Trusted Attic Cleaning & Rodent Proofing for San Marcos Homeowners
Attic cleaning and rodent proofing in San Marcos typically costs between $1,200 and $4,500 - see Attic Cleaning & Rodent Proofing pricing for what drives the range - depending on contamination level, attic square footage, and whether structural repairs are needed. Most jobs take one to three days, and we can often start within 48 hours of your call. Call (737) 337-8049 for a written estimate with no obligation.
We’ve cleaned and sealed attics in San Marcos since 2016, from the older ranch homes near Texas State University to the newer builds in Willow Creek and Blanco Vista, and we also offer Attic Cleaning & Rodent Proofing - Kyle for nearby homeowners. The Hill Country climate here creates a specific problem: hot, humid summers drive rodents and pests into cooler attic spaces, while mild winters let them stay active year-round. We’ve documented the pattern in hundreds of San Marcos homes. Rodent droppings in insulation don’t just smell; they degrade air quality throughout the house as your HVAC system pulls air from the attic envelope. Our crews are background-checked, uniformed, and arrive with a written scope and price before any work begins. Under Haven Standard, you also get a Documented Photo Record of every step, and a 365-Day Done Right Promise on all completed work.
What Our Attic Cleaning & Rodent Proofing Service Includes
Attic Cleanout
Attic cleanout is the removal of contaminated insulation, debris, rodent droppings, nesting material, and any damaged storage items from your attic space. You’ll need this when you can smell urine or ammonia when the HVAC runs, or when your insulation has compressed to less than its original R-value due to pest activity. In San Marcos, we regularly find that homes built before 1990 in neighborhoods like Dunbar and Sagewood still have original fiberglass batt insulation that’s become a rodent habitat. Our crew removes everything down to the attic deck, bags it in sealed containers, and hauls it away. You receive before-and-after photos showing the full attic deck exposed.
Attic Sanitizing & Decontamination
Attic sanitizing applies EPA-registered disinfectants and enzymatic cleaners to eliminate bacteria, viruses, and odor-causing organic matter left by rodents or wildlife. You need this after any confirmed rodent presence, not just visible droppings, because hantavirus and leptospirosis can remain active in dried waste. In San Marcos, the combination of limestone geology and seasonal humidity means attics can retain moisture that keeps pathogens viable longer than in drier Central Texas counties. We fog the entire attic envelope with a hospital-grade sanitizer, then apply an enzymatic treatment that breaks down urine crystals in wood and drywall. The process takes four to six hours to treat and dry, and we test surface contamination levels before clearing the space for reinsulation.
Rodent Proofing & Exclusion
Rodent proofing, also called exclusion, is the sealing of all entry points larger than one-quarter inch - the width a mouse needs - using steel mesh, copper wool, and concrete patching where rodents have chewed through. You need this after cleanout and sanitizing, or you’ll be repeating the entire process in six to eighteen months. San Marcos homes have specific vulnerabilities: pier-and-beam foundations common in the historic district create multiple ground-level access points, and roof intersections on tile roofs in newer developments like Trace let rats bridge from tree branches. We perform a full exterior inspection, map every entry point on your photo record, and seal them with materials rodents cannot chew through. This includes chimney caps, vent screening, and garage door seal replacement where needed.
Attic Restoration
Attic restoration rebuilds your thermal and air barrier after contamination removal, including new insulation, air sealing of top plates and penetrations, and sometimes damaged decking or duct repair. You need this when cleanout leaves your attic at R-11 or lower, or when your blower-door test shows excessive leakage through the ceiling plane. In San Marcos, code minimum for attic insulation is R-30, but we typically restore to R-38 or R-49 depending on your HVAC system and budget. We air seal first - top plates, can lights, wire penetrations, and chimney chases - then install your chosen insulation type. On every restoration job, we provide before-and-after blower-door numbers so you can verify the air-sealing result in a single figure.
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.
Signs You Need Attic Cleaning & Rodent Proofing Right Now
- Scratching sounds in walls or ceiling during quiet hours. Rodents are nocturnal. If you hear movement between 10 PM and 4 AM, you likely have active nesting. In San Marcos, roof rats are the most common species, and they reproduce year-round in our climate. Delaying action typically means a colony of six becomes thirty within three months.
- Visible droppings or urine stains in attic access areas. Rodent droppings are dark, pellet-shaped, and accumulate near food sources and nesting sites. Even a few visible pellets near your attic hatch suggest a much larger hidden population above. The waste also attracts insects, creating a secondary pest problem that compounds cleanup costs.
- Insulation that appears tunneled, compressed, or discolored. Healthy insulation lies flat and maintains its loft. If your fiberglass looks like someone dragged a rake through it, or if you see dark smearing along joists, rodents have been traveling and nesting there. Compressed insulation loses R-value, which means your HVAC runs longer and your summer electric bills in San Marcos climb higher than they should.
- Unexplained allergic symptoms or respiratory issues. Rodent dander, droppings, and decomposing organic matter become airborne and enter living spaces through ceiling penetrations and HVAC returns. We’ve had San Marcos customers resolve chronic sinus issues only after full attic decontamination. If your doctor can’t identify an allergen trigger, your attic is worth inspecting.
- Chewed wires, damaged ductwork, or water stains from compromised flashing. Rodents gnaw continuously to keep their incisors short. Exposed wiring creates fire risk; damaged ducts dump conditioned air into your attic. In one San Marcos home near Wonder World Drive, we found $2,400 in electrical repairs needed solely from rodent damage that the homeowner had attributed to “old house quirks.”
Before
AfterOur Attic Cleaning & Rodent Proofing Process - Step by Step
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On-site inspection and written estimate. We arrive at your San Marcos home with a checklist, a camera, and a blower door if restoration is likely. The technician inspects the attic interior, the roof exterior, the foundation perimeter, and all utility penetrations. Within 24 hours, you receive a written price, a detailed scope, and a photo log of what we found. No work starts without your signature on both documents. Haven Standard Clause 1: flat price, written scope, written warranty before anyone lifts a tool.
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Containment and removal. Our crew seals your HVAC returns and living space access points with plastic sheeting and negative-air machines. We remove all contaminated insulation, debris, and organic material in sealed bags, hauling it to approved waste facilities. The attic deck is fully exposed and vacuumed with HEPA filtration. You receive a photo record of the empty attic deck before any treatment begins.
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Sanitizing and decontamination. We fog the entire attic with an EPA-registered disinfectant effective against hantavirus, salmonella, and leptospirosis. An enzymatic cleaner follows, breaking down urine crystals that standard disinfectants miss. The attic must dry completely before sealing or insulation - typically four hours in San Marcos summer conditions, longer in winter humidity.
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Exclusion and air sealing. Using the entry-point map from inspection, we seal every gap with rodent-proof materials: 19-gauge steel mesh for weep holes and vents, copper wool for irregular gaps, concrete patch for chewed structural elements. Inside, we air seal top plates, can lights, wire penetrations, and chimney chases with caulk and foam. This is the step most competitors skip or charge extra for. We don’t. Sealed first, then insulated - in that order.
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Restoration and documentation. We install your chosen insulation to the agreed R-value, using materials from Johns Manville, Knauf, Rockwool, or CertainTeed depending on your home’s needs and your preference. On every restoration job, we run a blower-door test - a pressurization reading that shows, in one number, how much air your building envelope was losing before and after. You receive the written results, the final photo record, and your 365-Day Done Right Promise documentation before we leave.
How Much Does Attic Cleaning & Rodent Proofing Cost in San Marcos?
A typical attic cleanout and sanitizing job in a 1,200-square-foot San Marcos home runs $1,200-$2,400. Full restoration including rodent proofing, air sealing, and new insulation typically ranges from $3,200-$6,800 for the same footprint. Larger homes in Blanco Vista or Willow Creek, or those with severe contamination requiring deck replacement, can reach $8,500-$12,000.
Several factors move the price. Contamination level determines labor hours and disposal fees. Attic accessibility matters: truss attics with limited headroom take longer than open joist bays. The extent of rodent damage to wiring, ducts, or decking adds material and subcontractor costs. Your chosen insulation type affects the back end of the job - blown-in fiberglass from Johns Manville costs less per square foot than Rockwool or spray foam, with different performance characteristics.
To avoid overpaying, get any competing estimate in writing and bring it to us for a Free Second Opinion. We’ll read it with you line by line and flag scope gaps we’ve seen from other San Marcos contractors - common ones include skipping air sealing, quoting insulation over unsealed penetrations, or omitting exclusion work that guarantees repeat infestation. Our estimate includes everything: labor, materials, disposal, sanitizing, and your Documented Photo Record. No line-item surprises after work begins.
Call (737) 337-8049 for a written estimate at your San Marcos home. Estimates are free, and we can usually inspect within 48 hours.
Attic Cleaning & Rodent Proofing Near San Marcos - Our Service Area
We clean and seal attics throughout the San Marcos metro and surrounding Hill Country communities. Typical response times are same-day for San Marcos proper, within 24 hours for Kyle and Redwood, and 24-48 hours for Lockhart, Buda, and the Austin outer ring including Shady Hollow, Lost Creek, and Hornsby Bend. We also service Lakeway, Lago Vista, Bastrop, and the full I-35 corridor from Austin to San Antonio on scheduled appointments. If you’re unsure whether your address falls in our route, call (737) 337-8049 and we’ll confirm availability.
Serving San Marcos, TX - Our Local Coverage Area
We’re based in the San Marcos area and know this community well, including our Attic Cleaning & Rodent Proofing in Lockhart. 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 San Marcos
Attic cleaning and rodent proofing is a multi-step service that removes contaminated insulation and waste, sanitizes the attic envelope, seals all rodent entry points, and restores thermal performance with new insulation and air sealing. It’s necessary when rodents, bats, or other pests have compromised your attic’s hygiene and energy efficiency. In San Marcos, we typically perform our Attic Cleaning & Rodent Proofing in San Marcos on homes with active roof rat colonies, squirrel damage, or legacy contamination from previous infestations. Call (737) 337-8049 for a free inspection to determine if your attic needs full restoration or targeted cleaning.
Most jobs take one to three days depending on attic size, contamination level, and whether restoration is included. A cleanout and sanitizing alone often finishes in a single day; full restoration with air sealing and new insulation typically requires two to three days. Weather can extend drying time for sanitizing treatments, particularly during San Marcos spring humidity. We provide a day-by-day schedule in your written scope before work begins, and we don’t leave until the documented photo record and blower-door results are in your hands.
Attic cleaning and rodent proofing in San Marcos typically costs $1,200-$4,500 for cleanout, sanitizing, and exclusion, with full restoration including new insulation ranging from $3,200-$8,500 for most homes. The price varies with attic square footage, contamination severity, insulation type, and any structural repairs needed. We publish a written price before any work starts - Haven Standard Clause 1 - and offer a Free Second Opinion on any competing written estimate. Call (737) 337-8049 for your specific quote; estimates are free.
Yes, we regularly remove and replace CertainTeed and Knauf insulation products, along with Johns Manville, Rockwool, and other major brands. We don’t have exclusive arrangements with any manufacturer, so we can recommend the material that fits your home’s needs and your budget rather than pushing a proprietary product. If your existing insulation is from one of these brands, we’ll note its condition and R-value in your inspection report and specify replacement options in your written estimate. Call (737) 337-8049 to schedule an inspection regardless of your current insulation brand.
We can typically inspect within 24-48 hours and begin work within 72 hours for active infestations. While we don’t advertise emergency wildlife removal (that’s a separate specialty), we prioritize San Marcos homes with confirmed active rodents, exposed wiring hazards, or HVAC contamination that’s affecting indoor air quality. A live person answers our line 24/7 to assess urgency and schedule accordingly. For immediate health hazards like heavy bat guano accumulation, we’ll coordinate with specialized remediation partners and manage the restoration ourselves.
All completed work is covered by our 365-Day Done Right Promise - if it’s not done right, we make it right. This includes re-treatment if rodents re-enter through sealed points within one year, and correction of any insulation or air-sealing defects. You receive the written warranty, the written scope, and your Documented Photo Record before anyone leaves your property. Haven Standard requires all three documents on every job, no exceptions. The warranty is transferable if you sell your San Marcos home within the coverage period.
Clear a path to your attic access and remove any stored items you want to keep from the attic floor - our crew will bag and remove everything else. Ensure we can access your electrical panel, water heater, and exterior perimeter on all sides. Pets should be secured in a separate room during sanitizing and fogging. You don’t need to be present for the full job, but someone over 18 must be available to sign the final documentation and receive your blower-door results and photo record. We’ll text you when the crew is on the way and when the job is complete.
Schedule Your Attic Cleaning & Rodent Proofing Service in San Marcos Today
Call (737) 337-8049 to speak with a live person, 24/7. We’ll schedule your free inspection, provide a written price before any work starts, and deliver your Documented Photo Record and blower-door results when the job is done. No voicemail loops, no callback windows measured in business days. Serving San Marcos, Kyle, Redwood, and surrounding Hill Country communities since 2016.
Written by Wes Okafor, Owner at Topside Attic Insulation San Marcos, serving San Marcos since 2016.