Demilec Wall Insulation Nationwide

Demilec Wall Insulation in Lancaster: What to Know First

We provide independent Demilec wall insulation service in Lancaster, typically scheduling within 48 hours and completing most jobs in a single day. Most Demilec injection foam and drill-and-fill wall jobs in a Lancaster home this size run between $2,800 and $5,400, with a written price before any work starts. This page is for homeowners who already have Demilec product in their walls and need to address settling, moisture intrusion, or thermal performance loss, or who are comparing Demilec against other materials for a new wall insulation project. Call (661) 526-2890 for a free estimate and a written scope.

Call (661) 526-2890

How Demilec Products Fail - and How We Fix Them

• Heatlok HFO Pro series shrinkage in exterior walls. The HFO blowing agent can contract 3-5% in the first two years, especially when wall cavities experience the 40-degree daily temperature swings common in Lancaster’s high desert climate. We diagnose this with thermal imaging to locate void channels, then perform selective drill-and-fill reinjection using matched-density Demilec material, not generic open-cell foam that won’t bond to the original substrate.
• Heatlok XT moisture retention in south-facing walls. The XT series’ higher density traps vapor when the exterior sheathing temperature drops below the dew point during Lancaster’s cold January nights. We don’t just add more foam; we first pull moisture readings at multiple stud bays, then address the air-leak source at top plates and electrical penetrations before any reinjection. Seal the gaps first. Then insulate. The R-value you paid for is only as good as the air barrier behind it.
• Demilec open-cell sag in interior soundproofing applications. Open-cell Demilec (typically 0.5 lb/ft³) can pull away from top plates in walls taller than 9 feet, which is standard in newer Lancaster tract homes near Avenue K and the BLVD. We verify gap depth with a borescope, then reattach with compatible adhesive foam rather than simply blowing more material that will sag again.
• SEALECTION Agribalance degradation around plumbing stacks. The bio-based content in Agribalance can hydrolyze when chronically damp from pipe condensation, common in Lancaster homes with slab-on-grade construction and no basement air circulation. We remove the degraded section, seal the pipe penetration with closed-cell Demilec for moisture resistance, then reinject the cavity.
• Demilec retrofit incompatibility with existing fiberglass. When previous owners stuffed batts into walls later treated with Demilec injection foam, the hybrid creates convection loops that read as “insulated” on casual inspection but perform at R-3 or lower. We use a fiber-optic camera to confirm cavity contents, then extract the fiberglass mechanically before proper Demilec injection.

Our Demilec Wall Insulation Process

1. 1
   Call and scope. A live person answers 24/7. We schedule a site visit, and Wes Okafor or a lead technician arrives with a thermal camera, moisture meter, and borescope.
2. 2
   Pre-install air-leak audit. We pressurize the home with a blower-door test - a pressurization reading that shows, in one number, how much air the building envelope is losing. Top plates, can lights, and electrical penetrations are sealed before any insulation touches the wall.
3. 3
   Diagnostics and parts decision. We identify the Demilec series in your walls, assess failure mode, and specify OEM Demilec material or verified-compatible aftermarket based on warranty status and cavity condition. We explain the choice in writing.
4. 4
   Injection or drill-and-fill execution. For exterior walls, we drill 5/8-inch holes at stud-bay intervals, inject at controlled pressure to avoid bowing drywall, and verify fill with thermal imaging in real time.
5. 5
   Post-work verification. We run a second blower-door test, provide before-and-after CFM50 readings, and deliver a Documented Photo Record showing cavity fill, material depth, and any structural observations.
6. 6
   Written closeout. You receive the written scope, warranty documentation, and the 365-Day Done Right Promise before we leave. No exceptions.

What Demilec Wall Insulation Costs in Lancaster

What moves the price: wall cavity depth (2×4 vs. 2×6), existing material removal requirements, accessibility (stucco vs. siding), and whether the home needs pre-install air sealing. We also service Reflectix and other brands, so if Demilec isn’t the right material for your application, we’ll say so. Call (661) 526-2890 for an exact quote - estimates are free, and the written price comes before any work starts.

Why Lancaster Homeowners Call Topside Attic Insulation Lancaster for Demilec Work

We’ve sealed and insulated 9,000+ homes since 2016, every one with a written price before work started and a documented record when the crew left. Our technicians are background-checked and uniformed; you get a named technician and a text when they’re on the way. On Demilec jobs specifically, we carry the full product line knowledge to distinguish between a series-specific failure and a broader envelope problem, so you don’t pay for wall injection when the real issue is unsealed top plates dumping attic air into your stud bays. The 365-Day Done Right Promise applies to all completed work. If it’s not done right, we make it right.

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