Demilec Spray Foam Insulation in Georgetown: What to Know First
We provide independent Demilec spray foam insulation service in Georgetown, typically completing diagnostic visits same-day or next-day with a written price before any work starts. Most Demilec open-cell and closed-cell jobs in Georgetown homes run between $2,800 and $6,400 depending on cavity depth, square footage, and whether we’re treating an attic roof deck, rim joist, or garage ceiling. We are not affiliated with or authorized by Demilec; we are an independent service provider who sources Demilec materials alongside Owens Corning, Johns Manville, Knauf, and others.
This page is for Georgetown homeowners who have Demilec spray foam in their building envelope and need installation, repair, or replacement. If you’re seeing shrinkage, odor, or thermal performance issues in a Demilec-insulated space, call (254) 970-2136. A live person answers 24/7.
How Demilec Products Fail - and How We Fix Them
- Demilec Sealection 500 open-cell shrinkage in hot roof decks. In Georgetown attics that hit 140°F for months straight, this low-density open-cell can pull away from rafter bays, creating convection channels that defeat the insulation’s purpose. We find it most often in Sun City Georgetown homes built 2017-2020 where the foam was applied too thin during summer installs. Our fix: remove the failed section, recondition the substrate, and reinstall at proper pass thickness with documented R-value verification.
- Demilec Heatlok XT closed-cell odor retention in rim joists. This 2.0-lb density closed-cell can trap amine off-gassing in crawl spaces and basements with limited ventilation, particularly when the A-side and B-side ratios drifted during original application. Homeowners describe it as a fishy or metallic smell that worsens in humid months. We cut out the affected bays, ventilate the cavity for 48 hours, and reinstall with a different Demilec closed-cell formulation or switch to an alternative brand if chemical sensitivity is confirmed.
- Demilec Heatlok HFO High Yield poor adhesion to dusty OSB. The HFO blowing agent in this newer formulation is more environmentally friendly, but we’ve seen delamination on roof decks in Georgetown homes near construction zones where airborne limestone dust settled on sheathing before spray day. We pressure-wash and prime the substrate, then apply a tie-coat before the full foam pass. Wes Okafor’s crew documents the surface prep with photos; it’s in your job record.
- Demilec Sealection AgriBalance agricultural-grade misuse in residential walls. This lower-cost variant occasionally shows up in Georgetown flip properties where a general contractor substituted it for residential-grade foam. It lacks the fire-retardant package required by IRC Section N1101.3 and can crumble when disturbed. We remove it, document the code violation for your records, and reinstall with proper residential closed-cell or open-cell per the written scope.
- Demilec spray foam compromised by roof leaks in San Gabriel River corridor homes. The humidity gradient from the river valley accelerates hydrolysis in water-saturated foam, breaking down cell structures from the inside. We thermal-scan to find the leak source, remove saturated foam in layers to prevent trapping moisture, repair the envelope breach, and reinstall only after the cavity reads below 18% moisture content on our meter. “Seal the holes first. Then we talk about R-value.”
Our Demilec Spray Foam Insulation Process

- 1
Call and scheduling. A live person answers. We book a diagnostic window, text you when the technician is en route, and send a named technician - not a rotating subcontractor.
- 2
On-site diagnostic with documentation. We inspect the Demilec installation, run a thermal imaging scan, and if applicable, perform a blower-door test - a pressurization reading that shows, in one number, how much air your building envelope is losing. Photos of every cavity are taken before anyone touches a tool.
- 3
Written price and scope. Under Haven Standard Clause 1: flat price, written scope, written warranty before anyone lifts a tool. We explain whether OEM Demilec material or a quality alternative from Icynene or another named supplier better serves your specific failure mode.
- 4
Prep and air sealing. Every penetration, top plate gap, and can light surround is foam-sealed before new insulation goes in. We do not blow product over an unsealed attic floor. Period.
- 5
Installation and real-time verification. Foam is applied in measured passes, with thickness checks every 100 square feet. On applicable jobs, we run a second blower-door test and provide before-and-after readings - the 4,200 CFM50 dropping to 2,100 kind of number you can verify yourself.
- 6
Cleanup and documented record. You receive a written completion summary, thermal images, blower-door results if measured, and our 365-Day Done Right Promise in writing. The crew leaves with the jobsite cleaner than they found it.
Before
AfterWhat Demilec Spray Foam Insulation Costs in Georgetown
| Job Type | Typical Range | What Moves the Price |
|---|---|---|
| Open-cell attic roof deck (Demilec Sealection 500 or equivalent) | $2,800 - $4,200 | Cavity depth, accessibility, whether old foam must be removed first |
| Closed-cell rim joist (Demilec Heatlok XT or HFO) | $1,800 - $3,200 | Linear feet of foundation perimeter, crawl space headroom, odor remediation needed |
| Garage ceiling (open or closed cell) | $2,200 - $3,800 | Attached vs. detached, ductwork present, fire-rated separation requirements |
| Full envelope replacement after failure | $4,800 - $6,400 | Extent of removal, substrate repair, multi-zone application |
These ranges reflect what we see in Georgetown homes from the historic district to new builds in Wolf Ranch. Every job gets a written price before work starts - no exceptions. Bring us a competing written estimate; we offer a Free Second Opinion and will read it with you line by line. Call (254) 970-2136 for your exact quote; estimates are free.
Why Georgetown Homeowners Call Topside Attic Insulation Georgetown for Demilec Work

We’ve sealed and insulated 9,000+ homes since 2016, and the ones that stick with us are the homeowners who read three-star reviews as carefully as five-star ones and want the numbers, not the narrative. Our technicians are background-checked, uniformed, and trained on Demilec’s specific formulations - not generic spray foam training that treats all brands interchangeably. We carry Reflectix and other multi-brand alternatives so we’re never locked into a single supplier when a different material solves your problem better. The 365-Day Done Right Promise applies to every completed job, backed by a written scope and warranty delivered before anyone starts. Calls are answered by a live person 24/7. No voicemail loops. No callback windows measured in business days.
FAQs
Demilec’s product warranty covers material defects regardless of who installs it, but installation workmanship is not covered by Demilec - that’s why we provide our own 365-Day Done Right Promise in writing. For warranty claims on defective material, we document the batch numbers and installation conditions so you have what you need to file directly with Demilec. Call (254) 970-2136 and we’ll walk you through what’s covered by whom; estimates are free.
We stock common Demilec formulations in our Georgetown warehouse and can typically source less common variants within 3-5 business days through our supplier network. For urgent cases, we can substitute an equivalent Icynene or Johns Manville product with matching thermal performance if you approve the change in writing. Same-day diagnostics are usually available; call (254) 970-2136 to check today’s schedule.
Spot repair is cheaper when the failure is isolated to less than 20% of the insulated area and the surrounding foam tests sound. Full replacement becomes the better value when you have multiple failure zones, code-compliance issues, or the original installation used an agricultural-grade product like Sealection AgriBalance in a residential application. We give you both numbers in writing and let the math decide. Call (254) 970-2136 for a free evaluation.
We can match the thermal performance (R-value per inch) and density class, but exact color and surface texture match is not guaranteed - Demilec’s tint varies by batch and age. For visible areas like garage ceilings, we discuss this during the written scope review so there are no surprises at final walkthrough. Call (254) 970-2136 to schedule; estimates are free.
We do not classify insulation failures as true emergencies - they don’t flood your kitchen or spark fires - but we do answer calls live 24/7 and prioritize diagnostics for active water intrusion or severe odor cases within 24 hours. For standard performance concerns, we typically schedule within 2-3 business days. Call (254) 970-2136 and a live person will slot you appropriately.
Written by Wes Okafor, Owner, Topside Attic Insulation Georgetown at Topside Attic Insulation Georgetown, serving Georgetown and nearby areas.