7 Fumigation Myths South Florida Homeowners Should Stop Believing

Fumigation, or tenting, is the most thorough way to wipe out drywood termites that have spread through a house, but it is not the only option, it does not leave your home coated in chemicals and it does not protect you from future termites. Those are three of the most common misunderstandings, and they lead people either to put off a treatment they need or to pay for one they do not.

Drywood termites are a constant problem in South Florida, where the West Indian drywood termite thrives in older buildings. This guide separates fact from fiction on seven fumigation myths, using guidance from University of Florida termite researchers and the National Pesticide Information Center, so you can make a clear decision with your inspector.

What Termite Fumigation Actually Is

During a structural fumigation, the building is covered with tarps, a fumigant gas is released inside and held there long enough to penetrate the wood, and the structure is then aerated. In Florida homes, the fumigant is usually sulfuryl fluoride, a colorless, odorless gas that is highly toxic. The EPA classifies these products as restricted use pesticides, so only certified applicators can use them.

Florida adds its own rules. Under Florida Administrative Code rule 5E-14.108, a general fumigation must be personally directed, supervised and performed by a certified fumigation operator or a designated special identification cardholder, and two trained people must be present for key stages such as releasing the gas and starting aeration.

Fumigation targets drywood termites, which live inside the wood of the structure. If you are not yet sure which termites you have, read drywood vs. subterranean termites first, because the answer decides whether tenting makes sense at all.

Myth 1: Fumigation Is the Only Way to Treat Drywood Termites

Fact: Tenting is one option among several.

UF/IFAS explains that when a drywood colony is localized, a spot treatment may be enough. When colonies are spread through a structure, tenting and fumigation is the most cost-effective solution. Localized options include:

• Drilling into infested wood and injecting insecticide into the galleries
• Injecting through the kick-out holes where pellets come out, when they can be found
• Borate or insecticide sprays and foams on exposed, susceptible wood
• Heat treatment of a single room or apartment

The catch is that drywood colonies are hidden in wood, which makes them hard to find and treatment success hard to confirm. A spot treatment only works on colonies you know about. If pellets keep showing up in several rooms, in wall voids or in attic areas you cannot reach, fumigation treats all the wood at once. Our article on why drywood termite damage is so hard to spot explains why colonies are often missed.

Myth 2: Fumigation Leaves a Chemical Residue on Everything

Fact: Sulfuryl fluoride works as a gas and then leaves.

According to the National Pesticide Information Center, residues are not expected to remain on surfaces after structural fumigation. After the exposure period, the tarps come off, the house is aerated and the applicator tests the air. Occupants may not re-enter until those checks are complete and the gas is at or below the EPA limit of 1 part per million.

That is why you are not usually asked to wash every dish, towel and countertop afterward. What does need protection beforehand is anything you will eat or swallow, which brings up the next myth.

Myth 3: You Have to Throw Out Your Food and Medicine

Fact: You bag it or take it with you.

Food, pet food and medicines that are not sealed in glass, metal or plastic with the manufacturer’s airtight seal intact must be removed or double-bagged, and that includes items in the refrigerator and freezer. The fumigation company generally provides the special bags. Unopened cans and factory-sealed bottles usually stay as they are.

Myth 4: Fumigation Protects Your Home From Future Termites

Fact: Fumigation has no residual effect.

The same quality that makes fumigation reassuring, that the gas leaves, means nothing stays behind to stop the next generation. The University of California IPM program notes that fumigants have no residual effect. Once the house is aerated, new drywood swarmers can fly in and start colonies. UF/IFAS notes that the West Indian drywood termite’s mating flights run mainly from April to June but can happen at any time of year, and that complete exclusion of swarmers from a building is almost impossible.

Infested items can also bring termites back in. A secondhand dresser or a wooden frame with a colony inside starts the clock again. Read how drywood termites sneak in through furniture and wood trim before you bring home antiques or used furniture.

What protects you after tenting is regular inspection, sealing and painting exposed wood, screening vents, and treating any new colony early, often with a spot treatment rather than a second tent.

Myth 5: Tenting Will Get Rid of Subterranean Termites Too

Fact: Tenting does nothing to a colony in the soil.

Subterranean termites, including the Formosan and Asian species common in South Florida, nest in the ground and reach the house through mud tubes. As a UF/IFAS termite scientist puts it, fumigation is useless for them, because the rest of the colony can move right back in after the tent is removed. Subterranean termites are controlled with baits or soil-applied liquid termiticides instead.

If your inspector finds both kinds, you may need both treatments. This is one of the reasons termites can be difficult to treat: one plan rarely fits every colony on a property.

Myth 6: Fumigation Will Damage Your Home and Belongings

Fact: When the preparation instructions are followed, the structure and its contents are not the target.

Sulfuryl fluoride is not flammable at room temperature, but you will be asked to turn off pilot lights and open flames and to unplug heating elements and appliances with automatic switches. Houseplants must go too, along with all people and pets. Fumigators use a warning agent, commonly chloropicrin, to make sure no person stays inside, and the structure is secured with warning signs posted until it is cleared.

Problems usually come from skipped steps, not from the gas itself: a forgotten plant, an unbagged bag of chips, a pet left behind. Ask your company for its written preparation list and follow it.

Myth 7: You Can Do It Yourself or Wait It Out

Fact: Neither works.

Fumigants are restricted use pesticides, and Florida requires certified fumigation operators to run every general fumigation. Store-bought sprays only reach termites on the surface, not the colonies deep in framing and trim. Our article on why DIY termite treatments fail explains the problem in detail.

Waiting is just as costly. UF/IFAS estimates that the West Indian drywood termite alone accounts for about $140 million a year in treatment costs in Florida, and every season a colony is left alone it keeps hollowing wood and producing swarmers.

How Toro Decides Between Tenting and a Non-Tenting Treatment

Every Toro termite control job starts with a free inspection. A trained technician identifies the species and maps how far the activity goes, then recommends the option that fits:

• TORO-GUARD, Toro’s non-tenting injection treatment, for localized drywood colonies, so you do not have to leave your home.
• Tent fumigation when drywood termites have spread through the structure, treating all the wood at once, including walls, trim and furniture.
• The Sentricon baiting system if the inspection finds subterranean termites, installed around the property with no drilling into the slab and no trenches.

If fumigation is the right call, Toro walks you through every preparation step before the day of treatment, and everyone, including pets, stays out until the structure has been cleared for re-entry. Learn more about the West Indian drywood termite in our pest library. Toro has served Miami-Dade, Broward, Palm Beach and the Keys since 1969, and if the bugs come back, so will Toro, at no additional cost to you.

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Frequently Asked Questions

Educational content. This article is for general information about pests in South Florida and is not medical, legal or professional advice. If you have a bite, sting or allergic reaction, contact your doctor; in an emergency, call 911. Pest problems vary from home to home, so a licensed professional should inspect before treatment. When using any pesticide, always read and follow the product label.

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