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A modern craftsman home in a leafy Silicon Valley suburb — Redwood City, California service area

Fumigation in Redwood City, CA

101 Exterminators performs whole-structure fumigation in Redwood City using Vikane (sulfuryl fluoride), under SPCB Lic. #9119 and in business since 2005. Fumigation is a scope decision, not a default. When drywood termites turn up in framing in several rooms of a 1920s Craftsman off Jefferson Avenue, gas reaches galleries that drilling and injection cannot. We inspect and document the extent before recommending it.

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Frass in Four Rooms of a 1920s Craftsman Is a Scope Problem, and Scope Picks the Method

Fumigation answers one question: how far has it spread. Redwood City's pre-war housing makes that question harder than it looks. The Victorians and Craftsman bungalows around Downtown, Mount Carmel and Stambaugh-Heller were built when this city was still shipping lumber out of its own embarcadero, and they carry balloon framing, closed soffits and plaster over lath. Western drywood termites (Incisitermes minor) can occupy a top plate, a ceiling joist and a window header in three different rooms with almost nothing visible from the floor.

The warm side of the ridge keeps feeding it. With the Santa Cruz Mountains holding most of the fog off this city, Redwood City runs warmer than the coastal Peninsula, and warm evenings are what drywood swarmers fly on. A house that has stood here since the 1920s has been available to a century of flights. Multiple independent colonies in one structure is the normal finding here, not the unusual one.

That is where a tent earns its place. Gas moves into every void, joint and cavity at once, including framing behind plaster that nobody can open without demolition. When the evidence is confined to accessible members, we say so and treat locally instead. The honest part of this service is the recommendation, and on a Redwood City house it turns on what the attic, the sub-area and the interior framing show together.

How We Work in Redwood City

Before we quote a fumigation in Redwood City we measure the structure for gas calculation and walk the preparation list with you: food, medication and pet food into Nylofume bags, plants and pets out, and a vacate period spanning several days and nights that we put in writing once the structure is measured. Downtown and the older neighborhoods have tight lot lines, so fence clearance, overhanging trees and neighbor notification get looked at early. Re-entry happens only after clearance testing confirms the gas is below threshold.

Redwood City Climate

The "Climate Best By Government Test" arch downtown comes from a slogan contest a local resident won in 1925, and the survey behind it was real: a pre-World War I climatological comparison placed Redwood City alongside the Canary Islands and the North African coast. What matters for pest work is what that warmth does. The hills to the west block most of the marine layer that keeps Daly City and Pacifica cool, so summer afternoons here run hot, and the record high of 110°F was set as recently as September 6, 2022. Rainfall averages about 20.5 inches a year, nearly all of it between November and March. Drywood swarmers fly August through October, at the hottest end of the local calendar; subterranean swarms arrive with the rains, February through May.

Housing Stock

North and west of downtown, the Mount Carmel, Edgewood and Centennial blocks have pre-1940 houses on raised foundations, with the original redwood and fir framing still in the walls and attics and crawl spaces a technician can work in. Post-war tract housing spreads south and east from there. Farm Hills and Woodside Plaza went up mostly between the 1950s and the 1970s on the hillside side of town. Redwood Shores is the outlier: a 1960s planned community built on bay mud and former salt-evaporation ponds, with lagoons threaded through it and groundwater close to the slab. Termite species, foundation type and inspection access all change between those four.

Why Local Expertise Matters

Two Redwood City addresses can need opposite work. A 1926 house near Mount Carmel usually means drywood termites in old framing, reached through a crawl space and an attic. A Redwood Shores townhouse on filled ground usually means subterranean activity at the slab edge, plus moisture conditions that land as Section 2 findings on the report. Knowing which conversation you are in before the inspection starts is most of the job. We have been licensed and insured in California since 2005 and hold SPCB License #9119.

Signs You Need Fumigation Service in Redwood City

We manage the entire fumigation process: pre-fumigation inspection and documentation, structure tenting with certified fumigation tarps, introduction of Vikane fumigant to specified concentration, aeration protocol, post-fumigation clearance testing, and coordination with a certified fumigation clearance company before you return. We also provide bagging requirements and preparation guidance for food, medications, and plants.

Multiple locations of frass (termite pellets) throughout the structure — not just one area

Evidence of drywood termites in structural framing, not just surface wood

Previous localized treatments that have not resolved the infestation

Inspector-identified infestation in inaccessible areas (wall cavities, sealed areas)

WDO report showing extensive Section 1 conditions throughout the structure

Visible winged termites (swarmers) emerging from multiple locations

Our Fumigation Process in Redwood City

Every job follows the same methodical approach — no shortcuts, no guesswork. Here is what to expect when you work with us in Redwood City.

01

Pre-Fumigation Inspection

We document all entry points, confirm the infestation scope, measure the structure for gas calculation, and review the preparation checklist with you at least 3 days before the fumigation date.

02

Structure Tenting

Our crew tents the entire structure with specialized fumigation tarps, sealed at the foundation to prevent gas escape. Neighbors are notified as required, and warning signs are posted.

03

Gas Introduction & Monitoring

Vikane is introduced to calculated concentration and held for the required exposure time. Readings are monitored throughout the process to confirm effective dosage.

04

Aeration & Clearance

The structure is thoroughly aerated until Vikane levels are below the safe entry threshold. A certified third-party inspector confirms clearance levels before we authorize re-entry.

Fumigation You Can Count On in Redwood City

Complete Structure Coverage

Gas fumigant penetrates every void, cavity, and piece of wood in the structure — including areas impossible to reach with liquid or foam treatments.

Vikane — Industry Gold Standard

Vikane (sulfuryl fluoride) is the most widely used and thoroughly studied structural fumigant. It leaves no residual after aeration — the structure is safe to re-enter after clearance.

Third-Party Clearance Testing

Re-entry is only authorized after independent clearance testing confirms gas levels are below threshold. No guesswork on when your home is safe.

Real Estate Compliant

Fumigation clears all Section 1 termite conditions for real estate transactions. We issue the required Completion Notice accepted by lenders and escrow companies.

Fumigation FAQs for Redwood City

Can a house on a small downtown Redwood City lot be tented?

Usually yes, though a tight lot changes the preparation. Tenting needs working clearance around the structure and a way to seal the tarp at grade, so narrow side yards, fences, overhanging trees and shared driveways get checked before a date is set. Neighbors are notified and warning signs posted as required. On very constrained downtown lots we look hard at whether local treatment can do the job instead.

Does fumigation clear a Section 1 termite finding for a Redwood City escrow?

Yes — a completed fumigation clears Section 1 drywood termite findings, and we issue the Notice of Work Completed that lenders and escrow companies ask for. Section 2 items such as wood-to-soil contact or a moisture condition in the sub-area are separate and are not resolved by gas. Buyers and agents on Peninsula transactions usually want both addressed before closing, so we list them plainly instead of burying them.

Will tenting a Redwood City house kill the plants in the yard?

Landscaping outside the tarp is generally unaffected, but plants and cut flowers inside the structure have to come out, and we water and sometimes trim vegetation touching the walls before the tarp goes down. Ground cover sitting under the tarp edge can be crushed or stressed. We walk the perimeter with you beforehand so nothing you care about is a surprise afterward.

Free Pest Evaluation in Redwood City

CA licensed and insured. Written estimate before any work begins. Urgent situations in Redwood City are prioritized.

Trusted by Redwood City families since 2005