Demilec Blown In Insulation in Dallas: What to Know First
We install and service Demilec blown in insulation in Dallas, and we do it the way we do everything else: a written price before any work starts, a tech whose name and photo you get before they ring the bell, and a 365-day guarantee in writing. Most Demilec blown in jobs in Dallas take one day, sometimes two if we’re pulling out failed material from an older install. Independent Demilec service provider here – we’re not owned by or authorized by Demilec, which means we work for you, not a manufacturer’s warranty department. This page is for Dallas homeowners who already have Demilec in their attic (or are considering it) and want straight answers about how it holds up, what it costs to fix, and why it fails.
Call (361) 607-0906 and you’ll get a live person. Always. Not a voicemail loop at 2 a.m. when the attic’s sweating.
Key Takeaways
- Demilec blown in insulation in Dallas typically costs $1.60 to $3.10 per square foot installed, depending on depth and whether old material has to come out first.
- Most Demilec failures we see are install-related, not product-related – heat-welded seams, voids, or wrong density.
- We send the tech’s name and photo before the visit. If anyone else shows up, the visit is free.
- Every Demilec job carries our 365-Day Done Right Promise in writing, covering labor and materials.
How Demilec Products Fail – and How We Fix Them
Demilec makes good foam. We’ve pulled enough of it out of Dallas attics to know where it goes wrong, and it’s usually not the chemistry. Here’s what we actually see:
- Heatlok HFO Pro shrinkage under the roofline. In Dallas, attic temps routinely push 140°F in August. We’ve walked into attics in Lakewood and Casa View where Heatlok HFO Pro has pulled back from the decking by a quarter inch or more – enough to let conditioned air leak straight through. The cause is almost always the same: applied too thick in one pass, or the substrate was too hot during the install. We cut out the failed sections, check the substrate temp, and reapply in proper lifts. That’s the fix, not slapping more foam on top.
- Sealection 500 overspray creating false depth. Sealection 500 is a half-pound open-cell foam. It expands a lot, and some installers use that expansion to cheat depth. The homeowner sees a thick coat, but the density is wrong, so R-value is way under spec. We measure existing depth with a probe, not a ruler, because open-cell looks fluffy but compresses. If the R-value’s short, we bring it up with blown in insulation on top – fiberglass or cellulose over the foam layer, after confirming the foam’s thermal performance.
- APX foam lifting off the roof deck in older homes near White Rock. Older frame homes near the lake move. We see APX (Demilec’s closed-cell line) delaminate from decking because the joists and rafters shifted after install. Closed-cell foam is rigid – it doesn’t flex with the house. The tell is a popping or cracking sound on windy days. The fix for blown in work is to seal the delaminated seam with a flexible sealant, then blow insulation over the cavity to stop convection. We don’t glue the foam back down; it’ll just release again.
- Aggregate with voids behind can lights and junction boxes. This isn’t Demilec-specific, but we’ve seen it enough on Demilec installs to flag it. Installers spray around fixtures and leave a donut of dead air around every light. In a Dallas summer, those voids leak like a screen door. We pull the trim, check the clearance, and pack the gap properly – respecting the fixture’s thermal rating, which a lot of crews ignore.
- Moisture trapping when Demilec is sprayed over damp decking. Dallas humidity in April and May means decking that looks dry but isn’t. Closed-cell foam applied to damp wood traps that moisture, and two years later the decking rots from underneath. We check moisture content with a meter before any foam work or before blowing insulation over existing foam. If the decking reads over 19%, we stop and tell you – because the right fix is ventilation first, not more insulation.
Our Demilec Blown In Insulation Process
Here’s how a Demilec blown in job goes with us, from the first call to the final walkthrough:
- 1
You call (361) 607-0906. A live person answers. We schedule a time, and before the visit we send the tech’s name and photo. That’s the Threshold Standard – every visit, every time.
- 2
The tech arrives in a marked uniform with a photo ID badge. They check the photo against the one we sent. If it doesn’t match, the visit is free and we make it right. That’s not marketing; it’s a written policy.
- 3
Diagnostics on the existing Demilec. We probe existing depth, check density, look for shrinkage along the roofline, check moisture content in the decking, and identify where the heat’s actually leaving. We write down what we find.
- 4
You get a written price before any work starts. That price covers everything – labor, materials, the aftermarket or OEM product we’ll use, cleanup. No post-job surprise. Ever.
- 5
We blow the insulation. Whether it’s fiberglass, cellulose, or a hybrid approach over existing Demilec foam, we hit the target R-value for Dallas (R-38 minimum in most attics) and check coverage with a depth card as we go.
- 6
Test and walk through. We check for gaps around fixtures, verify depth at multiple points, and leave the job clean. Then the 365-Day Done Right Promise kicks in – in writing, covering labor and materials, with a free second visit if anything fails.
What Demilec Blown In Insulation Costs in Dallas
Straight numbers, because you came to this page for a price, not a sales pitch. Blown in insulation over or around Demilec foam in Dallas runs about this:
| Scenario | Typical Dallas Price Range |
|---|---|
| Blown fiberglass over existing Demilec open-cell foam (attic floor, 1,000 sq ft) | $1,600 – $2,400 |
| Blown cellulose over existing Demilec foam (attic floor, 1,000 sq ft) | $1,450 – $2,100 |
| Removing failed Demilec and replacing with blown in insulation (1,000 sq ft) | $3,100 – $5,200 |
| Sealing Demilec shrinkage gaps, then topping with blown in insulation | $900 – $1,800 |
What moves the price: how much failed Demilec has to come out first, attic access (older Dallas bungalows with pull-down stairs aren’t the same as a walk-up attic in North Dallas), and the target R-value. Every job gets a written price before work starts. Call (361) 607-0906 for an exact quote – estimates are free, and we don’t pressure you.
Why Dallas Homeowners Call Aspen Attic Insulation Dallas for Demilec Work
Garrett Sloane grew up learning the trade on the West Coast and brought it to Dallas with one rule: quote straight, show up on time, and don’t leave until the job’s tight. He’s been running crews in Dallas long enough to know which attics near White Rock leak like a screen door and which North Dallas subdivisions were insulated by crews cutting corners. Our techs know Demilec’s lines – Heatlok, Sealection, APX – but we’re also not married to one brand. We keep eight material brands in the mix, including Reflectix for radiant barrier work, because the right product depends on the attic, not the supplier’s inventory. Most important: we’re background-checked, identity-verified, and we send your tech’s name and photo before anyone shows up. If your attic is working against you, your AC never had a chance.
FAQs
Demilec’s warranty covers their foam products, but rarely covers the labor to access, pull, and reinstall failed material – and as an independent service provider, we don’t process Demilec warranty claims for you. What we do offer is our 365-Day Done Right Promise, in writing, covering labor and materials on every job we perform. If something fails within a year, we come back free. Call (361) 607-0906 if you want to know whether your existing Demilec issue is worth a warranty call.
Yes, in most Dallas attics you can blow fiberglass or cellulose over existing Demilec open-cell foam to reach target R-value, provided the foam is dry and intact. We check density and moisture before we blow anything. If the Demilec has shrunk or delaminated, it needs addressing first – otherwise you’re just covering a leak.
Most Demilec repairs and blown in retrofits in Dallas are done in one day. If we’re pulling significant failed foam or working in a tight attic, it may run into a second day, and you’ll know that before we start. We don’t stack jobs on top of yours – when we’re on your attic, we’re on it until it’s done.
If the Demilec is structurally sound and just short on depth, topping it with blown in insulation is the cheaper call – typically $1,450 to $2,400 in Dallas. If the foam has failed (shrinkage, delamination, moisture trapping), repairing and then topping is the more expensive route, but blowing over failed foam is throwing money away. We’ll tell you which situation you’re in before you spend a dollar.
We work with eight material brands, including Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, GreenFiber, and Reflectix. Demilec is one of the brands we service, not the only one. That matters because the right product for your attic isn’t always the one already in it.
Get a Straight Answer on Your Demilec Attic
If you’re in Dallas and something in your attic isn’t holding heat or cold the way it should, call us. You’ll talk to a person, not a phone tree. We’ll send a tech whose name and photo you already have, give you a written price before any work starts, and stand behind the job for 365 days in writing. Call (361) 607-0906 for a free estimate.
Written by Garrett Sloane, Owner, Aspen Attic Insulation Dallas at Aspen Attic Insulation Dallas, serving Dallas and nearby areas.