CertainTeed Attic Cleaning & Rodent Proofing in San Marcos: What to Know First
We provide independent CertainTeed attic cleaning and rodent proofing in San Marcos, with most jobs completed in one to two days and a written price delivered before any work starts. Our process treats air sealing as a hard prerequisite, not an afterthought, because blowing new insulation over a contaminated, leaky attic floor is how you end up doing the job twice. If you’re seeing droppings, compressed insulation, or catching whiffs of ammonia when the HVAC cycles, the problem is already affecting your indoor air quality and your system’s efficiency.
This page is for CertainTeed owners in San Marcos who want to know what failed, what it’ll take to fix it, and what it’ll cost before a technician shows up. Call us at (737) 337-8049 for a free estimate with a written scope and price.
How CertainTeed Products Fail - and How We Fix Them
- CertainTeed InsulSafe SP blowing wool compacts under rodent traffic and repeated moisture exposure from San Marcos’s spring humidity spikes. Once the fibers mat, the R-value drops and the voids become rodent highways. We remove the contaminated batts, seal the deck, then reinstall fresh material only after the blower-door number proves the envelope is tight.
- CertainTeed SpeedyR liner systems in attics with squirrel or raccoon entry show torn vapor barriers first, usually at the mechanical penetrations where the liner meets duct boots. The tear lets conditioned air into the attic, which drives humidity and attracts more pests. We patch with OEM-compatible liner or replace the run depending on tear extent, always after sealing the entry points with 26-gauge galvanized flashing.
- CertainTeed MemBrain smart vapor retarder installed in older San Marcos slab-on-grade homes near the Texas State corridor often gets compromised when rodents nest against the warm-side surface. The retarder’s variable permeability can’t function when urine salts crystallize in the polymer layer. We strip the damaged sections, treat the substrate with enzyme cleaner, and reinstall only after verifying the attic’s dew point behavior won’t retrigger the same failure.
- CertainTeed TrueComfort blown-in fiberglass in homes built 2015-2020 settles faster when contaminated with rodent feces, which add weight and accelerate the natural compaction cycle. The result is a 15-20% R-value loss by year five in San Marcos’s cooling-dominated climate. We extract the soiled material, HEPA-vacuum the deck, and reinstall to full thickness with a fresh blower-door target.
- CertainTeed CertaSpray open-cell foam in hybrid attic assemblies becomes a rodent nesting substrate when the ignition barrier coating is gnawed through at truss chords. The foam itself is inert, but the cavity behind it becomes a protected cavity. We remove the damaged foam, treat the framing, and reapply with a revised ignition barrier detail that accounts for local pest pressure.
Our CertainTeed Attic Cleaning & Rodent Proofing Process
- 1
Inspection with photo documentation. We photograph every contaminated area, every entry point, and every compromised CertainTeed product layer. You get these photos in your written scope.
- 2
Blower-door test before any disturbance. We pressurize the house to measure baseline air leakage - the number that tells us whether your attic floor is actually a sieve. The R-value tells you how slow heat moves through the material - the blower-door number tells you whether any of that matters.
- 3
Contaminant removal and deck treatment. All soiled insulation comes out. We HEPA-vacuum the deck, apply enzyme-based sanitizer to break down urine proteins, and let it dry to specification.
- 4
Air sealing at top plates, penetrations, and chases. This is the step that gets skipped. We seal with caulk, foam, and fire-rated putty where code requires, then run a second blower-door test to prove the reduction.
- 5
Rodent exclusion with galvanized hardware cloth and flashing. Entry points get 1/4-inch mesh minimum, secured with screws not staples, at all roof-wall junctions, vent screens, and soffit gaps. We map every seal on your photo record.
- 6
Reinstall CertainTeed or compatible material, final blower-door test, and written closeout. You walk away with before-and-after pressurization numbers, the photo record, and the 365-Day Done Right Promise in writing.
Before
AfterWhat CertainTeed Attic Cleaning & Rodent Proofing Costs in San Marcos
Most attic cleaning and rodent proofing jobs in San Marcos run between $2,400 and $5,800 for a typical 1,800-2,400 square foot home with CertainTeed insulation in place. The low end covers light contamination, intact vapor barriers, and two to three entry points. The high end involves full insulation extraction, multiple MemBrain or SpeedyR liner replacements, and extensive deck sealing in older homes with unsealed top plates.
What moves the price: how much contaminated material must come out, whether the CertainTeed product can be cleaned in place or needs replacement, how many rodent entry points we find, and whether the attic floor needs full air sealing before new material goes in. We also service Reflectix radiant barrier systems when they’re part of the assembly, though those rarely require the same level of decontamination.
Every estimate is free, written, and delivered before any work starts. Bring us a competing quote - we offer a Free Second Opinion on any written estimate.
Why San Marcos Homeowners Call Topside Attic Insulation San Marcos for CertainTeed Work
We’re independently owned and operated under The Haven Standard since 2016, and we’re not affiliated with or authorized by CertainTeed - we’re an independent CertainTeed service provider who happens to know their product lines because we’ve removed, cleaned, and reinstalled them in over 9,000 homes. Wes Okafor, our owner, trained in building science at Dawson Technical Institute and spent two decades diagnosing why attics fail before filling them. His crew knows the difference between InsulSafe SP and TrueComfort compaction patterns, and they know which San Marcos neighborhoods built during the 2015-2020 boom have the unsealed top plates that make rodent problems worse.
Every job gets a written price before work starts, a Documented Photo Record, and on applicable jobs, before-and-after blower-door readings. Calls are answered by a live person, 24/7. The 365-Day Done Right Promise applies to everything we touch.
FAQs
No - the product warranty covers material defects, not field modifications or removal by a qualified contractor. CertainTeed’s limited warranty on blown and batt products is tied to original installation standards, not subsequent service work. We document the condition of every product layer we disturb so there’s a clear record if a defect claim ever arises. Call (737) 337-8049 if you want us to review your warranty paperwork during the estimate.
We use OEM CertainTeed when the homeowner requests it or when the existing system requires matching for vapor retarder compatibility. For standard blown fiberglass, we also source quality aftermarket from Owens Corning, Johns Manville, and Knauf with equivalent density and R-value per inch. We explain the trade-off on every estimate - OEM for warranty continuity, aftermarket for cost - and we never lock you into a proprietary product.
Replace when more than 30% of the insulation surface is contaminated, when the vapor retarder is torn in multiple locations, or when the blower-door test shows leakage above 3,000 CFM50 in a home under 2,500 square feet. Repair in place makes sense for localized contamination with intact barriers and tight envelope numbers. We’ll give you both numbers on the estimate - repair scope and replacement scope - so you can decide with the facts.
Most inspections happen within 48 hours of your call, and scheduling for the work itself typically falls within one week. Emergency situations - active rodent entry, HVAC contamination, or compromised vapor barriers during humid weather - get priority. A live person answers calls 24/7, so you’re not waiting through a callback queue.
You receive a written scope completion checklist, the Documented Photo Record showing before, during, and after conditions, and on jobs with air sealing, the before-and-after blower-door test results printed on a single page. The 365-Day Done Right Promise and any applicable warranty terms are included in the same packet. Haven Standard: Have it in writing.
Ready to get your CertainTeed attic cleaned, sealed, and rodent-proofed with numbers you can verify? Call (737) 337-8049 for a free estimate with a written price before any work starts.
Written by Wes Okafor, Owner, Topside Attic Insulation San Marcos at Topside Attic Insulation San Marcos, serving San Marcos and nearby areas.