Should termite treatment or fumigation happen before or after the wood repairs?
Short answer
Treatment first, repairs second, with one exception. Fumigation and local treatments kill the insects but do nothing for the damaged wood, and new wood installed before treatment can be infested before the tent comes down. So the usual order is inspect, treat, open up and repair, then have the pest company reinspect. The exception is a structural member that is unsafe today, such as a failing balcony joist or stair stringer. That gets shored or repaired immediately, and the treatment follows.
Why the order matters
Termite treatment and wood repair are two different jobs done by two different licensed trades, and they depend on each other. Treatment removes the colony. Repair restores the wood. Do them in the wrong order and you either rebuild over live insects or treat wood you are about to throw away.
With drywood termites, which live inside the wood, fumigation reaches every colony in the structure at once but leaves every gallery exactly as it was. With subterranean termites, which come up from the soil, a soil treatment or bait system has to be in place before new framing goes in, or the new wood is just fresh food on the same path.
The sequence that works
First, the inspection. A licensed pest company documents what is active and what is damaged. Second, the treatment: fumigation for widespread drywood activity, local treatment for an isolated colony, soil treatment for subterranean termites. Third, the carpentry. Damaged members are cut back to sound wood and replaced, and the conditions that let water in are corrected. Fourth, the pest company reinspects and issues its completion paperwork.
If you are planning a fumigation, this order has a practical benefit too. Once the tent is down and the house is cleared for re-entry, the carpenter can open walls and pull decking without worrying about spreading a live colony into new areas.
- Inspect: licensed pest company documents findings
- Treat: fumigation, local or soil treatment as recommended
- Repair: cut back, replace, fix the water source
- Reinspect: pest company confirms items are complete
The exception: anything unsafe today
Safety does not wait for a tent schedule. If a balcony joist has lost half its depth, a stair stringer is soft, or a railing post moves in your hand, that member gets shored or rebuilt right away. The treatment is still scheduled, and the pest company is told what was replaced so they can inspect the new work and any adjacent wood.
In practice this means a short visit to make the area safe, then the full repair after treatment. We would rather make two trips than leave a family using a balcony that should not hold them.
Coordinating two companies
Ask the pest company how they prefer to document repairs done by someone else. Most will reinspect and note that the items are no longer present, which is what a buyer or lender needs. Share the numbered report with your carpenter so the repairs map to the findings one for one.
Fumigation prep is the homeowner's job: bagging food and medications, arranging to be out for the period the company specifies, and handling plants and pets. Give yourself a few days of buffer between the fumigation clearance and the carpentry start, because tent dates can slip with weather or scheduling.
What Levi does and does not do
Levi does the wood. He probes and photographs before quoting, opens what the report flagged, replaces what has lost strength, and fixes the flashing, drainage or grading that caused it. He does not apply pesticides, and he does not sign off on termite activity. Those belong to a company licensed by the Structural Pest Control Board.
One thing worth asking the pest company before framing closes up: whether they recommend a borate treatment on the exposed new and existing wood. It is a common step on repairs in termite-prone areas, and it is far easier to do while the framing is open.
Related questions
Can the wood repairs and the fumigation happen the same week?
Yes, if the repairs are scheduled after the house is cleared for re-entry. Give it a buffer of a few days so a weather delay on the tent does not leave a carpenter waiting.
Will fumigation fix the damaged wood?
No. Fumigation kills drywood termites inside the structure but does not change the wood. Galleries, hollow sections and lost strength remain and have to be evaluated and repaired separately.
Do I need treatment if the termites look dead?
Let the pest inspector decide. Old pellets or empty galleries may mean a dead colony, or they may be the visible edge of a live one. The inspection, not the carpentry, answers that question.
Sources and further reading
- California Structural Pest Control Board (www.pestboard.ca.gov)