Trusted Attic Cleaning & Rodent Proofing for Sunnyvale Homeowners
Attic cleaning and rodent proofing in Sunnyvale typically costs between $600 and $3,500 depending on attic size, contamination level, and how much exclusion work is needed. Most jobs take one to two days, and we can often get a crew to your Sunnyvale home within 48 hours. Rodents in your attic are not a minor nuisance – they chew wiring, shred insulation, and leave droppings that carry airborne pathogens. Since 2000, we’ve been cleaning and sealing attics throughout Sunnyvale, and we answer the phone live, 24/7. Call (669) 215-4805 and you’ll talk to a real person who knows attics, not a call center.
Walt Brenner started this company in 2000 with a simple idea: treat every house like it’s the one down the road from his own. That’s why we show our license number on every quote, why our techs arrive in uniform with background checks already done, and why every job is backed by our lifetime Done Right Promise. If we clean or seal something and it’s not done right, we come back and make it right. No runaround, no fine print.
What Our Attic Cleaning & Rodent Proofing Service Includes
Every Sunnyvale attic job we do falls under four main services. If you’re not sure which one you need, start with a call to (669) 215-4805. We’ll ask a few questions about what you’re seeing or hearing, and tell you straight what we’d recommend.
Attic Cleanout
An attic cleanout means removing everything that shouldn’t be up there: old insulation, rodent nests, droppings, food caches, and contaminated debris. You need this when you’ve had rodents for more than a few weeks, when you’ve noticed smells or stains leaking through the ceiling, or when old insulation has been trampled flat and no longer holds heat. We vacuum everything out with HEPA-rated equipment, bag it, and haul it away. Then we inspect the bare attic deck for damage before anything new goes back in.
Attic Sanitizing & Decontamination
Rodent urine and droppings carry hantavirus, salmonella, and other pathogens that become airborne when disturbed. Sanitizing is more than a surface wipe-down. We apply a disinfectant fog or spray treatment across the full attic space after cleanout, including the decking, joists, and any pipe chases. This is the step that actually neutralizes odor and makes the space safe to work in and live under. After treatment, many Attic Cleaning & Rodent Proofing in Sunnyvale customers tell us the musty smell that had been creeping into the living space is gone within a day.
Rodent Proofing & Exclusion
Cleaning a rodent-infested attic without sealing entry points is like mopping the floor while the roof leaks. We inspect your entire attic perimeter, the roofline, gable vents, pipe penetrations, and any gaps around chimneys or skylights. Common entry points in Sunnyvale attics are gaps at the eave line where the roof meets the fascia, uncapped roof vents, and the quarter-inch crack around air conditioning line sets. We seal these with galvanized steel mesh, metal flashing, or high-density foam composite where appropriate, because rodents can chew through spray foam alone. Exclusion is permanent when done right, and that’s exactly why it’s part of our lifetime workmanship guarantee.
Attic Restoration
After a heavy infestation, your attic often needs more than cleaning. Restoration means we replace any insulation that was soiled or shredded with fresh material from Owens Corning, Johns Manville, or Knauf. We also assess vapor barrier integrity, check for signs of moisture damage, and make sure the attic ventilation is still working as it should. In many Sunnyvale homes we work on, the ridge vents and soffit intakes were either blocked by old insulation or never adequate to begin with. We fix that as part of the restoration, so your attic is not just clean – it’s functioning properly.
Call (669) 215-4805 to schedule a free inspection, and we’ll tell you which of these services you actually need. No trip charge inside Santa Clara County, and we honor a permanent 10% discount for seniors and veterans.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Brands We Service for Attic Cleaning & Rodent Proofing
Roof rats and mice don’t care what brand of insulation you have, but we do. The way insulation is laid, the depth, and the material all affect how much of it has to be removed and what’s worth saving. We’ve worked extensively with Owens Corning fiberglass batts and blown-in products, and we know exactly what contamination looks like on their material versus a rodent just running along the top. If we can salvage your Owens Corning insulation by spot-cleaning and sanitizing, we will. If it’s soiled through, we’ll say so plainly and recommend a full cleanout and replacement.
We also have deep experience with Johns Manville blown-in fiberglass and Knauf batt insulation. Both are quality products that hold up well, but rodent urine and feces will compromise any material’s R-value and air quality. When we restore a Sunnyvale attic, we typically recommend one of these three brands based on your existing setup, your budget, and the specific way your attic is ventilated. Whether you have one of these brands or something else entirely, we can help. Call us and we’ll tell you what you’re working with.
Signs You Need Attic Cleaning & Rodent Proofing Right Now
- Scratching or scurrying sounds in the ceiling, especially at dawn and dusk. Roof rats are nocturnal and most active just before sunrise and after sunset. If you hear movement in the attic, rodents have already established a path in. Waiting won’t make them leave – they’ll breed.
- Droppings in the attic, garage, or along exterior walls. Rat droppings are about half an inch long with blunt ends; mouse droppings are smaller with pointed ends. Finding either means they’re active now, not last year. Every week they stay inside, the cleanup gets more expensive.
- Gnaw marks on wiring, wood, or insulation. Rodents chew constantly to wear down their teeth. Gnawed electrical wiring in a Bay Area attic is a fire hazard, and it’s one of the most common reasons we get emergency calls in Sunnyvale. This is not a fix-it-yourself project – shut that circuit off and call a professional.
- A musty, urine-like smell that won’t go away. Rodent urine soaks into insulation and wood, and the smell often persists long after the animals are gone. Sanitizing is the only way to truly remove the odor, and it’s part of every full cleanout we do.
- Dark, greasy rub marks along the attic walls or beams. Rodents leave oil trails from their fur as they travel the same routes. If you see streaks along the perimeter of the attic or at entry points, that’s a recent and active trail. It also tells us exactly where to focus the exclusion work.
If you’re noticing any of these in your Sunnyvale home, don’t wait. The longer it goes, the more insulation gets replaced. Call (669) 215-4805 and we’ll get someone out to look.
Our Attic Cleaning & Rodent Proofing Process - Step by Step
We don’t do mystery pricing or vague promises. Here’s exactly how a typical Sunnyvale attic job goes, from first call to final walkthrough.
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Inspection and estimate. One of our uniformed, background-checked technicians walks your attic with a flashlight and a moisture meter. We check for droppings, damage to insulation, possible entry points, and signs of wiring issues. You get a written itemized estimate before any work starts, with every cost broken out. Estimates are free, and there’s no trip charge inside Santa Clara County.
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Containment and cleanout. We set up protective floor coverings and negative-pressure HEPA equipment where needed to keep contaminated dust from drifting into your living space. Then we remove all soiled insulation, nesting material, and debris, bag it in sealed containers, and haul it out through the attic access or roofline.
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Sanitizing and deodorizing. The entire attic space – decking, joists, rafter tails, and any ductwork – gets treated with a professional-grade disinfectant. We pay special attention to the areas where nests were and the travel paths we identified during inspection. This step kills bacteria and neutralizes odor at the source.
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Rodent proofing and exclusion. Working from inside the attic and along the exterior roofline, we seal every gap larger than a quarter inch. In Sunnyvale, the usual culprits are open eave gaps where the roof sheathing meets the framing, mesh-free gable vents, and pipe collars that have pulled loose. We use steel mesh and metal flashing because rodents can’t chew through metal. Spray foam alone is not a permanent barrier.
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New insulation and final inspection. We install fresh insulation to your attic’s recommended R-value for this climate zone, which in Sunnyvale typically means R-38 to R-49. We then do a full walkthrough with you, show you every entry point we sealed, and explain the work. If anything isn’t right, our Done Right Promise means we come back and fix it. For life.
How Much Does Attic Cleaning & Rodent Proofing Cost in Sunnyvale?
Let’s talk real numbers. A basic Attic Cleaning & Rodent Proofing pricing for a small to mid-size Sunnyvale home (1,200 to 1,800 square feet) generally runs from $1,200 to $2,200 for cleanout and sanitizing. If you need full insulation removal and replacement with new Owens Corning or Johns Manville material, that typically adds $1,500 to $3,000 depending on square footage and attic access. Full exclusion work – sealing every gap, installing vent screens, and closing off eave openings – runs $500 to $1,800 depending on how many entry points we find and how accessible they are. A complete job with cleanout, sanitizing, exclusion, and new insulation usually lands between $3,000 and $5,500 for the average Sunnyvale ranch or two-story.
What affects the price? Attic size is the biggest factor. So is contamination level – a light mouse problem costs far less to clean than a roof rat colony that’s been nesting for two years. Accessibility matters too. Attics with low ceilings, tight rafter angles, or difficult access hatches take more labor. And if the rodents chewed wiring, you may need an electrician to inspect it, which is separate from our scope.
How do you avoid overpaying? Get an itemized quote. Ours breaks out cleanout, sanitizing, exclusion, and insulation separately. If a company just says “attic restoration package, $5,000” without telling you what that includes, ask questions. Also, any written estimate you get from another contractor, bring it to us. We’ll give you a free second opinion – and if your job is a repair over $200, we’ll knock $40 off. Seniors and veterans always get 10% off, no expiration. Call (669) 215-4805 for an exact quote; estimates are free.
Attic Cleaning & Rodent Proofing Near Sunnyvale - Our Service Area
We’re based right in Sunnyvale and we serve the whole South Bay and Peninsula. Most Sunnyvale calls get same-day or next-day assessment. We also work regularly in Mountain View, Newark, Los Altos, Cupertino, Palo Alto, Menlo Park, Campbell, Milpitas, Saratoga, Los Altos Hills, and East Palo Alto. If you’re within Santa Clara County, there’s no trip charge for us to come out and look. Call (669) 215-4805 and tell us where you are – we’ll tell you when we can be there.
Serving Sunnyvale, CA - Our Local Coverage Area
We’re based in the Sunnyvale area and know this community well. We also offer Attic Cleaning & Rodent Proofing - Mountain View and nearby communities. Use the map below to see our full service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Attic Cleaning & Rodent Proofing in Sunnyvale
Attic cleaning and rodent proofing is the process of removing contaminated insulation and debris from your attic, disinfecting the space, sealing every potential rodent entry point, and replacing insulation as needed. In Cupertino and throughout the area, the most common culprits are roof rats and house mice. It’s not just about removing the rodents; it’s about making the attic structurally and biologically clean again.
Most single-family homes in Sunnyvale take one to two full days from cleanout to final insulation. Small attics with light contamination can sometimes be done in a single day. Larger homes, heavy infestations, or extensive exclusion work may take three days. We’ll give you a specific timeline during your free estimate.
You’re looking at $600 to $1,200 for a light cleanout and basic exclusion on a small attic, and $3,000 to $5,500 for a full-scale job with insulation replacement on an average Sunnyvale home. The exact price depends on the size of your attic, the contamination level, and the number of entry points. Call (669) 215-4805 and we’ll give you an exact number after a free inspection.
Yes. We work with Owens Corning, Johns Manville, and Knauf insulation regularly, and we know how to assess contamination on each material type. If your existing insulation can be saved through spot-cleaning and sanitizing, we’ll say so. If it needs replacement, we’ll install a brand chosen for your home’s specific attic conditions.
Yes. If you’ve had a rodent die in the attic, discovered active gnawing on wiring, or have water coming through from a damaged area, we treat that as urgent. Our phones are answered 24/7 by a live person, not a voicemail tree. We’ll tell you honestly how fast we can get there.
Every job we do is covered by our lifetime Done Right Promise. If something we cleaned, sealed, or installed isn’t done right, we’ll come back and make it right at no charge. That’s not a marketing line – it’s the same promise Walt Brenner has operated under since 2000. If our exclusion work fails and rodents get back in, we’re coming back.
Clear any personal items from the attic access area and make sure we can get a ladder to the hatch. If you have a home security system with attic sensors, disable the attic zone for the day. That’s really it. We handle everything else, including floor protection and cleanup, and we’ll walk you through what we found when the job is done.
Schedule Your Attic Cleaning & Rodent Proofing Service in Sunnyvale Today
If you’ve heard scratching in the ceiling or walked into a bedroom that smells like a pet store, don’t put it off. Rodent damage gets more expensive every week. Call (669) 215-4805 now and talk to a real person who can answer your questions and schedule a free estimate. No pressure, no obligation, no trip charge in Santa Clara County. And remember – if we can’t do it right, we won’t do it. That’s the Done Right Promise.
Written by Walt Brenner, Owner at Walt’s Insulation, serving Sunnyvale since 2000.