Knauf Crawl Space Encapsulation & Vapor Barrier in New Braunfels: What to Know First
We provide independent Knauf crawl space encapsulation and vapor barrier service in New Braunfels, typically scheduling within 48 hours and completing most jobs in a single day. Our written price lands before any work starts - no exceptions - and you’ll walk away with a documented photo record plus, where applicable, before-and-after blower-door readings that show the actual air-sealing result in CFM50. This page is for Knauf owners dealing with crawl space moisture, musty odors, or insulation degradation who want to understand what failed, what it costs to fix, and how to verify the fix worked. Call (830) 243-6352 for a free estimate.
How Knauf Products Fail - and How We Fix Them
- Knauf Ecoseal System degradation in high-alkaline soils. The Guadalupe River corridor through New Braunfels carries caliche-heavy soil chemistry that can degrade Ecoseal’s butyl-based seam tape adhesive over 5-7 years. We’ve pulled failed tape in neighborhoods near River Road where the crawl space humidity stayed below 60% but the tape still released. We remove the degraded tape, mechanically fasten seams with Knauf-compatible pressure-sensitive tape rated for alkaline contact, then re-verify with a smoke pencil at the sill plate.
- Knauf Insulation DriTherm cavity-fill sagging in vented crawl spaces. DriTherm’s glass mineral wool absorbs airborne moisture in New Braunfels’ spring humidity spikes, then the batts sag away from floor joists and create thermal bypasses. We find this most often in 1980s-1990s slab homes near IH-35 where original venting was never corrected. Our fix: remove saturated batts, install a 6-mil Knauf vapor barrier or full encapsulation depending on moisture load, then replace with DriTherm only after the space is conditioned or sealed.
- Knauf MiraVista reflective insulation delamination at staple points. MiraVista’s aluminum facing separates from the polyethylene core when staple corrosion occurs in crawl spaces with seasonal flooding history - common in the Comal County floodplain areas. The fix isn’t more staples; it’s switching to Knauf-approved washer-bar fasteners or moving to a full encapsulation system that eliminates the need for cavity-facing attachment entirely.
- Knauf Ecobatt formaldehyde-free binder breakdown in rodent-affected crawl spaces. Ecobatt’s plant-based binder attracts foraging rodents more than phenolic-bound products, and we’ve documented accelerated breakdown in rural New Braunfels properties near the Cibolo Creek watershed. We remove contaminated Ecobatt, rodent-proof with 1/4-inch hardware cloth at all penetrations, then reinstall only after a vapor barrier or encapsulation removes the nesting habitat.
- Knauf blow-in blanket system (BIBS) settlement at rim joists. BIBS density can settle 15-20% over time in crawl spaces with active air movement, leaving the rim joist - the most critical thermal bridge in any crawl space - exposed. We find this in homes near the Schlitterbahn area with original construction gaps at the band joist. Our repair: dense-pack the rim with Knauf Jet Stream MAX at 1.5 lbs/ft³ after air sealing, then verify with thermal imaging to confirm continuous coverage.
Our Knauf Crawl Space Encapsulation & Vapor Barrier Process
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Call and scheduling. A live person answers, 24/7. We book a diagnostic visit, usually within 48 hours in New Braunfels.
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On-site inspection and moisture mapping. We measure relative humidity at three crawl space points, identify the Knauf product line installed, and photograph all failure modes. You get a written price before we leave - Haven Standard Clause 1.
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Parts decision: OEM Knauf or quality aftermarket. For vapor barriers, we stock Knauf’s 6-mil and 10-mil reinforced polyethylene. For fasteners and seam tape, we match the Knauf spec or use StoGuard or 3M 8067 where alkaline soil demands it. We explain the trade-off and you choose.
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Air sealing first, then insulation. We seal rim joists, sill plates, and penetrations with Knauf Ecoseal or closed-cell foam depending on gap size. The blower-door test comes next - a pressurization reading that shows, in one number, how much conditioned air your building envelope is losing.
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Encapsulation or vapor barrier installation. Full encapsulation: 10-mil reinforced liner up piers, sealed seams, dehumidifier sizing. Vapor barrier only: 6-mil ground cover with 12-inch overlap, sealed to foundation walls. We never blow new insulation over unsealed air leaks.
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Post-work verification and documentation. Final blower-door test, thermal imaging spot-check, documented photo record uploaded to your file. The number on the blower-door printout tells you what the insulation did. Everything else is just talk.
Before
AfterWhat Knauf Crawl Space Encapsulation & Vapor Barrier Costs in New Braunfels
Most Knauf crawl space vapor barrier jobs in New Braunfels run between $1,800 and $3,400 for a standard 1,200-1,800 square foot footprint. Full Knauf encapsulation with 10-mil reinforced liner, sealed piers, and dehumidifier rough-in typically falls between $4,200 and $7,800.
What moves the price: accessibility (crawl space height below 18 inches adds labor), existing Knauf product removal and disposal, extent of air sealing required at rim joists, and whether we find active moisture intrusion requiring drainage correction before encapsulation. Homes near the Guadalupe floodplain or with historical spring flooding often need the higher end of the range.
We provide a free second opinion on any written estimate you’ve already received - bring us the competing quote and we’ll read it with you. Call (830) 243-6352 for your written price.
Why New Braunfels Homeowners Call Topside Attic Insulation New Braunfels for Knauf Work
We’ve sealed and insulated over 9,000 homes since 2016, and a growing share of our New Braunfels crawl space work involves correcting Knauf installations that failed prematurely due to moisture, rodent activity, or incomplete air sealing. Wes Okafor, our owner, runs a blower-door test before and after every applicable job - you’ll get printed pre- and post-CFM50 readings, not a verbal estimate of improvement. We keep copies filed by address, which has helped more than one homeowner answer a buyer’s inspector during a sale.
We’re an independent Knauf service provider - not affiliated with or authorized by Knauf - which means we also work with Reflectix and other brands when a different material suits the job better. The 365-Day Done Right Promise applies to all work: if it’s not done right, we make it right, backed by a written scope and warranty delivered before anyone lifts a tool.
FAQs
No. Knauf’s product warranties cover material defects, not who installs or services them. As an independent Knauf service provider, we use Knauf-specified materials and installation practices that maintain any remaining material warranty coverage. For warranty claims on defective product, we document our work so you have records if Knauf requests them. Call (830) 243-6352 if you have specific warranty paperwork you’d like us to review.
We stock Knauf 6-mil and 10-mil vapor barrier rolls, Ecoseal tape, and compatible fasteners in our New Braunfels warehouse. Specialty items like MiraVista facing or BIBS netting ship from Knauf’s Dallas distribution center with 2-3 day lead time. We don’t start work until all materials are on hand - no partial jobs left open to humidity. Call (830) 243-6352 to check current stock on your specific Knauf line.
Repair is cheaper short-term - typically $800-$1,500 to remove wet batts, air seal, and reinstall. But if your crawl space humidity runs above 60% for more than three months a year, which is normal in New Braunfels from April through October, the repair will fail again. Full encapsulation costs more upfront but eliminates the moisture source. We show you the humidity data from our inspection and let you decide. Call (830) 243-6352 for the numbers on your specific home.
Most jobs finish in one day. Two days if we’re removing significant existing material, correcting drainage, or working in a crawl space under 18 inches where movement is restricted. We schedule within 48 hours of your call and confirm the day before with a text when your technician is en route. Call (830) 243-6352 to check this week’s availability.
We measure. Before work starts, we record crawl space humidity and, where the house allows, run a blower-door test to establish baseline air leakage. After encapsulation, we re-measure humidity at the same points and re-test if air sealing was part of the scope. You get the documented photo record and the printed test numbers. If the humidity hasn’t dropped to target, we find out why and fix it under the 365-Day Done Right Promise. Call (830) 243-6352 to schedule your diagnostic.
Written by Wes Okafor, Owner, Topside Attic Insulation New Braunfels at Topside Attic Insulation New Braunfels, serving New Braunfels and nearby areas.