Icynene Attic Cleaning & Rodent Proofing in Seguin: What to Know First
We provide independent Icynene attic cleaning & rodent proofing in Seguin, with most jobs completed same-day and written pricing delivered before any work starts. Most attic cleaning & rodent proofing jobs for Icynene systems in Seguin run between $280 and $620 depending on contamination extent and whether rodent exclusion is needed. As an independent Icynene service provider, we carry OEM and quality aftermarket parts for all common Icynene lines found in Guadalupe County homes, including jobs we’ve done near Guadalupe Regional Medical Center where 1980s framing meets Hill Country humidity. Call (830) 549-6646 for a free estimate.
How Icynene Products Fail - and How We Fix Them
- Icynene Classic Max (open-cell) - moisture retention in vented attics. Classic Max is hydrophilic, meaning it absorbs and holds water vapor. In Seguin’s humid shoulder seasons, when attic ventilation is marginal and humidity spikes above 70%, we’ve pulled saturated Classic Max from rafter bays near the San Marcos River watershed that had turned into a mold substrate. We remove the contaminated foam, sanitize the substrate with an enzyme-based decontaminant, and only reinstall after verifying the attic ventilation meets Icynene’s minimum requirements - usually adding soffit baffles or a ridge vent modification.
- Icynene MD-R-200 (medium-density closed-cell) - rodent tunneling at perimeter joists. MD-R-200 cures rigid and dense, but rodents don’t eat it; they burrow alongside it where the foam meets the wood. In Seguin’s older neighborhoods like Walnut Branch and River Oaks, we’ve found Norway rat runs packed with nesting material compressed against MD-R-200 at the top plate. We cut back the affected perimeter, install 26-gauge galvanized steel mesh behind the foam line, then re-foam with matching density so the thermal barrier stays continuous.
- Icynene H2Foam Lite (low-density open-cell) - dust and allergen impaction in exposed applications. H2Foam Lite’s irregular cell structure traps airborne particulates over time. When homeowners in Seguin report allergy spikes after years of quiet operation, we find the surface has become a passive air filter. We HEPA-vacuum the exposed face, apply a low-VOC encapsulant rated for foam substrates, and in cases where the foam was left exposed against code, we install a proper ignition barrier - often intumescent paint or a thermal barrier board.
- Icynene LD-C-50 (low-density closed-cell) - delamination from OSB roof sheathing in summer heat. Seguin hits 100°F-plus for weeks each July and August. LD-C-50 can release from OSB when the sheathing cycles through extreme temperature swings, especially if the foam was applied to moisture content above 19%. We remove the delaminated sections with a specialized hot-wire cutter (not a saw, which tears cells), treat the sheathing with a mold preventative, and reapply only after moisture readings stabilize - usually a two-visit protocol.
- Icynene ProSeal Eco (water-blown closed-cell) - off-gassing and odor complaints in tight attics. ProSeal Eco uses water as a blowing agent, which is greener but can trap amine catalyst residuals in attics with limited air exchange. We’ve had Seguin homeowners describe a “cat urine” smell that traced to incomplete curing in a sealed cathedral ceiling. We ventilate aggressively, remove the top 1/2 inch of affected foam to release trapped volatiles, and run air quality verification before the attic is closed up. The fix is chemical, not cosmetic.
Our Icynene Attic Cleaning & Rodent Proofing Process

- 1
Call and scope. A live person answers. We ask about the Icynene line if you know it, the home’s age, and what you’re seeing - droppings, odors, visible mold, or temperature issues. We schedule a site visit with a written price to follow.
- 2
Site inspection with photo documentation. We enter the attic with full PPE, identify the Icynene product type by cell structure and density, and photograph every area of concern. You get these photos in your Documented Photo Record.
- 3
Contamination assessment and rodent exclusion plan. We map active runs, entry points, and compromised foam. For rodent jobs, we specify steel mesh gauge and placement - never spray foam alone as a rodent barrier, which is a shortcut we won’t take.
- 4
Written price before any work starts. Flat price, written scope, written warranty. Haven Standard Clause 1. No surprises.
- 5
Execution: removal, sanitizing, proofing, restoration. Contaminated foam comes out. Substrates get enzyme treatment or replacement. Rodent exclusion goes in. New foam matches the original Icynene specification - OEM when available, quality aftermarket when lead times or cost dictate, always disclosed in writing.
- 6
Verification and documentation. Where air sealing is part of the scope, we run a blower-door test - pressurization diagnostic measuring air leakage - before and after. The report goes home with you - the numbers do the talking. Every job closes with a Documented Photo Record and your copy of the 365-Day Done Right Promise.
Before
AfterWhat Icynene Attic Cleaning & Rodent Proofing Costs in Seguin
| Scenario | Typical Range | What Moves the Price |
|---|---|---|
| Light HEPA cleaning + surface sanitizing, no foam removal | $280 - $420 | Attic square footage, accessibility, contamination depth |
| Moderate foam removal (single Icynene type) + substrate sanitizing | $450 - $780 | Foam density (closed-cell removal takes longer), sheathing condition |
| Rodent exclusion + contaminated foam removal + reinstallation | $890 - $1,600 | Entry point count, mesh linear footage, refoam area |
| Full attic restoration (multiple Icynene lines, structural repairs) | $1,800 - $3,200 | OSB replacement, ventilation upgrades, blower-door verification |
Seguins Hill Country humidity and older housing stock - especially pre-1990 builds near downtown - tend to push jobs toward the higher end when ventilation was never upgraded. We also service Reflectix radiant barrier systems when they’re part of the same attic assembly. Call (830) 549-6646 for your written estimate; estimates are free and include the photo documentation.
Why Seguin Homeowners Call Topside Attic Insulation Seguin for Icynene Work

We’ve been independently owned and operated under The Haven Standard since 2016. Wes Okafor learned the building science side of this trade at Triton College in River Grove, IL, and he’s run blower-door tests on over 9,000 homes since - including plenty in Seguin where the combination of Icynene spray foam and unsealed top plates creates problems the original installer never anticipated.
Our technicians are background-checked and uniformed. Calls are answered by a live person, 24/7. We carry parts for Icynene Classic Max, MD-R-200, H2Foam Lite, LD-C-50, and ProSeal Eco, plus Reflectix when radiant barriers are involved. Every job gets a written price before work starts, a Documented Photo Record when we’re done, and the 365-Day Done Right Promise in writing. If it’s not done right, we make it right. No voicemail loops, no callback windows measured in business days.
FAQs
No - provided the work is done by a qualified insulation contractor who follows Icynene’s published installation guidelines for repairs and uses compatible replacement materials. As an independent Icynene service provider, we document every step with photos and specification sheets so any future warranty claim has a clear paper trail. Call (830) 549-6646 and we’ll review your warranty status during the free estimate.
OEM Icynene components typically ship within 3-5 business days from regional distribution. For urgent jobs - active rodent infestation, significant mold - we stock quality aftermarket foam that matches Icynene density and R-value specifications, installed with full disclosure in your written scope. Same-day starts are possible when the job is cleaning and exclusion without refoam.
Repair is almost always cheaper when less than 30% of the total foam area is compromised. Once contamination or rodent damage exceeds that threshold, or when multiple Icynene product generations are layered and incompatible, full removal and replacement becomes more cost-effective long-term. We give you both numbers in writing and let the math decide.
Yes, for exclusion and cleaning - we can seal entry points, install steel mesh barriers, HEPA-clean accessible surfaces, and sanitize in one visit. Reinstallation of removed foam requires a second visit once substrates are dry and verified. Call (830) 549-6646; if it’s an active infestation, we prioritize the exclusion to stop damage first.
Smell is the first indicator - musty or ammonia odors mean biological contamination. Visible staining on the foam surface, compressed or tunneled areas at joist edges, or temperature stratification (hot spots in a supposedly sealed attic) are next. We verify with moisture meters, thermal imaging, and borescope inspection where access is limited. The inspection and written estimate are free.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Seguin at Topside Attic Insulation Seguin, serving Seguin and nearby areas.