Fumigation can kill mice, but it’s rarely the right tool for the job. Sulfuryl fluoride, the gas used in tent fumigation, is highly toxic to rodents at the concentrations used in residential treatments (1,440 to 3,850 parts per million). However, fumigation was designed primarily for termites and wood-boring insects, and using it solely to eliminate a mouse problem would be like hiring a demolition crew to hang a picture frame. There are far more effective, affordable, and practical ways to deal with mice in your home.
Why Fumigation Is Overkill for Mice
Tent fumigation involves sealing your entire home under a gas-tight tarp and flooding it with sulfuryl fluoride for 16 to 30 hours. The gas penetrates walls, attics, and crawl spaces, killing nearly anything living inside the structure. That includes mice, yes, but also means you and your family must vacate the home for two to three days. All food, medicine, and living things (pets, houseplants) must be removed or specially sealed beforehand.
After the gas has done its work, fans and ventilation devices run for a minimum of 12 hours to clear the air. A licensed fumigator must then test and certify that gas levels have dropped to 1 part per million or less before anyone can re-enter. Secondary locks are placed on all exterior doors during the process so no one accidentally walks into a lethal environment. The fumigator posts a formal reentry notice only after the structure is confirmed safe for occupancy.
All of this infrastructure exists because fumigation is a serious, whole-structure treatment. It makes sense when you’re dealing with drywood termites that have colonized the framing of your house and can’t be reached any other way. For mice, which can be targeted directly with traps and exclusion work, the disruption and expense of fumigation simply don’t add up.
What Fumigation Costs Compared to Mouse Control
Tent fumigation for a typical single-family home runs between $1,200 and $3,500 or more, depending on the size of the structure and your region. Standard mouse extermination, by contrast, averages $79 to $242. Even complex infestations where mice have nested inside walls, foundations, or vents cost significantly less than fumigation, though they do push the price higher than a straightforward case where activity is limited to one or two rooms.
The cost gap matters because fumigation doesn’t solve the underlying problem. The gas kills mice that are present during treatment, but once the tent comes off and your home is aerated, new mice can walk right back in through the same entry points. You’d spend thousands of dollars only to find yourself in the same situation weeks later.
What Actually Works for a Mouse Infestation
Effective mouse control combines two things: reducing the current population and sealing the building so new mice can’t enter. Neither requires fumigation.
Snap traps remain the most reliable way to kill mice already inside your home. They’re inexpensive, reusable, and give you clear confirmation that a mouse has been caught. Place them along walls, behind appliances, and near any areas where you’ve seen droppings or gnaw marks. Mice tend to travel the same paths repeatedly, hugging baseboards and edges rather than crossing open floor space. Peanut butter, chocolate, or nesting materials like cotton balls make effective bait.
Bait stations containing rodenticide are another option, particularly for larger infestations. These tamper-resistant boxes allow mice to enter and consume poison bait while keeping children and pets out. The downside is that poisoned mice often die inside walls or other inaccessible spaces, which can create odor problems for a week or two as the carcass decomposes.
Exclusion is the step that actually prevents the problem from recurring. Mice can squeeze through gaps as small as a quarter of an inch, roughly the diameter of a pencil. Common entry points include gaps around pipes and utility lines, cracks in the foundation, spaces under garage doors, and openings where siding meets the roofline. Steel wool, copper mesh, caulk, and metal flashing are all effective materials for sealing these gaps because mice can’t chew through them the way they chew through wood, plastic, or spray foam alone.
When a Professional Exterminator Makes Sense
A small mouse problem (one or two mice, limited droppings in a defined area) is something most homeowners can handle with a few well-placed traps and some gap-sealing. Larger infestations are a different situation. If you’re hearing scratching in multiple walls, finding droppings throughout the house, or repeatedly catching mice without the numbers declining, a pest control professional can assess the scope of the problem, identify entry points you might miss, and deploy a more systematic trapping and exclusion plan.
The cost of professional mouse control scales with the severity of the infestation and the number of follow-up visits required. More mice means more traps, more bait, and more frequent technician visits. But even on the higher end, dedicated rodent control remains a fraction of what fumigation would cost and addresses the actual cause of the problem rather than just killing whatever happens to be inside the house on a given day.
The One Scenario Where Fumigation Overlaps
If your home is already being fumigated for termites and you also happen to have mice, the treatment will kill any rodents present in the structure during the process. Sulfuryl fluoride is labeled for use against rodents in addition to its primary targets (drywood termites, Formosan termites, wood-boring beetles, bedbugs, cockroaches, and carpet beetles). So fumigation does double duty in that specific circumstance. But scheduling a full tent fumigation for the sole purpose of eliminating mice is something no reputable pest control company would recommend. The method doesn’t prevent re-entry, costs ten to twenty times more than targeted rodent control, and forces you out of your home for days.