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A contemporary two-story home in a South Bay neighborhood — Foster City, California service area

Structure Fumigation

Fumigation in Foster City, CA

101 Exterminators performs full-structure fumigation in Foster City with Vikane (sulfuryl fluoride) when drywood termite galleries have spread past what a local treatment can reach. We are SPCB licensed, #9119, and have run structural work since 2005. The Foster City catch is attachment. Most housing here is townhome or condominium, so what gets tented is a building envelope, not one owner's unit.

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Local Context

The Hard Part of a Foster City Fumigation Is Deciding What the Tent Has to Cover

Fumigation is a whole-envelope treatment. Vikane fills every void in the sealed structure, which is precisely why it works when drywood galleries run through framing nobody can reach. On a detached house in Sand Harbour or Marina Point that is a clean job. But detached houses are the minority in Foster City. Most of the city is garden townhomes, low- and mid-rise condominiums, and apartments, and a tent there has to cover a fire-separated building section rather than four walls of ownership.

That makes a Foster City fumigation a scheduling problem before it is a pest problem. Every household inside the tented section has to be out for the full cycle, pets and plants included, with food and medication sealed in the Nylofume bags we supply. Boards in complexes through Winston Square, Harbor Side, and Edgewater Isle need notice, authorization, and often a vote. Adjacent units on the same roof plane need written notification. We build that sequence with the association before a date is booked.

The building stock does one thing in your favor: it seals well. Foster City went up in a single mid-1960s-to-1980s build-out, so it runs to regular rooflines with tile or composite shingle over stucco walls, without the turrets, wood shake, and stacked additions that make older Peninsula houses slow to tarp. And because most drywood pressure in this city sits in fascia, rafter tails, and lagoon-side deck and trim framing, a careful inspection often shows the infestation is still reachable. When it is, we say so and treat it locally instead.

How We Work in Foster City

We inspect and measure before anything else — cubic volume, roof type, the fire-separation lines that define the tent section, and every shared wall or common attic that changes scope. Then we walk the preparation list with each household in that section: Nylofume bagging, plants, pets, gas shut-off. We handle the required neighbor notification. After the exposure period the structure is aerated and cleared by third-party testing before re-entry, and Section 1 items get a Notice of Work Completed for escrow or the board.

Foster City Climate

Foster City sits on the Bay side of the Peninsula near the San Mateo Bridge approach, in the wind gap that funnels air in off the water. It is windier and far less fog-bound than the coastal cities over the ridge, with temperatures in a narrow band and annual rainfall of 17 to 19 inches. What matters for structures is not the air temperature but the humidity coming off the lagoon and the Bay. Wood in contact with damp ground dries slowly here, and the mild winters mean subterranean termite foraging never shuts down the way it does inland.

Housing Stock

Every Foster City neighborhood went up between roughly 1965 and the 1990s, and the high water table rules out basements, so most homes sit on a concrete slab rather than over a crawl space. That changes where termites show up. Instead of mud tubes on a pier, the routes are the slab edge, expansion joints, plumbing penetrations, and the gap behind stucco where it runs down to grade, which means a colony can be working inside a wall with nothing visible from the substructure. Lagoon frontage adds a second exposure: those parcels carry wooden bulkheads and dock framing at the water line, plus the fence and deck that tie into them. A large share of the city is townhomes and condominiums under HOA governance, where an inspection that stops at a unit line usually misses the building.

Why Local Expertise Matters

Foster City is not a standard Peninsula termite job. There is no crawl space to walk in most of the housing and no century of old framing to explain the damage. The building is young and the ground is the variable. We inspect slab construction the way slab construction has to be inspected: perimeter grade and slab edge, expansion joints and plumbing penetrations, wall voids where they meet the foundation, and any wood touching soil or lagoon water. Where there is a bulkhead or a dock we inspect that framing too, since it is the wettest wood on the parcel. We write WDO reports for real estate transactions and work with HOA boards and property managers when the building rather than the unit is the scope. SPCB Lic. #9119.

Warning Signs

Signs You Need Fumigation Service in Foster 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

How It Works

Our Fumigation Process in Foster City

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

Why 101 Exterminators

Fumigation You Can Count On in Foster 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.

Common Questions

Fumigation FAQs for Foster City

Can a single condo unit in Foster City be tented on its own?

No. Fumigation seals and treats an entire structure, so in an attached Foster City building the tent covers the fire-separated section — usually the full townhome row or condo building — and every household inside vacates for the cycle. That is why we bring the HOA in at the inspection stage. When activity turns out to be confined to accessible framing, local treatment is usually the better route for attached housing.

How does a Foster City HOA board authorize a fumigation?

Through the board, working from the WDO report. We issue a report that identifies Section 1 findings by building and by location, so directors can see whether the damage sits in common-area framing or inside a unit, then we coordinate with the management company on resident notice, scheduling, and access. Foster City has an unusually high share of association-governed housing, so this sequence is routine work here rather than an exception.

Does a Foster City tract house really need tenting for drywood termites?

Usually not, and Foster City's build era helps. A house from this city's original tracts has one generation of framing and comparatively simple roof geometry, so an inspector can often reach and confirm the full extent of the galleries. If activity is confined to fascia, rafter tails, or exposed deck and trim members, drill-and-inject, orange oil, or borate treatment handles it. Tenting is for infestation spread through framing that cannot be reached or confirmed.

Local Pest Pressure

Common Pests We Treat in Foster City

Every area has its own pest profile shaped by climate, housing, and geography. These are the pests we see and treat most often in Foster City — tap any one to learn how to identify it and what treatment involves.

Subterranean Termites

Foster City's reclaimed Bay land has persistently high water tables creating ideal soil moisture for subterranean termite foraging

Drywood Termites

Active in wood-frame structures across the city; less dominant than subterranean but present

Dampwood Termites

High-moisture conditions near lagoons can support dampwood termites in structures with wood-soil contact

Roof Rats

Bay-adjacent landscaping and lagoon corridors provide habitat and movement routes for roof rats

Argentine Ants

Consistent indoor pressure through spring and fall across Foster City's residential areas

Fumigation · Foster City

Free Pest Evaluation in Foster City

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

Schedule an Inspection(831) 500-1613
Trusted by Foster City families since 2005