Demilec Spray Foam Insulation in Fort Worth: What to Know First
Demilec spray foam insulation in Fort Worth typically runs $1.80 to $4.50 per board foot installed, with most whole-attic open-cell jobs landing between $3,200 and $7,800 and closed-cell rim joist packages starting around $1,400. We’re an independent Demilec service provider, which means we work on Heatlok HFO, Sealection 500, and other Demilec lines without being tied to manufacturer pricing or rigid warranty-claim channels. Most Demilec spray foam jobs in Fort Worth we schedule within 3 to 5 business days, and every estimate is free. If you’ve got a Demilec foam situation that needs eyes on it, call (817) 730-5474 and we’ll get you a written price before any work starts.
This page is for Fort Worth homeowners, builders, and property managers who already have Demilec spray foam, or who are comparing Demilec against other open-cell and closed-cell options. We’ll walk through how Demilec products age in North Texas attics, what causes failures, what repair actually costs, and why our approach to Demilec work is different from the next contractor’s.
Key Takeaways
- Demilec open-cell (Sealection 500, Heatlok HFO Pro) is common in Fort Worth attics and roof decks; closed-cell (Heatlok HFO High-Lift) shows up on rim joists and metal buildings.
- Most Demilec failures we see stem from installation conditions, not the chemical itself: off-ratio passes, substrate moisture, or thermal bypasses around the foam.
- We quote Demilec work by the board foot with a written price up front, and we stand behind it with the 365-Day Done Right Promise and a free second visit if anything fails.
- As an independent shop, we’re not locked into Demilec-only fixes; if a Reflectix radiant barrier or another material makes more sense for your roof assembly, we’ll tell you that directly.
How Demilec Products Fail – and How We Fix Them
Demilec makes solid foam chemistry. Most of what goes wrong on Demilec jobs in Fort Worth isn’t a product defect; it’s what happened on install day, or what the attic has done to the foam since. Here are the five most common Demilec-specific issues we walk into around Fort Worth:
- Sealection 500 shrinkage at the roof deck. The open-cell Demilec line that goes into a lot of Fort Worth attic rooflines can pull back from rafters over time if it was applied too thick in one pass. The foam overheats during cure, loses adhesion at the edges, and you get air gaps that let 140-degree attic air ride straight through. We cut out the separated sections and re-foam in proper lifts, which is what Demilec’s own application specs call for.
- Heatlok HFO Pro off-ratio passes. This is the closed-cell workhorse, but it’s unforgiving with temperature. When a crew shoots it on a 45-degree February morning or a 100-degree July afternoon without adjusting drum temps, you get brittle foam, poor cell structure, and low R-value per inch. We check the foam density and adhesion with a core sample before we ever recommend adding more foam. If the existing layer is off-ratio, adding new foam on top won’t fix it.
- Heatlok HFO High-Lift on rim joists with moisture trapped behind it. Closed-cell foam is a vapor barrier, which is exactly what you want on a Fort Worth rim joist in summer. But if there was a foundation seep or a leaking sill plate before the foam went in, that moisture is now trapped and quietly rotting the band board. We pull a small test plug first, check the wood with a moisture meter, and only then decide whether to re-foam or address bulk water first.
- Sealection Agribalance in unconditioned garages. This Demilec open-cell line with the bio-based content sees a lot of use on garage ceilings, particularly in newer Fort Worth builds where bonus rooms sit above garages. The issue is that open-cell absorbs moisture from humid garage air, and over three or four North Texas summers, the foam near the ceiling joists can sag or lose its loft. We see it regularly in neighborhoods like Wedgwood and Overton Park.
- Poor flashing integration around roof penetrations. On homes with Demilec foam at the roof deck, the foam often stops short around plumbing vents, attic access hatches, and can lights. The foam itself is fine; the air sealing around it isn’t. This is the most common reason Fort Worth homeowners call us thinking their Demilec has “failed” when what they actually have is a thermal bypass we can seal in under an hour.
Our Demilec Spray Foam Insulation Process
- 1
You call; a person answers. You reach us at (817) 730-5474, day or night. We ask what you’re seeing and schedule a walkthrough at a live, trackable time. No four-hour windows.
- 2
We put eyes and hands on the foam. Chase Whitaker or one of our senior techs goes into the attic, the rim joist, or the roofline and documents what’s there: foam type, thickness, adhesion, moisture levels, and any signs of shrinkage or separation.
- 3
You get a written itemized price. Before anything gets sprayed, you know the board footage, the material, and the dollar line items. Board-foot pricing is the only honest way to quote spray foam, and we don’t play the square-foot shell game.
- 4
The repair or install. We prep the substrate, run the Demilec rig within the manufacturer’s temperature and humidity window, and spray in proper lifts. For partial repairs, we cut clean edges and tie in new foam to old with continuity you can feel.
- 5
Before-and-after documentation. Photos of the foam, the depths, and the finished work go to your phone. Your invoice arrives as a link you can pay online.
- 6
The write-up and the warranty. Every Demilec job gets a written 365-Day Done Right Promise. If anything about the workmanship fails inside a year, we’re back and the second visit is free.
What Demilec Spray Foam Insulation Costs in Fort Worth
| Demilec Scenario | Typical Fort Worth Price Range |
|---|---|
| Partial roof-deck repair on Sealection 500 (100 – 200 sq ft) | $850 – $1,600 |
| Full attic roofline, open-cell Sealection 500 (~1,500 sq ft, 5.5 inches) | $4,200 – $6,900 |
| Rim joist package, closed-cell Heatlok HFO (~120 – 180 linear ft) | $1,400 – $2,600 |
| Garage ceiling, open-cell (~400 – 500 sq ft) | $1,200 – $2,100 |
| Spray foam roof deck on new build or re-roof (~2,000 sq ft, closed-cell) | $9,000 – $14,500 |
Price moves on four things: board footage, open-cell versus closed-cell, access difficulty, and whether we’re removing failed foam first. Fort Worth’s older ranch homes, especially around the TCU area, often have tight attic access that adds labor hours but not material cost. Newer builds in the Alliance corridor are usually straightforward. The estimate we hand you is free and the number on that sheet is the number you pay. No revised pricing at the truck.
Why Fort Worth Homeowners Call Laurel Attic Insulation Fort Worth for Demilec Work
Demilec is one of eight brands we install and service, but we don’t push it where it doesn’t fit. We’re also a Reflectix dealer, which matters because some Fort Worth roof assemblies in the hot months need a radiant barrier in the air gap above the insulation, not just more foam below it. Most contractors only sell one or the other. We sell the right assembly for the house, and we document the reasoning with photos and measurements so you can see the issue yourself. Good insulation shouldn’t be a mystery; let us show you the numbers.
Every Demilec spray foam job in Fort Worth carries the full Relay Visibility Guarantee: live arrival tracking, before-and-after photo proof, a written price before work starts, and the 365-Day Done Right Promise on workmanship. Our techs are background-checked, uniformed, and trained on the specific realities of North Texas attic work: 130-degree summer deck temperatures, February freeze swings, and forty-year-old framing that needs a lighter touch than a new build. We’ve been doing this since 2003 as part of the Relay Home Co. family, and we answer the phone around the clock at (817) 730-5474.
FAQs
Demilec’s material warranty applies to the manufactured foam chemistry; workmanship issues from the original install are generally not covered by the manufacturer, which is where our written 365-Day Done Right Promise comes in. If we touch a Demilec job and anything about our workmanship fails inside a year, the second visit is free, no argument. Call (817) 730-5474 and we’ll walk through what your specific warranty does and doesn’t cover.
For a failed foam section causing a hot room or a major air leak, we can often schedule a diagnostic visit within 24 to 48 hours in Fort Worth, and most Demilec repairs are completed within 3 to 5 business days of the estimate. We carry core-sample tools and moisture meters on the truck, so diagnostic visits are almost always the same trip as the solution. Call (817) 730-5474 for current availability.
For localized shrinkage, separation, or bypass sealing, repair is almost always cheaper: $850 to $1,600 for typical sections versus thousands more for a full tear-out and re-spray. Replacement only makes sense when more than about 30 percent of the foam has lost adhesion or its cell structure is shot, and we’ll show you the core sample before we recommend the bigger spend.
Yes. Because we install from eight manufacturer brands including Demilec, Reflectix, and Icynene, we’re not tied to patching Demilec with Demilec if another open-cell or closed-cell product does the job better for your specific attic, rim joist, or roof deck. We’ll spell out the trade-offs in the written estimate so you decide with real numbers, not a sales pitch.
We do, including full roof deck applications of Heatlok HFO Pro and High-Lift for builders and homeowners running new construction across Fort Worth and the northern suburbs. New-build foam walks a different permitting and inspection schedule than retrofit work, and we handle that sequence for you. Call (817) 730-5474 to put a Demilec spray foam quote on your plans.
If your Demilec foam isn’t doing what it should, or you’re trying to decide between Demilec and another product for your Fort Worth home, call (817) 730-5474. We’ll give you a straight answer, a written price, and a time we’ll actually show up. Estimates are free, and you’ll talk to a person, not a voicemail tree.
Written by Chase Whitaker, Owner, Laurel Attic Insulation Fort Worth at Laurel Attic Insulation Fort Worth, serving Fort Worth and nearby areas.