Tenting for termites is safe when the process is carried out correctly, but the gas used during fumigation is genuinely dangerous, and the safety depends entirely on strict protocols being followed. The fumigant most commonly used, sulfuryl fluoride, is an odorless nerve toxin that can cause seizures and death at high concentrations. Between 2002 and 2023, at least 11 people died and two others were seriously injured during residential fumigations in California and Florida, prompting the EPA to mandate new safety measures in 2024.
So the short answer is: you won’t be harmed by a properly performed fumigation, but you need to understand what “properly performed” means and what your responsibilities are before, during, and after the process.
What the Fumigant Does
Sulfuryl fluoride is a colorless, odorless gas that spreads throughout a sealed structure, seeping into wall voids, cracks, wood, and fabric to reach termites wherever they’re hiding. Once inhaled, it’s rapidly absorbed into the bloodstream and affects the central nervous system. At dangerous concentrations, exposure can cause nausea, vomiting, chest tightness, slurred speech, numbness in the extremities, muscle twitching, seizures, and respiratory failure.
Because the gas has no smell, you would have no natural warning if you entered a structure that hadn’t been properly cleared. This is the core risk of fumigation, and the reason the entire process is built around preventing re-entry until gas levels drop to safe thresholds.
How the Process Works
A licensed fumigator seals your home under a large tent and releases the gas inside. The structure stays sealed for roughly 16 to 30 hours while the fumigant penetrates wood and other materials to kill drywood termites. After the exposure period, the crew opens the tent and aerates the home using fans and inlet devices for a minimum of 12 hours. In total, you should plan to be out of your home for about two to three days.
Before you’re allowed back in, the fumigator must test the air inside and certify that the gas concentration has dropped to 1 part per million or less. Only a licensed applicator can make this clearance determination. Updated EPA rules from 2024 now require longer active and passive aeration times for residential fumigations, site-specific fumigation logs, and clearly posted no-entry warning signs throughout the entire process.
Residues After Aeration
One of the genuine advantages of sulfuryl fluoride is that it dissipates completely as a gas. After proper aeration, it leaves no surface residue, odor, or film on your belongings. You don’t need to wash clothes, wipe down countertops, or clean children’s toys. Electronics, antiques, and sensitive fabrics are also unaffected.
There is one caveat worth knowing: when sulfuryl fluoride contacts proteins in food, it can leave behind fluoride residues. This is why all food must be removed or sealed before fumigation (more on that below). But hard surfaces, furniture, and fabrics in your home are not a concern once the air has been cleared.
What You Need to Remove or Protect
Preparing your home correctly is one of the most important things you can do to keep your family safe. All food, animal feed, medications, and drugs must either be removed from the house or double-bagged in special Nylofume bags, which are made from a nylon polymer film that blocks the gas. This includes everything in your refrigerator and freezer.
Items people commonly overlook:
- Cereal and snack boxes: The interior plastic bag inside cardboard packaging is not airtight, so these need to be bagged or removed.
- Spices: Any container without its original manufacturer’s airtight seal intact must be bagged or taken out.
- Eggs: Must be bagged or removed.
- Resealable containers: Tupperware and similar storage containers do not form airtight seals, so cottage cheese, leftovers, or anything stored in them needs protection.
- Aspirin and other oral medications: Anything you swallow counts as ingestible and must be bagged or removed.
- Pet food: Treat it exactly like human food.
- Ice cubes: Discard them and turn off your icemaker before the fumigation.
To double-bag properly, place one Nylofume bag inside another while both are empty. Put your items in the inner bag without overfilling, twist the top, fold it over, and secure it with a twist tie, tape, or rubber band. Repeat with the outer bag. Press gently on the sides afterward and listen for air leaks. No air should escape.
Pets, Plants, and Family
Every person, pet, and plant must be out of the home during fumigation. There are no exceptions. Remove all indoor plants and any potted plants on patios. Move them well away from the perimeter of your house so the tenting crew can work without obstruction. Fish tanks present a particular challenge since the gas can dissolve into water, so aquariums need to be relocated entirely.
Your family, including any overnight guests, needs alternate accommodations for a minimum of two to three days. Do not return until the licensed fumigator has officially cleared the structure. After clearance, the home is safe for everyone, including children and pets, without additional cleaning or waiting.
What Makes Fumigation Dangerous
Nearly every serious injury or death linked to residential fumigation has involved someone entering a treated structure before it was properly cleared. The EPA’s Inspector General investigation into the 11 deaths since 2002 identified several recurring problems: inadequate warning signage, faulty clearance devices that gave false “safe” readings, and gaps in training for applicators.
The 2024 label changes address these directly. Fumigation companies must now post conspicuous no-entry signs at all access points throughout the process, maintain detailed site-specific logs, and complete additional stewardship training sponsored by the product manufacturer. The EPA also removed references to previously “approved” clearance devices from product labels after finding that some portable devices were not reliably detecting residual gas.
Sulfuryl fluoride is classified as a restricted-use pesticide, meaning only a certified applicator or someone under their direct supervision can legally perform the fumigation. If a company can’t show you current certification, that’s a serious red flag.
How to Verify the Job Was Done Safely
You have every right to ask your fumigation company specific questions before and after the process. Before signing a contract, confirm that the company is using updated product labels that reflect the 2024 EPA requirements. Ask what clearance device they use and how they verify it’s working accurately. After aeration, request a copy of the site-specific fumigation log, which companies are now required to maintain for residential jobs.
The gas concentration inside your home must measure at 1 ppm or below before anyone is allowed back in. If the fumigator seems to rush this step or can’t provide clear documentation of the clearance reading, do not enter the home. The aeration timeline is not something that can be shortened for convenience. Existing stocks of products with older label language can legally be sold through mid-2025, so asking which label version your company is working from is a reasonable question during this transition period.