Termite Tenting (Fumigation) Guide: Process, Cost, and Preparation

If you’ve been told you need termite tenting — also called structural fumigation — you’re facing one of the most disruptive home treatments available. Vacating your home for 2–4 days, bagging your food, and making arrangements for pets is a significant inconvenience. But for certain termite infestations, it’s the most reliable solution available.

This guide explains exactly what termite tenting is, when it’s necessary, what to expect during the process, how to prepare, and what it costs.

What Is Termite Tenting (Structural Fumigation)?

Termite tenting is a pest control method in which a licensed fumigator places large tarps over a home, sealing the structure, and pumps in sulfuryl fluoride gas (marketed as Vikane) to lethal concentrations throughout the building.

The gas penetrates every space within the structure — inside walls, behind cabinets, in the attic, in every piece of wood — reaching termites that no other treatment can access.

After 24–72 hours of exposure, the tarps are removed, the structure is ventilated, and a clearance test confirms the gas has dissipated to safe levels before you return.

When Is Fumigation Necessary?

Fumigation is primarily used for:

Drywood Termite Infestations

Drywood termites live inside wood — no soil contact required. Unlike subterranean termites, you can’t treat them with soil injections. When multiple areas of a home are infested (common since drywood swarmers can enter through any small gap and establish multiple colonies), fumigation is the most reliable way to eliminate all colonies simultaneously.

Drywood termite fumigation is most common in:

Southern California (particularly coastal cities from San Diego to San Francisco)
Florida and the Gulf Coast
Hawaii
Tropical and subtropical areas worldwide

Severe Subterranean Infestations Throughout a Structure

If subterranean termite damage is extensive and colonies have spread deep into the structure (inside walls, multiple levels, inaccessible areas), fumigation may be combined with liquid soil treatment for complete control.

Situations Where Localized Treatments Have Failed

If spot treatments (orange oil injection, localized liquid applications) have been tried and the infestation persists or spreads, fumigation becomes the next step.

What Fumigation Does NOT Do

This is critical to understand:

Fumigation does NOT provide ongoing protection. Sulfuryl fluoride dissipates completely — it leaves no residue in the wood or soil. Once the gas clears, your home has no chemical barrier against new termite entry.

You will still need a prevention program after fumigation:

A baiting system to monitor for new activity
Liquid soil treatment if subterranean termites are also present
Annual inspections

The Fumigation Process: Step by Step

Before Treatment (Your Preparation)

Typically 1–2 weeks before:

Remove or double-bag (in special Nylofume bags, not regular bags) all food, beverages, and medications that will be in the home. Anything in airtight packaging (original sealed containers) is generally safe — consult your fumigator.
Make arrangements for 2–4 nights of housing for all family members and pets
Arrange for plants to be removed or covered (most fumigators require plants outside the tent)

Day before or morning of:

Water the soil around the foundation (helps prevent gas from escaping into the ground)
Leave all interior doors open, including closets, cabinets, and drawers
Unlock all doors for technician access
Remove or bag any remaining food items
Ensure all gas pilot lights are extinguished (your gas company may need to shut off service)

During Treatment

Tenting: Fumigators cover the entire structure with large tarps anchored to the ground. All gaps are sealed. The process can take 4–6 hours.
Warning agent injection: Chloropicrin (a tear-gas-like warning agent) is pumped in first to ensure no one remains inside accidentally.
Gas introduction: Sulfuryl fluoride is introduced to achieve the target concentration (oz. per 1,000 cubic feet) for the required duration. The concentration and time required depend on temperature — colder conditions require longer exposure.
Monitoring: Technicians monitor gas concentrations throughout treatment.
Aeration: After the required exposure time, the tarps are opened. Large fans ventilate the structure for several hours.
Clearance testing: A certified fumigator uses gas detection equipment to confirm sulfuryl fluoride levels are below 1 ppm — the EPA-established safe re-entry level.

After Treatment

You receive written clearance to re-enter
All surfaces, dishes, and linens may be used without special cleaning — the gas leaves no residue
Any remaining fruit or produce should be disposed of (unbagged fruit may absorb traces)
Schedule follow-up termite prevention treatment

How Much Does Termite Tenting Cost?

Fumigation is priced by the cubic foot of structure — calculated by multiplying the square footage of the home by the height.

Typical Cost Ranges (2026)

Home Size	Estimated Cost
1,000 sq ft	$1,200–$2,500
1,500 sq ft	$1,800–$3,500
2,000 sq ft	$2,500–$5,000
2,500 sq ft	$3,000–$6,500
3,000 sq ft	$4,000–$8,000+

Factors that affect cost:

Home size and height (cubic footage)
Regional pricing (California fumigation costs tend to be higher)
Severity of infestation (heavier infestations require higher gas concentrations and longer exposure)
Complexity of structure (attached structures, slabs, decks, and other features add complexity)
Company reputation and warranty terms

Additional costs to budget for:

Temporary housing: $200–$600 for 2–3 nights (hotels, Airbnb)
Food disposal and replacement: $50–$200
Post-fumigation prevention treatment (highly recommended)

Is Termite Fumigation Safe?

When performed by licensed professionals and when proper re-entry procedures are followed, termite fumigation is safe. Sulfuryl fluoride:

Dissipates completely — leaves no residue
Clearance testing verifies safe re-entry levels
Has been used for decades as the primary structural fumigant

Do not re-enter until you receive written clearance from the fumigator. The gas is invisible and odorless at sub-lethal levels — do not rely on smell to determine safety.

Alternatives to Fumigation

For drywood termites confined to a limited area, less invasive alternatives may be appropriate:

Orange oil (d-limonene): Injected directly into galleries. Effective for accessible, localized infestations — ineffective for hidden or widespread activity.

Heat treatment: Raises the temperature of specific rooms or the whole structure to kill termites. No chemical residue. Less penetrating than fumigation for full-structure drywood infestations.

Microwave or electrocution devices: Used by licensed operators on small, localized areas. Limited scope.

Most pest control professionals recommend fumigation when drywood termite activity is found in more than 2–3 locations throughout the structure. The cost of multiple spot treatments often exceeds the cost of fumigation while providing less certainty.

Choosing a Termite Fumigation Company

Verify the company is licensed as a structural pest control fumigator in your state
Ask for proof of insurance
Get 2–3 written estimates
Ask about warranty terms — what happens if termites are found after treatment?
Ask about post-fumigation prevention options

Get your free termite fumigation quote from licensed local professionals.

Bottom Line

Termite tenting is disruptive, but for established drywood termite infestations — especially in the coastal Southeast, California, and Hawaii — it’s often the only treatment that provides reliable, comprehensive results. The 2–4 day inconvenience is significant, but it’s far preferable to ongoing termite damage that compounds every year. Understand what you’re getting (treatment, not ongoing protection), prepare thoroughly, and use the experience as a starting point for a proper post-treatment prevention program.