Demilec Attic Cleaning & Rodent Proofing in Seguin: What to Know First
We provide independent Demilec attic cleaning and rodent proofing in Seguin, typically completing most jobs within one to two days once we have assessed the space. Our written price comes before any work starts, and we publish before-and-after blower-door numbers on every applicable job so you can verify the air-sealing result in a single figure. This page is for Demilec owners in Seguin and nearby Hill Country areas - including homes near Guadalupe Regional Medical Center and the older neighborhoods off King Street - who need attic cleanout, sanitizing, decontamination, rodent exclusion, or full restoration after rodent damage. Call (830) 549-6646 for a free estimate and a written scope before anyone lifts a tool.
How Demilec Products Fail - and How We Fix Them
- Demilec SEALECTION 500 open-cell foam degrades when saturated by rodent urine. In Seguin’s humid subtropical climate, attic moisture already runs higher than in drier zones; once rodents nest in SEALECTION 500, the ammonia breaks down the polymer bonds and the foam turns crumbly. We remove the contaminated foam entirely, sanitize the substrate with an enzyme treatment, and replace it with new material only after the attic is sealed against re-entry.
- Demilec HEATLOK Soya closed-cell foam develops voids where rodents tunnel for nesting material. The soy-based content attracts rodents seeking fiber, and their chewing creates air pockets that defeat the foam’s thermal barrier. We cut out tunneled sections, inspect the full cavity with a borescope, and reinstall to original thickness with proper pass counts.
- Demilec HEATLOK XT loses adhesion at the foam-to-deck interface after prolonged rodent traffic. The detachment is often invisible from below; we find it during our blower-door test when the attic pressurization shows unexpected leakage paths. Our fix is full removal of the detached section, re-cleaning the substrate, and reapplication with corrected temperature and humidity controls.
- Demilec AgriThane agricultural-grade foam, occasionally found in Seguin outbuildings converted to living space, lacks the fire retardant required for residential code. When we encounter it during rodent-damage restoration, we document it for the homeowner, remove it per local disposal requirements, and replace with code-compliant HEATLOK XT or SEALECTION 500 per the written scope.
- Demilec foam around can lights and top plates becomes a rodent highway when air sealing is skipped or degraded. The foam itself is intact but the perimeter gaps reopen from thermal cycling and rodent compression. We remove the compromised perimeter seal, re-establish the air barrier with compatible Demilec products, and verify with post-sealing blower-door numbers.
Our Demilec Attic Cleaning & Rodent Proofing Process
- 1
Call and scheduling. A live person answers 24/7. We book a site visit, and you receive a text when your technician is en route under Haven Standard: Arrive on schedule.
- 2
Blower-door test and attic assessment. We pressurize the house to measure conditioned air loss, then inspect the attic with photo documentation. We note Demilec product type, contamination extent, and rodent entry points.
- 3
Written price and scope. Before any work starts, you get a flat price, written scope, and written warranty. Haven Standard Clause 1, no exceptions.
- 4
Removal and decontamination. Contaminated Demilec foam comes out. We HEPA-vacuum, apply enzyme sanitizer, and dispose per Texas regulations.
- 5
Air sealing and rodent exclusion. Top plates, can lights, penetrations, and entry points are sealed. We use Demilec-compatible materials or quality alternatives from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, or GreenFiber - no proprietary lock-in.
- 6
Replacement, test, and documentation. New insulation or foam goes in. We run the blower-door test again and hand you the printed pre- and post-installation report with ACH50 numbers. The report goes home with you - the numbers do the talking.
Before
AfterWhat Demilec Attic Cleaning & Rodent Proofing Costs in Seguin
Most Demilec attic cleaning and rodent proofing jobs in Seguin run between $2,400 and $5,800 for a typical 1,800 to 2,800 square foot home. Attic cleanout and sanitizing alone usually fall between $1,200 and $2,200. Rodent proofing and exclusion add $800 to $1,800 depending on roofline complexity and entry point count. Full restoration with Demilec foam removal and replacement pushes the upper range, especially if we are working around original framing in pre-1980s homes near downtown Seguin where access is tight.
What moves the price: square footage, contamination depth, foam type and thickness, whether the job requires full removal or spot repair, and how many rodent entry points we need to exclude. We also service Reflectix radiant barrier systems when they are part of the same attic assembly.
Call (830) 549-6646 for a free estimate. We will read any written estimate you already have with you - our Free Second Opinion - and give you our own written price before any work starts.
Why Seguin Homeowners Call Topside Attic Insulation Seguin for Demilec Work
We have sealed and insulated over 9,000 homes since 2016, every one with a written price first and a documented record at the end. Our 365-Day Done Right Promise means if it is not done right, we make it right. Wes Okafor, our owner and lead technician, runs a blower-door test before and after every applicable job and hands customers the printed report with actual ACH50 numbers. In Seguin, we regularly see spring and summer humidity accelerate rodent contamination in Demilec foam - particularly in homes with passive attic ventilation that does not keep pace with Gulf moisture. Our crew knows the difference between SEALECTION 500 and HEATLOK XT failure modes, and we stock both OEM Demilec materials and quality alternatives so you are not locked into a single product line. Calls are answered by a live person, 24/7.
FAQs
Demilec’s limited warranty covers original installation defects, not damage from rodents or subsequent modification. As an independent Demilec service provider, we document our work with photos and written scope so any future warranty claim on intact original foam can be supported with clear records. For warranty-safe practices on partial restoration, we use Demilec-compatible application methods and temperatures. Call (830) 549-6646 to review your specific installation date and product line.
We typically schedule within 24 to 48 hours for active rodent infestations or severe contamination, and same-day assessment is often available. A live person answers calls 24/7 to book your slot. Call (830) 549-6646 - estimates are free and the written price comes before any work starts.
Spot repair is cheaper when contamination is localized to one or two bays, typically saving 30 to 40 percent over full removal. Full replacement is necessary when rodent urine has saturated multiple areas, when tunneling has created voids throughout the foam layer, or when the original application was below current code. We assess this during our blower-door test and attic inspection, then put both options in the written scope with separate prices. Call (830) 549-6646 for an exact quote.
We stock common Demilec products including SEALECTION 500 and HEATLOK XT, plus alternatives from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, and GreenFiber. For discontinued Demilec lines, we source equivalent-performing materials with documented specs. Most Seguin jobs start within a week of written approval.
Yes. Our blower-door test separates air-leakage location from insulation condition. If the foam is intact but perimeter sealing has failed, the numbers show leakage at joints and penetrations, not through the foam body. If the foam itself is compromised, the test pattern changes and we document it with borescope photos. You get both the diagnosis and the fix in the written scope before work begins.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Seguin at Topside Attic Insulation Seguin, serving Seguin and nearby areas.