Icynene Crawl Space Encapsulation & Vapor Barrier Nationwide

Icynene Crawl Space Encapsulation & Vapor Barrier in Boerne: What to Know First

As an independent Icynene service provider, we handle crawl space encapsulation and vapor barrier work on Icynene-insulated homes across Boerne, typically scheduling within 48 hours and completing most jobs in a single day. Most Boerne homeowners with Icynene LD-C-50 or Icynene Classic Max open-cell spray foam in their crawl spaces see project costs between $2,800 and $5,400 depending on whether we’re addressing vapor barrier degradation, full encapsulation after moisture intrusion, or insulation replacement where the foam has pulled away from band joists. We publish a written price before any work starts, backed by our Haven Standard: Have it in writing. Call (830) 529-7780 for a free estimate with no voicemail loops.

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This page is for Boerne homeowners who found Icynene foam in their crawl space and need to know whether the existing work can be salvaged, what a proper encapsulation looks like in Hill Country clay soil conditions, and what they’ll pay before anyone shows up with a truck.

How Icynene Products Fail - and How We Fix Them

• Icynene Classic Max (open-cell) absorbing ground moisture - Open-cell foam is vapor-permeable by design, which works fine in an attic but becomes a liability in a Boerne crawl space where summer relative humidity regularly pushes 85% and clay soils wick moisture upward. When the vapor barrier beneath a Classic Max application degrades, the foam acts like a sponge against the subfloor. We remove the compromised foam, install a 12-mil reinforced polyethylene vapor barrier sealed at all seams with butyl tape, then replace with closed-cell Icynene MD-R-200 or an equivalent rigid foam board if the homeowner prefers.
• Icynene LD-C-50 shrinkage at band joists - LD-C-50, a lighter-density open-cell formulation, can contract 3-5% over its first two years as off-gassing completes. In Boerne’s older homes near the Cibolo Nature Center, we’ve seen this shrinkage create gaps at band joist interfaces where the most critical air sealing needs to happen. We cut back the separated foam, reseal the rim joist with acoustic sealant and flashing tape, then reinstall to manufacturer thickness specifications.
• Icynene ProSeal Eco (closed-cell) delamination from damp concrete - ProSeal Eco bonds aggressively when substrates are properly prepped, but Boerne crawl spaces poured in the 1980s-90s often have no vapor barrier beneath the slab. Capillary moisture breaks the adhesive interface. We test substrate moisture content with a calcium chloride kit before any foam touches concrete; readings above 3 lbs/1000 sq ft/24 hours mean we install a dimpled drainage mat and vapor barrier first, then foam.
• Icynene Classic Max dusting and degradation from rodent activity - Open-cell foam offers no nutritional value, but rodents tunnel through it readily. In Boerne’s established neighborhoods, we find LD-C-50 and Classic Max torn apart above vapor barriers that were installed without mechanical fastening. We remove contaminated foam, install galvanized hardware cloth at known entry points, then re-foam with a protective coating specified for the application.
• Icynene MD-R-200 (closed-cell) installed without thermal break at foundation walls - MD-R-200 at 2 inches achieves about R-14, but in Boerne’s climate that can create a condensation plane against cool block walls in February. We’ve pulled jobs where the foam looked fine but the block behind it was wet to the touch. We verify with an infrared scan, then add a thermal break layer of rigid foam board before the Icynene application if the wall temperature differential exceeds 15°F at design conditions.

Our Icynene Crawl Space Encapsulation & Vapor Barrier Process

1. 1
   Diagnostic visit with written scope - We inspect the crawl space with moisture meters, infrared camera, and a blower-door test if the home’s envelope is accessible. You get a written price before any work starts, with photos of what we found and what we propose.
2. 2
   Substrate preparation and moisture remediation - We address standing water, active leaks, and substrate moisture above acceptable thresholds. In Boerne’s clay soils, this sometimes means coordinating with a drainage contractor for exterior grading or French drain work before we encapsulate.
3. 3
   Material selection: OEM Icynene vs. equivalent alternatives - For homeowners who want to stay with Icynene products, we source through our distributor network. If the application calls for a different approach, we specify why, document the performance equivalence, and warrant the result identically. We also service Reflectix radiant barrier systems when they’re part of the existing assembly.
4. 4
   Installation with continuous documentation - Every seam, penetration, and termination is photographed. Vapor barriers are sealed with pressure-sensitive tape at overlaps, not just laid flat. Foam applications are checked for thickness with a pin gauge as we work.
5. 5
   Post-installation verification - Where applicable, we run a blower-door test to quantify air leakage reduction. For encapsulations without accessible envelope testing, we provide moisture content readings and thermal images showing the before-and-after condition of the crawl space.
6. 6
   Written warranty and photo record delivery - You receive a Documented Photo Record on a USB drive, the written warranty under our 365-Day Done Right Promise, and a printed scope confirming what was completed. Seal the envelope first. Then fill it.

What Icynene Crawl Space Encapsulation & Vapor Barrier Costs in Boerne

These ranges reflect what we’ve billed on actual Boerne jobs in the past 24 months. Every home is different. The only way to get your exact number is a free, no-obligation inspection with a written price before any work starts. Call (830) 529-7780 to schedule.

Why Boerne Homeowners Call Topside Attic Insulation Boerne for Icynene Work

We’ve been independently owned and operated under The Haven Standard since 2016, and we’ve encapsulated crawl spaces with Icynene products in Boerne homes going back to when LD-C-50 was the dominant open-cell specification in this market. Our technicians are background-checked and uniformed; calls are answered by a live person 24/7. We publish before-and-after blower-door numbers on every applicable job, and we don’t ask you to trust us about air leakage reduction - we hand you the pressure-differential report in pascals.

Our 365-Day Done Right Promise means if the crawl space humidity creeps back up or a seam lifts, we make it right. We also service Reflectix systems, so if your existing assembly mixes brands, we’re not guessing at compatibility. Wes Okafor keeps a well-used copy of the ACCA Manual J on his truck for the conversations that go deeper than standard specs.

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