Best Way to Treat Drywood Termites in Houston
There is no single best method for all drywood termite infestations. The right treatment depends on where the colonies are, how many there are, and whether they are accessible. This guide covers every drywood treatment option and when each one is the right call.
- Spot injection for localized, accessible colonies — no displacement
- Tent fumigation for widespread or inaccessible infestations
- Heat treatment and orange oil covered — limitations included
- Inspection determines which method fits your specific situation
Why the Best Drywood Treatment Depends on the Inspection
Drywood termites are one of the few pest problems where method selection matters more than product selection. Unlike subterranean termites — which forage through soil and can be addressed with a perimeter barrier — drywood termites live entirely inside the wood they consume. Treatment must physically reach the colony. There is no product that works from a distance or through indirect contact.
This means the first and most important step is locating every active colony in the structure. A treatment plan built on incomplete inspection will leave active colonies untouched, and those colonies will continue producing frass and expanding into new wood. The method itself is secondary to getting the location mapping right.
Four methods are commonly discussed for drywood termite treatment: spot injection, tent fumigation, localized heat, and orange oil. Each has legitimate applications and real limitations that are worth understanding before accepting any recommendation.
How Each Drywood Treatment Method Works
Method selection is the critical decision — each works through a different mechanism with different reach.
- 1
Spot Injection
Small holes are drilled into confirmed infested wood and licensed termiticide is injected to reach the colony. Effective for accessible, identified colonies in frames, trim, and exposed structural members. No displacement required.
- 2
Tent Fumigation
The entire structure is sealed and treated with a penetrating fumigant gas. Reaches every wood void and framing member regardless of accessibility — eliminating all drywood colonies simultaneously in one treatment.
- 3
Localized Heat Treatment
Infested wood is raised to a lethal temperature using heat equipment. Effective for limited accessible areas but impractical for wall cavities, structural framing, or attic applications without significant equipment mobilization.
- 4
Orange Oil (d-Limonene)
Kills drywood termites on direct contact but does not penetrate deeply into wood. Not effective for established colonies inside structural members. Appropriate only for very superficial, newly introduced colonies in thin accessible wood.
Why Spot Treatment Is Right in More Houston Homes Than Fumigation Companies Suggest
Full-structure fumigation is the most comprehensive drywood treatment available, but it is genuinely necessary only when colonies are in inaccessible structural locations — inside wall framing, deep attic rafters, or areas where spot injection cannot physically reach. In a significant number of Houston drywood infestation cases, the infestation is localized to one or two accessible wood members, and fumigation is unnecessary.
The problem is that fumigation generates significantly more revenue than spot treatment. A company that defaults to recommending fumigation for any active drywood infestation without mapping the full extent through thorough inspection is not necessarily lying — but it is skipping the diagnostic step that would determine whether fumigation is actually required.
The right question for any Houston homeowner with suspected drywood termites is not 'do I need fumigation?' but 'has a thorough inspection been performed to map all active colonies?' If the inspection was cursory or designed to confirm a fumigation recommendation rather than to map the infestation accurately, a second opinion from a company that inspects thoroughly before recommending is warranted.
Drywood Termite Treatment Methods Compared
Honest comparison of the four primary treatment approaches — when each works and when it does not.
| Feature | Spot Injection | Tent Fumigation |
|---|---|---|
| Reaches inaccessible framing and wall cavities | ✗ | ✓ |
| Appropriate for localized, accessible infestations | ✓ | Overkill |
| Requires 24-48 hour displacement | ✗ | ✓ |
| Eliminates all colonies simultaneously | Accessible only | ✓ |
| Lower cost per treatment | ✓ | ✗ |
| Practical for attic and wall cavity infestations | ✗ | ✓ |
| Written warranty available | ✓ | ✓ |
Drywood Termite Treatment Method FAQs
What is the most effective drywood termite treatment?
Does orange oil kill drywood termites?
Is heat treatment effective for drywood termites?
How do I know which treatment my home needs?
Can I treat drywood termites myself?
How long after treatment will frass stop?
Drywood Treatment Method Summary
When each method is appropriate and what it cannot do.
Spot Wood Injection
Best for accessible, identified colonies in window frames, door trim, exposed rafters, or furniture. Not for wall cavities or inaccessible framing. No displacement required.
Tent Fumigation
Best for widespread infestations with multiple inaccessible colonies. Eliminates all colonies simultaneously. Requires 24-48 hour displacement and full preparation.
Localized Heat
Best for small accessible areas reachable by heat equipment. Not practical for wall cavities, structural framing, or attic members that cannot be directly exposed.
Orange Oil
Best only for very superficial, newly introduced colonies in thin accessible wood. Not effective for structural infestations or established colonies inside framing.
Annual Monitoring
Post-treatment protection against new introductions from infested furniture, lumber, or flying swarmers. Catches new colonies before they establish in inaccessible framing.
Inspection First
The most important step in every drywood scenario. Full structural inspection maps all active colonies before any method is selected. Treatment without complete mapping often fails.
What to Expect from a Resolve Drywood Assessment
Honest evaluation of your specific situation — not a default recommendation.
- Full structural inspection before any recommendation — frass mapping, attic check, and all void access
- Spot treatment quoted when accessible infestation confirms it is the appropriate method
- Fumigation recommended only when colonies are confirmed in inaccessible locations
- Written quote for the recommended method before any work begins
- Written warranty on all treatments — re-treatment at no charge if activity returns
- Same-day inspections available across Greater Houston
Related Drywood Termite Resources
Drywood Termite Control
Inspection-based drywood control for Houston homes.
Drywood Termite Fumigation
When full-structure fumigation is the right drywood treatment.
Drywood Spot Treatment
Direct injection for localized drywood infestations.
Drywood Termite Treatment
Full overview of all drywood treatment options.
Fumigation vs Spot Treatment
Detailed method comparison for drywood termites.
Get a Drywood Termite Assessment for Your Houston Home
The right treatment method is determined after mapping your specific infestation — not before. Same-day inspections available across Greater Houston.