Demilec Crawl Space Encapsulation & Vapor Barrier in Georgetown: What to Know First
Most Demilec crawl space encapsulation and vapor barrier jobs in Georgetown run between $2,800 and $6,500, with same-week scheduling once we complete the initial assessment. As an independent Demilec service provider, we work on the Demilec closed-cell and open-cell foam systems already installed in your crawl space - we don’t sell new Demilec product, but we know where it fails in this market and how to fix it without voiding what warranty remains. This page is for homeowners in Georgetown, Sun City, or along the San Gabriel River corridor who are seeing moisture, odor, or sagging insulation below their floors and want a written price before anyone starts work. Call (254) 970-2136 - a live person answers, 24/7.
How Demilec Products Fail - and How We Fix Them
- Demilec Heatlok HFO High Lift in vented crawl spaces: The HFO blowing agent performs well in conditioned space, but in Georgetown’s vented crawl spaces it can pull away from rim joists when seasonal humidity swings hit 80% plus in April and May. We see this most in older Georgetown homes near the river corridor where groundwater stays high. We remove the failed sections, seal the rim joist with closed-cell foam rated for below-grade exposure, then reinstall a proper vapor barrier - 10-mil minimum, taped seams, sealed to piers.
- Demilec Sealection 500 open-cell on crawl space ceilings: Open-cell foam is vapor-permeable by design. In Georgetown, where summer dew points climb into the low 70s, that means moisture moves through the foam and condenses on cooler ductwork above. The foam itself doesn’t fail, but the water dripping off your ducts isn’t a mystery - it’s physics. We cap open-cell crawl space applications with a vapor retarder coating or replace with closed-cell at the critical rim joist band.
- Demilec Heatlok XT in undersized crawl spaces: The 2.0 lb density and high R-value per inch tempts installers to spray thin in tight Georgetown crawl spaces with 18-inch clearances. What you get is a thermal bridge at every stud or joist where the foam couldn’t fully cover. We measure actual thickness with a pin gauge, mark the thin spots, and build out to full specified depth - usually 3 inches for the rated R-21 - rather than trusting the original installer’s word.
- Demilec foam-to-ground contact without proper barrier: Some Georgetown installers ran Demilec foam down block walls and stopped at the dirt floor, trusting a thin 6-mil poly sheet to handle ground moisture. That poly degrades in 3-5 years in our alkaline clay soils. We pull the old barrier, grade the floor for drainage, and install a 20-mil woven vapor barrier - WhiteCap or equivalent - with mechanical fastening to walls and sealed overlaps every 12 inches.
- Demilec job sites with missing air sealing before foam: This isn’t a Demilec product failure - it’s an installation sequence failure we see constantly. A crew sprayed Demilec closed-cell over unsealed plumbing penetrations and sill plate gaps. The foam looks fine, but you’re still pulling unconditioned air through every hole. We cut back, seal with backer rod and acoustic sealant, then restore the foam. Seal the holes first. Then we talk about R-value.
Our Demilec Crawl Space Encapsulation & Vapor Barrier Process
- 1
Call and schedule. A live person answers. We book an assessment, usually within 48 hours in Georgetown. You get a text when Wes or a named technician is en route - Haven Standard: Arrive on schedule.
- 2
Assessment with documentation. We enter the crawl space with a moisture meter, thermal camera, and pin gauge for foam thickness. We photograph every condition - sagging foam, standing water, rodent damage, thin spray - and record the findings. No guessing, no “trust me.”
- 3
Written price before any work starts. We specify OEM Demilec material versus quality aftermarket alternatives where appropriate, with the trade-off explained in plain terms. You sign the scope or you don’t - no pressure, no “today only” pricing.
- 4
Execution with air sealing first. Rim joists, sill plates, penetrations - sealed with appropriate material before any new foam or barrier goes in. On applicable jobs, we run a blower-door test - a pressurization reading that shows, in one number, how much air your building envelope is losing - before and after.
- 5
Installation of vapor barrier and insulation. 20-mil woven barrier on the ground, sealed to walls and piers. Closed-cell foam at rim joists where moisture load demands it. All work photographed.
- 6
Closeout with documented record. You receive photos, the written scope, warranty documentation, and - where applicable - before-and-after blower-door numbers and measured R-values. The 365-Day Done Right Promise is in writing. Then we clean up and leave.
Before
AfterWhat Demilec Crawl Space Encapsulation & Vapor Barrier Costs in Georgetown
| Scenario | Typical Range | What Moves the Price |
|---|---|---|
| Vapor barrier replacement only (existing foam intact) | $2,800 - $4,200 | Crawl space square footage, number of piers to seal around, whether old barrier removal is required |
| Partial Demilec foam repair + new vapor barrier | $4,000 - $5,800 | Linear feet of failed foam, accessibility (18-inch clearance vs. 30-inch), rim joist rebuild needed |
| Full encapsulation with Demilec foam remediation | $5,500 - $6,500+ | Total square footage, dehumidifier sizing for Georgetown humidity loads, structural repairs to subfloor from moisture damage |
These ranges reflect what we’ve written for Georgetown-area jobs since 2016. Every home is different - a 1950s pier-and-beam near downtown Georgetown with 14-inch clearance costs more to work in than a 2018 build in Sun City with full standing height. The written price you receive accounts for your actual conditions, not a guess. Call (254) 970-2136 for a free assessment and exact quote.
Why Georgetown Homeowners Call Topside Attic Insulation Georgetown for Demilec Work
We’ve worked attics and crawl spaces from Sun City Georgetown to homes backing up to the San Gabriel River corridor since 2016 - over 9,000 homes sealed and insulated, every one with a written price before work started and a documented record when the crew left. Wes Okafor and our technicians know Demilec’s product line because we’ve repaired enough of it to know where the shortcuts happen. We also work with Reflectix and other brands, so if your crawl space needs a hybrid solution - say, radiant barrier on ductwork plus foam at the rim - we don’t force-fit Demilec where it doesn’t belong.
Our 365-Day Done Right Promise applies to every job. If it’s not done right, we make it right. Background-checked, uniformed technicians. Live person on the phone, 24/7. And a Free Second Opinion on any written estimate - bring us a competing quote and we’ll read it with you, line by line.
FAQs
Demilec’s original installation warranty covers defects in material and application by a certified installer; repairs by an independent service provider like us do not automatically void it, though Demilec will not warrant our work. We document every repair with photos and material specs so you have a clear record of what was done and when. For warranty-safe practices on your specific installation, call us at (254) 970-2136 - we’ll review your original paperwork with you.
We can source OEM Demilec closed-cell and open-cell product when it’s the right choice for the repair, particularly for extensions of existing Heatlok XT or HFO High Lift installations where matching density and chemistry matters. We also use quality aftermarket foams - Icynene, Johns Manville, and others - where they perform equivalently or better for the specific Georgetown climate condition. The written scope specifies exactly what goes in your crawl space, with no proprietary lock-in.
Repair is almost always cheaper when the existing foam retains 70% or more of its specified thickness and shows no delamination from the substrate. Once we see widespread water damage, rodent nesting, or thin spray below 50% of specified depth, full removal and replacement becomes more cost-effective than chasing patch after patch. We give you both numbers in the written price so you can decide. Call (254) 970-2136 for an exact quote - estimates are free.
Most Demilec crawl space repairs in Georgetown are scheduled within a week of your call, with emergency assessments available within 24-48 hours for active water intrusion or subfloor damage. The actual repair typically takes 1-2 days for vapor barrier replacement, 2-3 days for partial foam repair, and 3-4 days for full encapsulation with dehumidifier install. We don’t start until you have the written price in hand.
The smell is almost always moisture hitting organic material - wood, old insulation, or the paper backing on previous batt installs - that the encapsulation didn’t fully isolate. In Georgetown’s clay soils, groundwater wicks through block walls and under vapor barriers that weren’t sealed to the wall or lacked proper drainage matting. We find the moisture source with a thermal camera and moisture meter, then fix the seal, not just the symptom. Call (254) 970-2136 and we’ll trace it.
Written by Wes Okafor, Owner, Topside Attic Insulation Georgetown at Topside Attic Insulation Georgetown, serving Georgetown and nearby areas.