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A peaceful Central California residential street lined with single-family homes — Los Altos, California service area

Structure Fumigation

Fumigation in Los Altos, CA

101 Exterminators performs full-structure fumigation in Los Altos with Vikane (sulfuryl fluoride), under California SPCB Lic. #9119 and working Santa Clara County since 2005. Tenting answers a scope problem, not a first finding. We recommend it when drywood galleries turn up in several separated parts of a sixty-year-old ranch, or in framing nobody can reach, and the report shows you why.

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Local Context

Tenting a Los Altos Lot Starts With the Trees, Not the Tarps

Fumigation becomes the right call in Los Altos for one reason: scope. In a house framed in the 1950s or 1960s, a drywood colony has had time to establish, swarm and re-establish in separate parts of the same structure. Partial treatments done a decade or two ago often addressed the galleries someone could reach and left the rest working quietly. When an inspection finds activity in the attic framing, the eaves and a bedroom window header on the same house, treating those three areas individually leaves whatever is between them untouched.

The Los Altos complication is above the roof, not in it. This city shades itself — mature oaks and street trees overhang rooflines on block after block, and a fumigation tarp needs clear air over the ridge and down all four sides to seal. On a canopied lot that means selective limb clearance before the tent goes up, coordinated with the homeowner and, on a heritage tree, with the city's tree rules. Narrow side yards on the older ranch lots and the deep landscaped setbacks in the Country Club District affect where crews can work and where the tarp can be weighted.

Post-and-beam houses tent too. An Eichler atrium is open to the sky, but it sits inside the tent rather than outside it, and the seal is made at the slab perimeter. Radiant heating in the slab, wide glass walls and a low-slope roof all change the prep conversation rather than the decision. What does not change is the sequence: confirm scope first, then decide whether a tarp is warranted at all.

How We Work in Los Altos

We inspect and measure the structure, then walk the lot for tarp clearance — overhanging limbs, side-yard width, fence gates, and where crews can stage. You get a written preparation checklist covering food, medications and plants, and we go over it in person before the date. Vikane is introduced to a calculated concentration, held, then aerated on protocol. A certified fumigation clearance company tests the structure before anyone re-enters, and we hand over the documentation at the end.

Los Altos Climate

Los Altos has a warm Silicon Valley climate with summer temperatures reaching 84–92°F and mild winters with 15–17 inches of rainfall. Its central valley position gives it consistent temperatures without the hillside extremes of Los Gatos or Saratoga. The mature tree canopy throughout the city creates a slightly cooler, more humid microenvironment at the street level that maintains Argentine ant activity and soil moisture year-round.

Housing Stock

Los Altos is defined by its 1950s–1960s ranch homes on well-maintained lots throughout virtually the entire city. These homes — now 60–70 years old — represent the heart of the drywood termite risk in Los Altos: original wood framing, original window trim and exterior siding, and crawl spaces that have been aging for decades. Custom and newer construction exists in smaller quantities near the hills adjacent to Los Altos Hills.

Why Local Expertise Matters

Los Altos' uniformly established 1950s–1960s housing stock means the entire city faces a similar generation of termite vulnerability simultaneously — we see this reflected in the consistent inspection findings throughout the city. Our 20 years of service in Los Altos gives us a thorough understanding of where drywood termite activity concentrates in this specific housing era.

Warning Signs

Signs You Need Fumigation Service in Los Altos

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 Los Altos

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

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 Los Altos

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 Los Altos

Will fumigating my Los Altos home damage the trees and landscaping around it?

The tarp itself is the risk to landscaping, not the fumigant, and it is manageable. Vikane is a gas that aerates out of the structure and does not persist in soil, but a tent has to lie against the ground and be weighted, so plantings tight to the foundation can get crushed or shaded for the duration. On Los Altos lots we walk the perimeter beforehand and identify what should be tied back, protected or trimmed, including the limbs that need clearance over the roof.

Can an Eichler or post-and-beam house in Los Altos be tented?

Yes. The tarp covers the whole structure including an open atrium, and the seal is made at the slab perimeter rather than at a foundation vent line. What changes is preparation: wide glass walls, exposed roof decking and radiant tubing in the slab all get reviewed before the date. That said, post-and-beam houses put a lot of structural wood in the open, so localized treatment is often reachable and we look hard at that option first.

My Los Altos house was spot-treated for termites years ago and they are back. Why?

Almost always because the original treatment matched the galleries that were accessible, not the full extent of the infestation. Drywood colonies in a house this age are frequently in more than one place, and untreated satellite galleries keep working and eventually swarm again inside the same structure. A current inspection that covers the attic, eaves, sub-area and interior trim is what separates a localized finding from a whole-structure one — and that distinction is what decides between drilling and tenting.

Local Pest Pressure

Common Pests We Treat in Los Altos

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

Drywood Termites

1950s–1960s ranch homes throughout Los Altos have original wood framing that is now 60–70 years old — prime territory for established drywood termite colonies

Subterranean Termites

Older crawl spaces with limited vapor barriers and creek-adjacent soil moisture see consistent subterranean termite foraging activity

Argentine Ants

Supercolonies extend throughout the fully-developed residential grid, supported by the consistently irrigated landscaping that maintains soil moisture year-round

Roof Rats

Dense mature urban tree canopy throughout Los Altos provides widespread arboreal rat habitat with direct roofline access to older homes via overhanging branches

Black Widows

Mature landscaping, wood storage, and garage interiors throughout Los Altos's established neighborhoods are common black widow locations

Fumigation · Los Altos

Free Pest Evaluation in Los Altos

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

Schedule an Inspection(831) 500-1613
Trusted by Los Altos families since 2005