Icynene Insulation Removal & Replacement in San Marcos: What to Know First
We provide independent Icynene insulation removal and replacement in San Marcos, typically completing residential jobs in one to two days depending on attic access and contamination level. Most full removals and replacements in a home this size run between $3,200 and $6,800, and we bring a written price before any work starts - no exceptions. This page is for homeowners who know they have Icynene spray foam or open-cell insulation in their attic or walls and need it removed due to failure, rodent damage, water intrusion, or pre-renovation prep. Call (737) 337-8049 to schedule a free estimate with a written scope.
How Icynene Products Fail - and How We Fix Them
- Icynene Classic Max (open-cell) - moisture retention in San Marcos humidity. This line absorbs and holds water vapor when the vapor barrier is compromised or the attic ventilation is undersized for our 70%+ spring humidity. We see this in older homes near the Blanco River corridor where bulk water from roof leaks saturates the foam and it won’t dry. Our fix: remove the affected foam in layers, dry the substrate with targeted airflow, then replace with closed-cell or a hybrid system matched to the ventilation reality.
- Icynene MD-R-200 (medium-density closed-cell) - delamination from OSB roof decking. When applied too thick in a single pass or over a cold substrate during our winter temperature swings, the foam pulls away from the sheathing and creates air gaps that defeat the R-value. We cut out the delaminated sections, mechanically fasten replacement foam in lifts, and verify adhesion with a pull test - documented in your photo record.
- Icynene LD-C-50 (low-density open-cell) - rodent nesting and waste contamination. The soft, porous structure is ideal habitat for roof rats once they breach the envelope. In San Marcos, we trace this most often in homes near greenbelts or the Spring Lake Natural Area. We remove all contaminated foam, treat the substrate with an enzyme cleaner, seal entry points with copper mesh and foam, then reinstall with a rodent-resistant barrier layer.
- Icynene Water Blown Series - chemical off-gassing after water damage. The water-blown catalyst can reactivate and produce odor when saturated. We’ve pulled this from three homes near Texas State after HVAC condensate line failures in attics. Full removal is the only fix; partial replacement leaves the odor source. We bag and remove per Texas Commission on Environmental Quality guidelines for polyurethane waste.
- Icynene H2Foam Lite - shrinkage at stud cavities in wall applications. The lighter density shrinks 2-4% during cure, pulling away from framing in our hot-wall climate where daily expansion cycles stress the bond. We remove the shrunken foam with a specialized hot-wire cutter, reseal the cavity with a higher-yield closed-cell product, and verify with thermal imaging.
Our Icynene Insulation Removal & Replacement Process

- 1
Site assessment and blower-door baseline. We pressurize the house - a blower-door test, a pressurization reading that shows, in one number, how much air your building envelope is losing - and document the CFM50 before we touch anything.
- 2
Written price and scope delivered. Under Haven Standard Clause 1: flat price, written scope, written warranty before anyone lifts a tool. No work starts without your signature.
- 3
Containment and mechanical removal. We establish negative air pressure in the work zone, then remove Icynene with hot-wire cutters, oscillating scrapers, or controlled grinding depending on density and substrate. All debris is bagged and hauled; we don’t leave a dumpster in your driveway.
- 4
Substrate repair and air sealing. Top plates, can lights, and penetrations are sealed before any new insulation goes in. The R-value tells you how slow heat moves through the material - the blower-door number tells you whether any of that matters.
- 5
Replacement installation and verification. We install your specified replacement material, then run a second blower-door test. You get a single printed page showing before and after air-changes-per-hour. The 365-Day Done Right Promise applies from that moment.
- 6
Documented Photo Record delivery. Every stage is photographed and delivered with your final paperwork - included on every job, not available on request.
Before
AfterWhat Icynene Insulation Removal & Replacement Costs in San Marcos
| Scenario | Typical Range | What Moves the Price |
|---|---|---|
| Partial open-cell removal (moisture damage, under 500 sq ft) | $3,200 - $4,500 | Height of attic, decking condition, disposal fees to Caldwell County landfill |
| Full attic open-cell removal and replacement | $4,800 - $6,800 | Roof pitch over 8/12, presence of HVAC equipment, need for temporary climate control |
| Closed-cell removal from roof deck (delamination) | $5,500 - $8,200 | Multiple lift application, pull-test verification, sheathing replacement if OSB is compromised |
| Rodent contamination remediation with full removal | $4,200 - $7,100 | Extent of waste penetration, need for substrate enzyme treatment, entry-point sealing scope |
These are real numbers for San Marcos homes we’ve worked on, not teaser rates. The only way to know your exact price is a site visit - estimates are free, written, and delivered before you decide. Call (737) 337-8049 to schedule.
Why San Marcos Homeowners Call Topside Attic Insulation San Marcos for Icynene Work

We’re an independent Icynene service provider - not affiliated with or authorized by Icynene - which means we evaluate your job on its technical merits, not on warranty compliance with a manufacturer. Wes Okafor trained in building science at Dawson Technical Institute and has spent two decades diagnosing why attics fail rather than filling them. Our crew knows Icynene’s product line because we’ve removed and replaced it across the San Marcos area, including the slab-on-grade homes near the Texas State corridor where top-plate air sealing is routinely skipped and always felt in the utility bill. We also service Reflectix and other brands, so if your home has a mixed insulation history, we don’t need to call in another contractor. Every job closes with a Documented Photo Record and, where applicable, before-and-after blower-door numbers you can hold in your hand. Calls are answered by a live person, 24/7.
FAQs
It usually does, since manufacturer warranties typically require authorized applicators for any modification. As an independent service provider, we don’t represent Icynene on warranty matters - we document the condition we found and the work we performed so you have a clear record for any future claim or dispute. Call (737) 337-8049 and we’ll review your specific situation.
We can match the performance characteristics - R-value, density, vapor permeance - but not necessarily the exact Icynene SKU, especially if the original line has been reformulated or discontinued. We source materials from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber with no proprietary lock-in, so we specify what fits your building science need, not what matches a label. For an exact assessment of your options, call (737) 337-8049 for a free written estimate.
Spot repair is cheaper upfront but often costs more over five years because damaged open-cell foam hides moisture pathways that degrade surrounding material. We recommend full removal when the damage exceeds 15-20% of the installed area, when there’s been bulk water intrusion, or when rodents have contaminated the material - all common in San Marcos’s humid climate and active wildlife corridors. Call (737) 337-8049 and we’ll show you the boundary on your specific job.
Most jobs are scheduled within 3-5 business days of estimate approval, though emergency situations - active roof leaks, severe odor from chemical reactivation - can be expedited. We don’t manufacture urgency; we keep a realistic schedule and show up when we say we will. Under Haven Standard: Arrive on schedule, you get a named technician and a text when they are on the way. Call (737) 337-8049 to check current availability.
You get four documents: the original written scope and price, the before-and-after blower-door test results on a single printed page, the Documented Photo Record from every stage of work, and the written 365-Day Done Right Promise. No paperwork is held back; no digital portal is required. Everything is in your hands before we leave.
Ready to get a written price for your Icynene removal and replacement? Call (737) 337-8049 today. Estimates are free, detailed, and delivered in writing before any work starts - Haven Standard Clause 1, no exceptions.
Written by Wes Okafor, Owner, Topside Attic Insulation San Marcos at Topside Attic Insulation San Marcos, serving San Marcos and nearby areas.