Tenting vs Non-Tenting Termite Treatment: When You Need Fumigation

Verdict first: you need tenting (whole-structure fumigation) when drywood termites are spread through several areas of the house, or hidden in walls, attics and framing that an inspector cannot reach. You can usually skip the tent when the infestation is confined to one or two accessible areas, such as a window frame, a section of trim or a single piece of furniture, in which case localized heat, foam or spot treatments do the job with no move-out. And for subterranean termites, the kind that live in the soil and build mud tubes, tenting is the wrong tool entirely; those are treated with soil-applied liquid termiticides or bait systems. The rest of this guide explains how each approach works, what it reaches and what it misses, and how to decide which one your house needs.

Part of our Pest Control guide →

In this guide

1. Tenting vs Non-Tenting at a Glance
2. First, Identify Which Termite You Have
3. How Tenting Works
4. Non-Tenting Options for Drywood Termites
5. Decision Factor 1: How Widespread Is the Infestation?
6. Decision Factor 2: Can the Wood Be Reached?
7. Decision Factor 3: Disruption and Household Needs
8. Decision Factor 4: Lasting Protection
9. Decision Factor 5: Cost
10. Which Should You Choose?
11. Questions to Ask the Termite Company
12. Frequently Asked Questions

Tenting vs Non-Tenting at a Glance

Factor	Tenting (fumigation)	Non-tenting (heat, foam, spot, borate)
Termites treated	Drywood termites (and some wood-boring beetles)	Drywood in localized areas; liquids and baits for subterranean
Reach	Entire structure, including hidden wood	Only treated areas or zones
Depends on finding every colony	No	Yes
Time out of the house	Usually 2 to 3 nights	Usually none; heat may require a day out
Prep work	Heavy: bag food and medicine, remove plants and pets, cut back plants, open doors	Light to moderate, depending on method
Residual protection	None	Borate and some spot products leave residue; heat leaves none
Relative cost	Higher upfront; scales with house size	Lower for small jobs; can add up if repeated
Risk of missed colonies	Very low	Moderate to high if inspection is incomplete
Best for	Widespread or inaccessible drywood infestations	Small, confined, accessible infestations

First, Identify Which Termite You Have

The tenting question only applies to drywood termites. They live entirely inside dry wood, need no soil contact and push out small, hard, six-sided fecal pellets (frass) that pile up below kick-out holes. They are most common in the Southwest, Southern California, the Gulf Coast, Florida and Hawaii.

Subterranean termites, found in nearly every state, nest in the soil and travel into the house through pencil-width mud tubes on foundations. Fumigating the house does nothing to the colony in the ground. If you see mud tubes or damaged wood packed with soil, you need a soil or bait treatment; our comparison of liquid termite treatment vs bait covers that decision. For help telling the two apart, see subterranean vs drywood termites. Our pest control guide covers the full range of household pests.

How Tenting Works

For fumigation, a licensed crew covers the house in tarps sealed to the ground, or wraps it with tape and plastic on some structures, then releases a fumigant gas, most commonly sulfuryl fluoride, into the interior. The gas penetrates wood throughout the structure, including wall cavities, roof framing, built-ins and furniture, and kills termites in every life stage. After the exposure period, typically about a day depending on temperature and dosage, the crew removes the tarps and ventilates the house. A licensed fumigator then measures gas levels and clears the home for re-entry.

Because the gas reaches everywhere, tenting does not depend on finding each colony. That is its main advantage: drywood termites often have several separate colonies in one house, and some are inside framing no inspector can see without opening walls.

The trade-offs are disruption and lack of lasting protection. You must leave with pets and houseplants, bag or remove food, medicine and tobacco products in special fumigation bags, cut back plants touching the house, and often water the soil around the foundation so tarps seal properly. Once the gas leaves, nothing remains to stop a new swarm from moving in the next season. Our step-by-step guide on how to prepare for termite tenting covers the full checklist.

Non-Tenting Options for Drywood Termites

Heat treatment

Heat treatment is the closest non-chemical alternative to tenting. Technicians tent or seal off an area, sometimes the whole house, and blow in heated air until the core of the infested wood reaches a lethal temperature, generally around 120 degrees F or higher, then hold it there with temperature probes in the wood. Air temperatures inside often run well above that. The job usually takes several hours and you can typically return the same day.

Heat works well for attics, single rooms and smaller structures. It struggles where heat sinks such as concrete, tile, plumbing and thick beams keep parts of the wood cooler, and it can damage heat-sensitive items like electronics, candles, vinyl blinds, some plastics and fine finishes, which must be removed. Like fumigation, it leaves no residual protection.

Drill-and-inject spot treatments (foam and liquid)

For a known colony in accessible wood, a technician drills small holes into the termite galleries and injects a termiticide foam or liquid. Foam expands through the galleries and carries the active ingredient further than a liquid would. Products based on fipronil, imidacloprid and other actives are common, and some continue to work in the treated wood for a time. Spot treatments are fast and inexpensive for small problems, but they only treat the galleries the product reaches. If there is a second colony a few feet away in a wall cavity, it survives.

Borate wood treatments

Borate solutions are sprayed or brushed onto bare, unfinished wood, where they soak in and make the wood toxic to termites that eat it. They are excellent for exposed attic framing, crawlspace joists and new construction, and they provide long-lasting protection as long as the wood stays dry and unsealed. Borates do not penetrate paint or sealers well, so they are less useful on finished trim. See our guide to borate wood treatment for termites for details.

Orange oil, microwave and electrical methods

Orange oil (d-limonene) is injected into galleries like other spot treatments and kills termites on contact. Microwave and electrical devices are used by some companies to treat small sections of wall or trim. All of these are localized: they work only where the technician aims them, so they depend entirely on accurate detection.

Decision Factor 1: How Widespread Is the Infestation?

This is the deciding question. Signs in a single window frame or one piece of furniture point to a localized colony; frass piles in several rooms, swarmers emerging from multiple places, or activity in the attic and walls point to a structure-wide problem. Ask the inspector to map every sign they find and to say explicitly how confident they are that the infestation is contained. If the answer is uncertain, fumigation is the safer bet.

Decision Factor 2: Can the Wood Be Reached?

Local treatments need access. Exposed attic rafters, crawlspace joists, trim, door and window frames are reachable. Wood behind drywall, inside built-in cabinets, under hardwood floors or deep in roof framing often is not. When the colony is in hidden wood, tenting or a whole-structure heat treatment is usually needed to reach it.

Decision Factor 3: Disruption and Household Needs

Tenting means two to three nights away, boarding pets, bagging pantry items and arranging for the house to be secured. For households with medical equipment, elderly residents, many pets or large aquariums, that can be a real hardship. Localized methods let you stay home. That said, disruption should not override effectiveness: a spot treatment that misses colonies leads to repeat visits and more damage.

Decision Factor 4: Lasting Protection

Neither fumigation nor heat leaves anything behind to stop new termites. In high-pressure drywood regions, many homeowners pair a fumigation with borate on accessible framing, sealing of cracks and vents, and an annual inspection. Ask any company what follow-up or warranty comes with each option; renewal-based warranties are common for both approaches.

Decision Factor 5: Cost

Fumigation is priced mostly by the size and complexity of the structure and typically costs more upfront than a single spot treatment. Localized treatments are cheaper for a contained problem but can cost more over time if colonies are missed and you pay for repeated visits. Get at least two inspections and written quotes that state exactly what will be treated and what warranty applies. Our termite treatment cost guide breaks down typical ranges for each method.

Which Should You Choose?

• If you have drywood termites in multiple rooms, walls or the attic: choose tenting. It is the only method that reliably reaches every colony.
• If an inspector finds one contained, accessible colony: choose a spot treatment such as foam injection or orange oil, and schedule a follow-up inspection.
• If the infestation is in one area such as an attic or a single room and you cannot vacate for days: ask about compartment heat treatment.
• If you are building, remodeling or have exposed framing: apply borate to bare wood for long-term prevention.
• If you see mud tubes or soil in damaged wood: you have subterranean termites. Skip tenting and get a soil treatment or bait system.
• If you are selling a home with a drywood finding: buyers and lenders often expect a whole-structure treatment; ask your agent and inspector what the report will require.

Questions to Ask the Termite Company

• Which species did you find, and where exactly?
• How confident are you that every colony was located?
• What will this method reach, and what will it miss?
• What warranty comes with it, and does it cover re-treatment or only repairs?
• What prep is required, and how long must we stay out?
• Will you do a follow-up inspection, and when?

For tips on vetting providers, see our guide on how to choose a termite company.