Demilec Home Energy Audit in Seguin: What to Know First
We provide independent Demilec home energy audit in Seguin, typically scheduling within 24-48 hours and completing most audits same-day. Our written price lands before any work starts - no exceptions - and you’ll walk away with printed blower-door readings, thermal images, and a scope document that names exactly what we found. This page is for Demilec owners in Seguin and the Hill Country edge who want to know why their spray foam or air barrier isn’t performing the way the brochure promised, and what the numbers actually say. Call (830) 549-6646 to book or to get a free second opinion on another contractor’s written estimate.
How Demilec Products Fail - and How We Fix Them
- Demilec SEALECTION 500 open-cell foam shrinkage in Seguin’s heat cycles. The Hill Country’s 40-degree daily temperature swings in spring and fall stress open-cell foam that was applied too thin or off-ratio. We see this in attics near Guadalupe Regional Medical Center where 1960s-1980s roof decks flex more than modern trusses. Our fix: thermal imaging to map the shrinkage gaps, then targeted removal and reapplication with documented depth gauges, not eyeball estimates.
- Demilec HEATLOK Soya HFO closed-cell delamination from OSB sheathing. The bio-based content in this series can outgas moisture if the substrate wasn’t properly dried before application, especially after Seguin’s humid summer storms. We find this where roof leaks went unaddressed before foam went up. Our fix: moisture-meter readings at multiple sheath points, selective foam removal, drying verification, then reapplication with substrate conditioning noted on your written scope.
- Demilec HEATLOK XT high-pressure failures at rim joists and band boards. The higher density that gives XT its R-value per inch also makes it less forgiving of dirty or cold substrates. In Segin crawl spaces with seasonal groundwater, we’ve pulled failed XT off band joists that were never cleaned or warmed. Our fix: full surface prep protocol - wire brush, solvent wipe if needed, substrate temp verification - before any foam touches steel or wood.
- Demilec SEALECTION AGRI-THANE agricultural-grade misapplication in residential envelopes. This lower-density formula sometimes gets substituted by price-driven crews who don’t understand the permeability difference. We find it in Seguin farm-to-ranch conversions where the original spec got value-engineered down. Our fix: core sampling to verify density and closed-cell content, then written recommendation for replacement or supplemental air sealing based on actual performance, not label claims.
- Demilec spray foam air barrier discontinuity at electrical and plumbing penetrations. Every Demilec spec sheet calls for “complete envelope continuity,” but in practice we see 30-40% of attics where the foam stopped at the top plate and never sealed the wire holes. Our fix: blower-door directed air sealing with theatrical smoke to find every path, then targeted foam or sealant application with post-test verification. The report goes home with you - the numbers do the talking.
Our Demilec Home Energy Audit Process

- 1
Call and scope. A live person answers. We ask the Demilec product line if you know it, the home’s age, and what’s driving the call - high bills, hot rooms, musty smells, or a previous contractor’s report.
- 2
On-site blower-door test. We pressurize the house to 50 Pascals and record CFM50 and ACH50 baseline numbers. In Seguin’s older stock near downtown, we regularly see 3,500-5,000 CFM50 in homes that should read under 2,500.
- 3
Thermal imaging and targeted inspection. We map Demilec foam continuity, check for shrinkage or delamination patterns specific to the installed series, and photograph every anomaly with location tags.
- 4
Written findings and price. Before any remediation discussion, you get a document with the blower-door numbers, thermal images, and a flat price for each option - repair, replace, or supplement. Haven Standard Clause 1: no work starts without your signature on a written scope.
- 5
Remediation and post-test. We execute only what you approved, then run the blower-door again. The printed report shows before-and-after ACH50 so you can verify the change. Documented Photo Record included. 365-Day Done Right Promise applies.
Before
AfterWhat Demilec Home Energy Audit Costs in Seguin
Most Demilec home energy audits in Seguin run $275-$425 for a single-family home under 3,000 square feet. That covers the blower-door test, full thermal imaging survey, insulation and air-barrier inspection, and the written report with photos.
If we find duct leakage significant enough to test, a duct blaster add-on runs $175-$250. Remediation work - targeted air sealing, selective foam removal and reapplication, or full envelope correction - typically ranges $1,800-$4,500 depending on attic square footage, accessibility, and whether we’re working around existing Demilec that can stay versus foam that has to come out.
Homes near the Guadalupe River floodplain sometimes need crawl space vapor barrier work before air sealing makes sense; that’s priced separately and noted in writing if we find elevated substrate moisture. Call (830) 549-6646 for an exact quote - estimates are free, and we read competing written estimates with you at no charge.
Why Seguin Homeowners Call Topside Attic Insulation Seguin for Demilec Work

We’re independently owned and operated under The Haven Standard since 2016 - not a franchise, not a brand affiliate. Wes Okafor learned thermal envelope science at Triton College in River Grove, IL, and he’s run blower-door tests before and after every applicable job for over two decades. That means Demilec owners in Seguin get a technician who can read a foam spec sheet against what was actually installed, and who will hand you printed numbers instead of a handshake promise.
We also service Reflectix and other major brands, so if your audit reveals that Demilec isn’t the right product for your particular assembly - say, a vented attic where radiant barrier outperforms foam - we’ll say so in writing. Live person answers the phone 24/7. Background-checked, uniformed technicians. Written price before any work starts, always.
FAQs
No - Demilec’s material warranty covers product defect, not installation workmanship, and it isn’t conditional on using a factory-authorized contractor. What voids coverage is improper application, which is exactly what our audit documents. If we find an install issue, we photograph it, note the code or spec deviation, and give you a written report you can use with any remedy path you choose. Call (830) 549-6646 to schedule.
We source Demilec products through standard distribution channels and can match your existing series - SEALECTION 500, HEATLOK Soya HFO, HEATLOK XT, or AGRI-THANE - when replacement is the right call. We also quote quality aftermarket alternatives where the building science supports it, and we explain the trade-offs in writing before you decide. No proprietary lock-in. Call (830) 549-6646 for specifics on your job.
Replacement is indicated when core samples show density below manufacturer spec, delamination exceeds 20% of the surface area, or moisture content in the substrate reads above 19% with no drying path. Repair - targeted removal and reapplication - works for isolated shrinkage, missed penetrations, or thin spots. We give you both prices in writing and explain which path the blower-door numbers support. Call (830) 549-6646 for an audit.
We typically schedule within 24-48 hours, and most audits take 2.5-4 hours on site. Same-day scheduling happens when our Seguin crew is already in your area - call (830) 549-6646 to check today’s availability. Your written report with blower-door numbers and thermal images follows within 24 hours.
Access to attic and crawl space, two years of utility bills if you want us to correlate consumption with envelope performance, and any Demilec installation paperwork you have - product data sheets, contractor invoices, or warranty documents. We bring our own equipment: blower door, thermal camera, moisture meters, and core sampling tools. Call (830) 549-6646 to book.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Seguin at Topside Attic Insulation Seguin, serving Seguin and nearby areas.