates drywood termite colonies throughout an entire structure. Subterranean termites are never treated with fumigation because the colony is in the soil, which the fumigant does not reach.

For detailed treatment pricing, see our termite treatment cost guide. For fumigation-specific information, see our fumigation cost guide. For subterranean termite treatment details, see our subterranean termite treatment cost guide.

How Much Will This Cost?

The total cost of dealing with a termite swarm breaks down into two categories: treatment costs and damage repair costs. These are separate expenses, and the repair costs are often higher than the treatment itself.

Treatment Costs

Damage Repair Costs

Damage repair is a separate expense from treatment and varies enormously depending on the extent and location of the damage. Minor damage to non-structural trim or baseboard may cost a few hundred dollars to repair. Major structural damage to floor joists, sill plates, or support beams can cost tens of thousands of dollars.

The scope of damage repair is not always apparent until treatment is complete and the damaged areas are opened up for inspection. Some companies offer a preliminary damage assessment as part of the inspection, but a full assessment often requires removing drywall, flooring, or siding to expose the framing.

Why Getting 3 Quotes Matters

Termite treatment pricing varies significantly between companies, and the recommended treatment method can also differ. One company may recommend liquid treatment while another recommends bait stations. One may quote $1,500 while another quotes $3,500 for the same home. Getting 3 quotes allows you to see the range of recommendations and pricing, ask each company to explain their approach, and identify any outliers (either unusually high or suspiciously low). The cheapest quote is not always the best value. Focus on the thoroughness of the inspection, the reputation of the company, the warranty terms, and the treatment method.

For more on termite damage repair costs, see our pest damage repair cost guide.

Does Insurance Cover Termite Damage?

In almost all cases, no. Standard homeowners insurance policies explicitly exclude termite damage from coverage. Insurance companies classify termite damage as a "maintenance issue" rather than "sudden and accidental damage," which is the standard coverage trigger for homeowners policies.

The insurance industry's reasoning is that termite damage develops slowly over years, is preventable through regular inspections and treatment, and is therefore the homeowner's responsibility rather than an insurable risk. This exclusion is nearly universal across insurance carriers and policy types.

Are There Any Exceptions?

A very small number of situations may result in partial coverage:

• Sudden structural collapse: If termite damage causes a sudden, unexpected structural failure (such as a porch collapsing), the collapse itself may be covered as an "accident," even though the underlying termite damage is not. This is extremely rare and depends entirely on your policy language and your carrier's interpretation.
• Water damage resulting from termite damage: If termites damage a plumbing pipe and the resulting water leak causes additional damage, the water damage portion may be covered while the termite damage is not. Again, this is highly policy-specific.
• Termite bonds: A termite bond (also called a termite warranty) is a service agreement with a pest control company, not an insurance policy. It typically covers annual inspections, retreatment if termites return, and in some cases, repair of damage that occurs during the warranty period. Termite bonds cost $200 to $400 per year and are the closest thing to "insurance" for termite damage.

For a thorough explanation of coverage and alternatives, see are termites covered by homeowners insurance.

Do I Have to Disclose This When Selling?

Yes. In virtually every state, sellers are legally required to disclose known termite damage, termite history, and any termite treatment to potential buyers. This disclosure is typically made through a standardized seller's disclosure form that is part of the real estate transaction.

What Must Be Disclosed

• Any known history of termite infestation
• Any termite treatment that has been performed, including dates, methods, and companies
• Any termite damage that exists, whether repaired or not
• Any current termite warranty or bond in effect
• Results of any termite inspections

Consequences of Non-Disclosure

Failing to disclose known termite damage or history can result in legal liability after the sale. Buyers who discover undisclosed termite damage can sue the seller for repair costs, reduced property value, and in some states, additional damages for fraud or misrepresentation. Given the potential costs of litigation and damages, full disclosure is both legally required and practically wise.

How Treatment Helps Your Sale

Having a termite problem treated, documented, and under warranty actually helps rather than hurts a home sale. Buyers understand that termites are common, and a home that has been professionally treated with a current warranty demonstrates that the problem has been addressed. A clear termite letter (also called a Wood-Destroying Insect Report or WDI report) from a licensed pest control company is often required by lenders and reassures both the buyer and the bank.

Homes sold without a termite clearance letter often require one before the lender will approve the loan, which can delay or complicate the closing. Having treatment completed and documented in advance streamlines the process.

How Can I Prevent Future Termite Problems?

After treatment, ongoing prevention reduces the risk of reinfestation. While no prevention method is 100% guaranteed, these steps make your home a less attractive target.

• Eliminate wood-to-soil contact: Remove any wood that touches the soil around your home, including landscape timbers against the foundation, firewood stacked against the house, and fence posts that contact both the structure and the ground.
• Maintain a gap between soil and siding: There should be at least 6 inches of visible foundation between the soil grade and the bottom of the siding or stucco. Mulch, soil, or landscaping piled up against the siding creates a hidden pathway for termites.
• Fix moisture problems: Repair leaking faucets, fix downspouts that dump water near the foundation, ensure sprinklers do not spray the foundation, and maintain proper drainage away from the home. Termites are attracted to moisture.
• Maintain your termite warranty: If your treatment includes an annual warranty renewal, keep it active. The annual inspection catches new activity early, and the warranty covers retreatment if termites return. The $200 to $400 annual cost is minimal compared to the cost of a new infestation.
• Annual inspections: Even if you do not have a warranty, schedule a professional termite inspection every year or two. Early detection is the key to minimizing damage and treatment costs.

For ongoing protection options and pricing, see our pest control plans cost guide. For a broader view of costs, see the pest control cost pillar page.

Related Resources

• Termite Treatment Cost: 2026 Pricing Guide
• Termite Inspection Cost
• Signs of Termites
• Subterranean Termite Treatment Cost
• Fumigation Cost
• Pest Damage Repair Cost
• Are Termites Covered by Homeowners Insurance?
• Pest Control Cost: Complete 2026 Guide
• When to Call an Exterminator
• How to Find a Good Exterminator

Frequently Asked Questions