Does every drywood termite infestation require tenting?

No. Localized chemical or nonchemical treatment may be appropriate when activity is limited and accessible. Whole-structure fumigation may be considered when activity is distributed or inaccessible, but the written recommendation should explain the evidence and alternatives.

Can you re-enter when the termite tent comes off?

Not based on the tent alone. EPA says a certified operator or supervised person must verify sulfuryl fluoride at 1 ppm or less in the breathing zones of each room with a clearance device before the structure is cleared.

Does termite fumigation prevent a future infestation?

Fumigation treats pests in the enclosed structure during that job; it does not create a lasting soil or wood barrier. Ask for a separate inspection, repair, monitoring, and prevention plan.

Termite Tenting and Fumigation: A Homeowner Decision Guide

If drywood termites are confirmed, the real decision is localized treatment versus whole-structure fumigation—not whether a particular number of visible spots automatically means the house must be tented. Species, the distribution of evidence, access to infested wood, building details, and the limits of each method should drive the recommendation.

California’s 2026 review of sulfuryl fluoride alternatives found that localized chemical and nonchemical methods are effective and widely used, while few viable whole-structure alternatives exist. It also found that comparative cost and effectiveness evidence remains incomplete. That supports a case-specific inspection—not a universal treatment threshold.

What termite tenting does

During structural fumigation, a trained crew encloses the building and applies a fumigant according to its EPA-approved label. The U.S. Environmental Protection Agency says sulfuryl fluoride is the only fumigant currently registered for residential use and is a restricted-use pesticide. It may be applied only by a certified applicator or someone under that applicator’s direct supervision.

The fumigant can reach drywood termites in concealed parts of an enclosed structure. However, it does not leave a persistent protective barrier after aeration. If an inspection identifies subterranean termites, soil contact, moisture, or another route outside the enclosed structure, the plan may also require a different control method. Review the broader termite treatment options guide before comparing proposals.

Localized treatment or whole-structure fumigation?

Use the inspection findings to ask better questions. Do not choose from a sales label such as “minor” or “severe” without the evidence behind it.

Inspection finding	Question to ask	Possible direction	What the written scope should show
Confirmed drywood termites in limited, accessible wood	Can every known gallery and nearby risk area be reached and evaluated?	Compare localized chemical and nonchemical methods	Target locations, access limits, treatment method, follow-up inspection, and what would trigger escalation
Drywood evidence in separated or inaccessible areas	Could undiscovered activity remain outside spot-treatment reach?	Compare whole-structure fumigation with any feasible localized plan	Evidence map, excluded areas, expected coverage, preparation, clearance, warranty, and post-treatment monitoring
Mud tubes, soil contact, or confirmed subterranean termites	Does the proposal address the soil-to-structure route?	Evaluate soil treatment, baiting, repairs, or a combined plan	Species, moisture and entry conditions, application sites, monitoring, and warranty
Termite species or activity is not confirmed	What specimen, damage, or instrument finding supports treatment?	Inspect and identify before selecting a method	Photos or samples, accessible and inaccessible areas, and the limits of the inspection

Start by documenting signs of termites without breaking open or repairing every clue before an inspection. If you are comparing inspection fees or real-estate reports, use the termite inspection scope checklist so each provider is pricing the same deliverables.

EPA safety, aeration, and clearance requirements

Sulfuryl fluoride is colorless and odorless. A homeowner cannot determine safe re-entry by smell, elapsed time, or whether the tarps have been removed.

EPA’s residential fumigation mitigation decision requires measures that include clearly posted no-entry warning signs, site-specific fumigation logs, additional training, device rules, and longer active and passive aeration. The current product label and the certified applicator’s instructions control the actual job.

EPA’s clearance-device guidance says a structure is cleared only after the certified operator or a person under that operator’s supervision verifies 1 part per million or less in the breathing zones of each room with a portable clearance device. If a reading exceeds 1 ppm, workers must leave the affected area until the measured level reaches 1 ppm or below.

Do not re-enter until the fumigator has completed clearance and notified you that the structure is cleared. Ask how the company will communicate that decision and who is authorized to make it.

What should be in the fumigation record?

EPA’s site-specific structural fumigation log requirements make the certified applicator in charge responsible for verifying the record. Required fields include:

The company, address, structure type, and target pest
Volume, temperature, exposure hours, seal condition, wind, fans, and dosing information
The names, license details, and signatures of responsible applicators
Warning-agent and sulfuryl fluoride application details
The date, time, and responsible personnel for aeration
The date, time, personnel, and device model for final clearance testing
Emergency information, including the nearest hospital

State requirements may supersede comparable federal log fields. Ask which record applies in your state and what copy or completion documentation the customer receives.

Label- and fumigator-led preparation checklist

There is no responsible universal packing list for every fumigant, label, structure, and jurisdiction. Use this checklist to organize the job-specific instructions from the licensed fumigator.

Before signing

Confirm the pest species and where evidence was found.
Ask why localized treatment is or is not suitable for this structure.
Verify the company and applicator through the appropriate state agency; the pest control licensing directory provides official starting points.
Obtain the treatment scope, EPA-approved product label, preparation instructions, exclusions, warranty, and re-entry procedure in writing.
Ask who handles utilities, keys, attached structures, alarms, gates, warning signs, and site security.

Follow the issued preparation instructions

Identify every person, pet, plant, food item, medicine, and other item addressed by the label or fumigator’s directions.
Use only the bags, seals, removal steps, and deadlines specified for the product and job.
Do not disconnect utilities or extinguish equipment unless the fumigator or utility provider directs it.
Provide access only as arranged, and keep everyone out of the posted treatment area.
Give the fumigator relevant accessibility, medical, alarm, attached-unit, or occupancy information before work begins.

Before returning

Wait for the authorized clearance decision; do not rely on appearance, smell, or a promised clock time.
Ask for the re-entry notice or job documentation and retain it with the contract.
Report any damaged seal, unexpected entry, alarm, or symptom concern immediately using the company’s emergency instructions.
Schedule any separate repair, moisture correction, monitoring, or prevention work identified in the inspection.

How to compare termite fumigation quotes

A national cost table cannot tell you what a particular structure should cost, and the 2026 California review says comparative cost evidence for alternatives remains incomplete. Compare itemized local proposals instead.

Ask each company to state:

The confirmed pest and evidence supporting the recommendation
The treated structure and any excluded spaces or attached areas
The product, label, preparation, aeration, and clearance process
Work performed by the fumigator versus the homeowner, utility, or another contractor
Repair, prevention, follow-up, retreatment, and warranty terms
Extra charges or conditions that could change the total

The lowest number is not comparable when it excludes preparation support, attached areas, follow-up, or a meaningful warranty. The highest number is not automatically the most complete either; the written scope is the basis for comparison.

Your next action

Photograph the evidence, save any intact specimen, and arrange a licensed termite inspection. Request a written map and scope that compares localized treatment with whole-structure fumigation for the actual species and accessible evidence. Verify credentials, compare equivalent proposals, and follow the selected label and fumigator’s preparation instructions exactly.

If fumigation is chosen, keep the site log or completion documents and do not re-enter until the authorized clearance process is complete. Then address repairs, moisture or entry conditions, and ongoing inspections separately because fumigation is a treatment event, not permanent protection.

Sources reviewed

Sources were accessed September 29, 2026.

Bottom line

Termite tenting is a consequential whole-structure treatment, not a default response to any drywood termite sign. Demand a species-level inspection, an evidence-based comparison of reachable localized treatment and whole-structure fumigation, and a written safety and clearance plan. When fumigation is appropriate, the licensed operator, current label, aeration process, and measured clearance—not a generic online timetable—control the job.