Tenting a Fresno home, explained day by day
What each day of a fumigation involves: prep, the tent, airing out, and a clearance test before anyone steps back inside.
When a tent is the right call
Termite fumigation in Fresno exists for one problem: drywood termites that have spread too far to treat board by board. Maybe frass — the sawdust-looking pellets drywood termites push out of the wood — is showing up in several rooms. Maybe the galleries, the tunnels termites chew inside lumber, run through walls nobody can open. Maybe the attic framing is involved. At that point, no spot treatment can honestly claim to reach it all. The fumigant can. A fumigant is a gas, and gas fills every crack, joint, and tunnel in the house.
California recognizes two ways to treat a whole structure for drywood termites. Tenting is one. Heat treatment is the other. Heat trades the gas for high temperature and gets you home the same day, but it has limits of its own. Everything smaller than a whole-structure job (foam, borates, local drywood work) treats only the wood it touches. That works fine when the problem is small and contained. It is a poor bet when the termites have spread.
A tent is not the answer to every termite problem, though. It does nothing for subterranean termites, because they live in the soil outside the tent. And it is oversized for a drywood problem confined to one reachable board. The right first step is an inspection that names the species and maps how far it has spread. The termite treatment options page shows where tenting sits among the choices. If a company reaches for the tent before doing that homework, ask what the tent is for.
The standard three-day schedule
- 1
Day 1: the tent goes up
The house is sealed under tarps and the fumigant is released inside. The gas spreads into every wall, joint, and closed space.
- 2
Day 2: airing out
The tarps open and large fans push fresh air through the house. The gas clears out. The house stays off-limits.
- 3
Day 3: clearance test and re-entry
A licensed fumigator tests the air in every room with a meter. The house is released only after the readings show the gas is gone.
How to get the house ready
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Bag or remove food and medicine
Anything you eat, drink, or take goes out of the house or into special fumigation-rated bags.
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Plan two nights away
People, pets, and houseplants stay out from the day the tent goes up until the clearance test.
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Arrange the gas shutoff
The gas company turns service off before tenting and turns it back on after the house is cleared.
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Trim and water around the foundation
The tarps reach the ground. Cutting shrubs back and wetting the soil protects roots along the walls.
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Open interior doors and drawers
The gas needs to reach every space. That includes closets, cabinets, and the attic hatch.
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Hand over keys and gate codes
The crew needs access to every room and gate to seal, watch, and clear the house on schedule.
A full written checklist comes with scheduling.
Why most of the schedule is safety margin
The gas does its killing in hours. The rest of the three days is safety. On day two the tarps come open and high-volume fans push fresh air through the house. On day three a licensed fumigator walks the house with a meter and tests the air in every room. Keys come back only when every reading meets the re-entry standard. That clearance test is not a courtesy. It is the step the whole job is built around, and it is done with an instrument, not a sniff test.
The question on every household’s mind: do we wash everything afterward? No. The fumigant is a true gas, not a fog or a spray. It breaks apart and leaves the house during the airing-out day. There is no film on dishes, no residue in fabric, nothing to wipe down. That is also why the prep matters so much up front. Food and medicine go out or into rated bags because the gas reaches everything else in the house.
People, pets, and plants stay out from tent-up until clearance. The gas company shuts off service before the tent goes up. Warning signs go on the tarps, and extra locks go on the doors under them. It is a tightly controlled job from start to finish. That is exactly what you want from work that uses a poison gas.
Not sure your house needs a tent? Start with a free inspection.
Is there an alternative to tenting?
Sometimes. The honest answer depends on the map the inspection draws.
If the drywood galleries are easy to reach, no-tent local treatment can do the job. The infested boards get drilled and treated directly. You stay in the house, and the cost stays in line with the size of the problem. Maybe the infestation sits in one treatable zone instead. Or maybe you want no chemicals in the house at all. Then heat treatment is the other route. It can kill drywood termites through the full depth of the wood, and most heat jobs finish the same day.
The alternatives stop working when the termites have spread. Frass in three rooms. Galleries inside closed wall spaces. Signs in the attic and the garage at the same time. At that point, local treatment becomes a bet that the inspector found every last colony. The termites usually win that bet. A second round of spot work often ends up costing more than tenting the house once.
The tenting versus no-tent guide walks through this choice case by case. It also covers the gray zone where either answer can be defended. If a quote in front of you includes a tent, read it before you sign anything.
What drives the price of a fumigation
Fumigation is priced from the structure itself, not from a flat rate card. The biggest factor is volume — the cubic feet of space under the tarps. A two-story home with a steep roof costs more to tent than a one-story ranch with the same floor space. Attached garages, patio covers, and anything else under the same roofline sit inside the sealed space too. They count whether or not they are infested.
Complexity adds cost from there. A house that is hard to seal takes more tarp, more labor, and more time. Multiple rooflines slow the work. So do additions and tile roofs a crew has to walk with care. Tight access around the lot plays its part as well.
None of that can be read off a website. Any number quoted before someone measures and walks the house is a placeholder. The price that means something comes out of an inspection.
Frequently Asked Questions
How long will we be out of the house?
Plan on two nights away. The standard schedule runs three days. The tent and gas go in on day one. The house airs out on day two, and the clearance test comes on day three. You get back in only after a meter shows the gas is gone from every room.
Do we need to wash everything afterward?
No washing is needed. The fumigant is a gas, not a spray, and it clears out completely while the house airs out. It leaves nothing on dishes, counters, or clothes. Food and medicine get bagged or removed ahead of time because the gas reaches everything else.
Will fumigation keep termites from coming back?
Fumigation kills the termites in the house at the time of treatment. It leaves no lasting barrier behind, so a new colony can move in years later. That is true of tenting in general, which is why regular re-inspections afterward are a smart habit.
Does tenting treat subterranean termites too?
No. Subterranean termites live in the soil outside the tent, so the gas never reaches their colony. They are treated at the soil instead. If your house has both kinds, the soil work is a separate job.
Do the neighbors have to leave too?
Not if their homes stand apart from yours. The tarps seal only the treated structure, and the gas stays inside them until the airing-out day. Attached buildings are different. A shared wall or a connected unit becomes part of the sealed structure and must be empty too.
Is the house secure while it is tented?
California requires extra locking devices on the doors of a tented house, and the tent carries warning signs that keep most people away. Crews check on the structure during the job. Even so, take jewelry, cash, and important papers with you.
What happens to plants and landscaping?
Houseplants leave the house with you. Outside, shrubs growing against the walls get cut back so the tarps can reach the ground. Watering the soil along the foundation before tenting helps shield roots from the gas.