Demilec Spray Foam Insulation in Austin: What to Know First
We provide independent Demilec spray foam insulation service in Austin, from open-cell and closed-cell applications to rim joist and roof deck work. Most jobs are quoted within 24 hours and completed the same week, with a written price in your hand before any material touches your home. If you’ve got a Demilec installation that’s underperforming or you’re considering it for new construction, we’re the crew that will tell you exactly what’s happening and what it costs before you commit to anything.
This page is for Austin homeowners who own or are planning Demilec spray foam and want straight answers about how it fails, what repairs cost, and whether your current installation was done right. If you suspect a problem, call (361) 418-9997 and we’ll walk you through what to look for before we ever schedule a visit.
How Demilec Products Fail – and How We Fix Them
Demilec makes solid foam systems, but every spray foam product line has its failure patterns. In Austin specifically, the heat and humidity expose these issues faster than milder climates. Here’s what we regularly find on Demilec installations across Austin homes:
- Sealection 500 open-cell shrinkage pull-away: Open-cell foam can contract slightly in the first few weeks after installation if the substrate temperature fell below the manufacturer’s recommended window during application. On Demilec Sealection 500 jobs, we’ve seen this as visible gaps between the cured foam and roof decking, especially in attics sprayed during December and January when Austin nights drop into the 30s. The foam skin looks intact from the living space, but a gap of even a quarter inch along rafters cuts the air-sealing benefit. Our fix involves removing the affected section and reshooting once the deck is within spec temperature, then verifying with a thermal scan rather than trusting appearance.
- Heatlok HFO Pro low-density streaking in cathedral roofs: Closed-cell foam should be uniform, but we’ve seen streaking where passes overlap incorrectly or where the B-side chemical wasn’t fully mixed. On Heatlok HFO Pro jobs, streaking often shows up as alternating dark and light bands that an infrared camera reads as inconsistent thickness. The real cause is usually a gun setting issue during the original install, not a bad batch of chemical. We correct it by auditing the whole roofline with thermal imaging, identifying thin zones, and layering a correctly-mixed pass over the problem areas. This is a repair that’s cheaper than a full remove-and-redo, but only works when the original foam is properly adhered.
- Sealection Agribalance foam pull-back at the top plate: In Austin slab-on-grade homes built in the 1990s and early 2000s, we see Demilec foam that has pulled back from the sill plate and top plates in unconditioned attics. This isn’t a product defect. It happens when the foam was sprayed over dust or construction debris that prevented a clean bond, and the Texas heat cycling eventually separated the cured foam. The gap lets conditioned air escape straight into the attic. We remove the loose material, properly clean the framing, and shoot a new seal bead that’s tooled into the corner.
- Heatlok Soy 200 delamination on metal roof decks: On Austin barndominiums and metal-roofed workshops, we’ve seen Demilec Heatlok Soy 200 separate from the metal substrate as a smooth sheet rather than flaking in pieces. That’s a moisture symptom, not a chemical issue. Condensation forms on the underside of metal roofing when humid Austin air hits it, and foam sprayed over even a thin film of moisture will never bond. We inspect for roof leak paths and condensation points before doing anything, because reshooting over the same condition just repeats the failure.
- Open-cell density problems in rim joist cavities: Rim joist work requires the foam to be dense enough to stop air movement but not so thick it prevents drying. On Demilec open-cell applications in Austin crawl spaces and basements, we’ve found foam that was shot too thin because installers treated the rim the same as a wall cavity. The symptom is a draft you can feel at the floor edge in winter, plus higher humidity in the crawl space. We measure the actual installed depth, compare it to the R-value the original contract promised, and build the layer up correctly.
If you can feel a hot spot in your house, there’s a reason – and it’s usually something we can fix.
Our Demilec Spray Foam Insulation Process
Every Demilec job we run in Austin follows the same disciplined sequence, because shortcuts are what cause most foam failures in the first place:
- 1
Call and real conversation: You reach a live person at (361) 418-9997 – not a voicemail tree. We ask what you’re feeling in the house: hot rooms, drafts, high bills. If you know you have Demilec product, tell us; if you’re not sure, we’ll identify it on site.
- 2
On-site inspection and thermal work: We visit your Austin home and look at the actual installation condition. We use a thermal camera and a smoke pencil to find air movement, because visible gaps are only part of the story. We also check substrate temperature and moisture before recommending any reapplication.
- 3
Written price, before anything else: This is a hard rule with us. You get a written number covering the full scope of work before we ever break out a gun or a ladder. No door-step adjustments, no “we found more once we opened it up” surprises. If the estimate changes, we eat it, not you.
- 4
The repair or install: We remove failed foam where necessary, properly prep the substrate (which means cleaning, drying, and verifying temperature), and apply the Demilec product at the right thickness and density. We don’t guess on depth – we measure as we go, because R-value is just a number if the application is sloppy.
- 5
Verification and cleanup: We rescan with thermal imaging to confirm the foam is actually doing its job, then clean up completely. You shouldn’t find a single trim scrap or foam drip when we leave.
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Written guarantee and follow-through: Every repair and install includes a written guarantee. If it fails within 365 days, we come back and fix it at no charge. That’s the whole Kingswell Guarantee: a written price, a real arrival window, a clean job site, a written guarantee, and a free return visit if the work doesn’t hold.
What Demilec Spray Foam Insulation Costs in Austin
Spray foam work is priced by board foot and complexity, not by a flat rate, so here are honest ranges for the Demilec scenarios we handle most often in Austin:
- Open-cell rim joist sealing in a typical Austin crawl space or basement: $500 to $1,400, depending on linear footage and access.
- Closed-cell Heatlok roof deck for a standard attic (1,000 to 1,500 square feet): $3,800 to $7,500. Steep rooflines, limited access, and existing foam removal all move the number up.
- Garage ceiling spray foam (Demilec open-cell, single-car bay): $700 to $1,800. Two and three-car garages run $1,900 to $3,600.
- Spot repair of failed Demilec foam (pulling loose sections, re-bonding, small re-shoot): $400 to $1,200. This is the fix for the pull-back and delamination problems described above.
The biggest cost variables are whether old foam has to come out, how much access clearance the crew has, and whether we’re correcting somebody else’s bad install. Demilec products themselves are priced competitively among the eight brands we work with, so material cost is rarely the main driver. You’ll get an exact written quote before any work begins. Call (361) 418-9997 and we’ll tell you precisely where your job lands.
Why Austin Homeowners Call Woolsey Insulation Austin for Demilec Work
We’re not the only contractors in Austin who will touch spray foam, but we’re among the few who will hand you a written price, arrive when we say we will, and put the guarantee in writing before the crew sets down a tool. Our techs are background-checked and in uniform on every job, so you know exactly who’s walking into your home. We answer the phone with a real person 24/7, which matters when your attic hits 130 degrees in July and you finally decide to fix it at 9 p.m. on a Wednesday.
We work with eight insulation brands, including Demilec, Icynene, Owens Corning, Johns Manville, Rockwool, and GreenFiber, plus Reflectix for radiant barrier applications. That means when we recommend Demilec for your job, it’s not because Demilec is the only thing on the truck. It’s because Demilec is the right material for your specific attic, roofline, or rim joist condition. If another product fits better, we’ll tell you that too.
Wool was the first insulation. Woolsey keeps the idea in the name. And Glenn Hartley, who runs our Austin operation, learned insulation at Los Angeles Trade-Technical College before working residential and commercial jobs across the Southwest. He’s the one who’ll explain R-value to you without making you feel like you should’ve already known it.
FAQs
Yes, if the work is done by someone who isn’t following Demilec’s application specifications, it can void whatever coverage remains on the original installation. As an independent Demilec service provider, we document everything: substrate temperature, foam depth, moisture readings, before and after thermal images. That documentation gives you a defensible record. We’re not affiliated with or authorized by Demilec, so we’re not operating under their warranty umbrella, but our work comes with our own written 365-day guarantee. Call (361) 418-9997 and we’ll walk you through what your current warranty actually covers.
Repair is almost always cheaper when the foam is properly adhered and the failure is localized. Spot repairs on Demilec installations in Austin typically run $400 to $1,200, while a full remove and re-shoot of the attic can run $5,000 to $9,000 or more. The deciding factors are how much foam has separated, whether moisture got behind it, and whether the original installation was thick enough to meet the R-value you paid for. We’ll tell you honestly if repair is throwing good money after bad.
Most inspections happen within 48 hours, and many repair jobs are done the same week. We don’t schedule work until we’ve seen the problem and you’ve received a written price, so the first visit is always the inspection. If you’ve got a serious issue, like an attic that’s overheating because foam has separated from the roofline, we can often move quickly. Call (361) 418-9997 – a real person answers, even on weekends.
Open-cell Demilec foam, like the Sealection line, is lighter and expands more, making it good for filling cavities where air sealing is the main goal. Closed-cell Demilec foam, like the Heatlok line, is denser and acts as both an air barrier and a moisture barrier, which matters in Austin’s humid summer months. Closed-cell costs more per board foot but often delivers better performance in unconditioned attic spaces where condensation risk is higher. For rim joists in Austin’s pier-and-beam homes, closed-cell is usually the right call.
Yes. We install and service Demilec, Icynene, Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, GreenFiber, and Reflectix. If you have an existing Demilec job that’s failing, we can repair it with Demilec product, and we can also advise you honestly if switching materials for the replacement section makes more sense.
Get Your Demilec Foam Inspected – Free Estimate
If you have Demilec spray foam insulation in Austin and you’re feeling hot spots, unwanted drafts, or just wondering if the last contractor did it right, call (361) 418-9997. We’ll inspect the work, give you a written price for repairs if needed, and if it’s fine, we’ll tell you it’s fine and leave. Estimates are free, and the number we quote is the number you’ll pay. That’s the Kingswell Guarantee, and it’s been how we work since 2002.
Written by Glenn Hartley, Owner, Woolsey Insulation Austin at Woolsey Insulation Austin, serving Austin and nearby areas.