Why San Marcos Homeowners Choose Reflectix Insulation
We provide Reflectix service in San Marcos, TX, specializing in the installation errors and material failures that actually show up in local attics. Our crews work with Reflectix radiant barrier products as part of a complete attic system - air-sealed first, then insulated, with before-and-after blower-door numbers on every job so you can verify the result in a single figure. We’re not affiliated with or authorized by Reflectix; we service their products because we know how they perform in the specific heat, humidity, and housing stock of the San Marcos area. Call (737) 337-8049 for a written price before any work starts.
Why Trust Topside Attic Insulation San Marcos for Your Reflectix Insulation?
Wes Okafor, who leads our crew, trained in building science and weatherization at Dawson Technical Institute before spending two decades diagnosing why attics fail - not just filling them. He grew up on Chicago’s South Side and has served the San Marcos area for years, including the older slab-on-grade homes near the Texas State University corridor where air sealing at the top plate is routinely skipped and always felt in the utility bill.
We know Reflectix products specifically because we’ve removed so many failed installations. The R-value tells you how slow heat moves through the material - the blower-door number tells you whether any of that matters. We run that test before and after every job, then hand you a single printed page with the before-and-after air-changes-per-hour figure. No claim, just the number.
Our technicians are background-checked and uniformed, and a live person answers calls 24/7. Every job begins with a written scope, a written price, and a written warranty - Haven Standard Clause 1 - and closes with a Documented Photo Record. On applicable jobs, you also get those blower-door readings.
Common Reflectix Insulation Problems We Fix in San Marcos
- Foil delamination and bubbling from flat stapling. Reflectix Double Reflective Insulation Roll - the foil/bubble/foil product - requires an air gap of at least 3/4 inch to function as a radiant barrier. When it’s stapled directly to hot roof sheathing, as we see constantly in San Marcos attics, the trapped heat causes the foil to blister and separate from the bubble core. The product becomes a heat sink instead of a heat reflector. We remove the damaged material, install proper baffles at the soffits to create airflow, and rehang the barrier with the gap it was designed for.
- Staple-point tearing and wind-lifted edges. Reflectix radiant barrier perforated foil installed over standard 24-inch truss spacing without support mesh or furring strips tears at every staple point within a few seasons. San Marcos sits at the Balcones Escarpment where Gulf humidity meets Hill Country dryness, and that thermal cycling creates expansion and contraction that pulls staples through the foil. We install with embedded wire product or add support strapping so the material stays put.
- Dust and soot accumulation killing low-emissivity performance. The reflective surface of Reflectix radiant barrier needs to stay clean to reject radiant heat. In San Marcos attics with nearby construction, agricultural activity, or loose-fill insulation debris, that surface collects dust in 18-24 months. Once the emissivity drops, you’re left with a shiny vapor barrier that does little for heat gain. We assess whether cleaning is practical or replacement makes more sense, and we address the source - often inadequate air sealing at the attic floor - so the problem doesn’t repeat.
- Tape-joint failure from wrong tape. Standard duct tape or generic foil tape on Reflectix seams fails within one or two summers on a San Marcos roof deck. The adhesive degrades, gaps open, and convective air movement bypasses the barrier entirely. We use Reflectix Heavy-Duty Reflective Foil Tape or equivalent high-temperature foil tape rated for the surface temperatures these attics reach. It’s a small detail that determines whether the whole system works.
- Reflectix installed as a stand-alone solution in under-insulated attics. We see this in the 1970s-1990s rental properties concentrated near the Texas State campus - original fiberglass batts compressed or disturbed by decades of HVAC service, with a layer of Reflectix thrown over the top as a quick fix. Radiant barrier does not replace conductive insulation. It works with it. We evaluate whether the existing blow-in or batt can be topped up or needs full replacement, then integrate the Reflectix properly into a complete assembly.
Before
AfterReflectix Parts & Our Repair-vs-Replace Approach
We stock authentic Reflectix foil and foil tape locally for fast turnaround on repairs, because aftermarket foil tapes rarely hold on Central Texas roof-deck temperatures that routinely exceed 140°F in summer attics. For full installations, we source Reflectix Double Reflective Insulation Roll, the embedded wire variant for structural support, and perforated radiant barrier foil for attic floor applications where moisture management matters.
Our repair-vs-replace decision is straightforward. If the radiant barrier is intact but poorly installed - wrong tape, no air gap, inadequate support - we fix the installation. If the foil is delaminated, torn beyond patch repair, or so dust-coated that cleaning won’t restore emissivity, we replace it and tell you exactly why. If your attic needs more than radiant barrier work - Attic Insulation services like top-up insulation, air sealing at top plates and can lights, baffles at soffits - we put that in writing too, with a flat price for each scope so you can phase the work if needed. Call (737) 337-8049 and we’ll read any competing quote with you - free second opinion, no obligation.
Our Reflectix Service Process - Step by Step
- 1
Diagnosis with thermal imaging and blower-door test. We pressurize your home to measure air leakage - a blower-door test, which shows in one number how much conditioned air your building envelope is losing. In San Marcos attics, we also run thermal imaging to find the bare zones and compressed insulation common in campus-area rental properties where rooftop HVAC replacements have displaced original blow-in.
- 2
Written scope and price before any work starts. Haven Standard Clause 1: flat price, written scope, written warranty. No exceptions. You’ll know exactly what Reflectix products we’re using, what air-sealing work precedes them, and what blower-door improvement we expect.
- 3
Air sealing first, then Reflectix installation. We seal top plates, can lights, plumbing and electrical penetrations, and chimney chases before any radiant barrier goes up. Blowing insulation over an unsealed attic floor is work we simply won’t do.
- 4
Installation with proper gaps, supports, and tape. Reflectix foil hung with required air space, supported at correct spans, seams sealed with manufacturer-compatible foil tape rated for roof-deck temperatures.
- 5
Blower-door verification and documentation. We test again after completion. You get the before-and-after numbers on a single printed page, plus a Documented Photo Record of the completed work. The 365-Day Done Right Promise applies to everything.
Reflectix Products We Service & Install in San Marcos
We work with the full Reflectix Insulation in Redwood, TX product line and throughout the region: Double Reflective Insulation Roll for attic floor and wall applications; Double Reflective Foil Insulation with Embedded Wire for installations requiring structural support across wider spans; Heavy-Duty Reflective Foil Tape for seam sealing and repair; and Radiant Barrier Perforated Foil where vapor permeability matters in San Marcos’s humid Gulf-influenced climate. We stock these materials locally for same-day or next-day service on most repair calls. For projects requiring additional insulation types, we also source from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber - no proprietary lock-in, just the right material for your specific attic conditions.
We Also Service These Brands
Our crews are equally familiar with AtticFoil, RadiantGuard, Fi-Foil, and generic radiant barrier products, plus the full range of blown-in, batt, and spray foam insulation systems. We’re insulation technicians first, brand-agnostic second. Whether your San Marcos home has a mix of materials from previous contractors or you’re evaluating options for new construction on the I-35 corridor, we diagnose and repair without pushing a single manufacturer’s product line.
FAQs - Reflectix Insulation Service in San Marcos
No. We are an independent Reflectix service provider, not affiliated with or authorized by Reflectix Inc. We install and repair their products based on field experience with how they perform in San Marcos attics, not on manufacturer certification. This independence means we can also recommend alternative products when they’re better suited to your specific conditions.
No. Reflectix radiant barrier requires an air gap of at least 3/4 inch to reflect radiant heat. Stapled flat against roof sheathing, it becomes a heat conductor and will delaminate within one or two summers in San Marcos’s 98-105°F sustained heat. We install with proper baffles and strapping to maintain the required gap. Call (737) 337-8049 if you suspect your existing barrier was installed flat - we can assess the damage during a free estimate.
No. Reflectix is a radiant barrier, not conductive insulation. It blocks radiant heat transfer but does almost nothing to slow heat movement through conduction or convection. In San Marcos’s climate, where cooling load punishes under-insulated attics from June through September, you need both: proper conductive insulation (blown-in, batt, or spray foam) plus radiant barrier in the right application. We evaluate your existing assembly and tell you honestly whether adding Reflectix makes sense or whether your money is better spent on air sealing and insulation top-up first.
Reflectix Heavy-Duty Reflective Foil Tape or equivalent high-temperature foil tape with acrylic adhesive rated for sustained 140°F+ surface temperatures. Standard duct tape fails in months. Generic “foil tape” from the hardware store often uses rubber adhesive that turns to goo in a San Marcos attic. We stock the correct tape and include proper seam sealing in every installation scope. If you’re inspecting your own attic and see gaps at the seams, that’s likely your first failure point.
For roof deck application in San Marcos, we typically specify Reflectix Radiant Barrier Perforated Foil hung with an air gap, or the Double Reflective Foil Insulation with Embedded Wire if structural support across 24-inch truss spacing is needed. The perforated foil allows moisture vapor to escape, which matters in our Gulf-humidity climate where flash flood events and seasonal moisture swings can trap condensation in attic assemblies. We never recommend the bubble product for roof deck - it’s designed for duct wrap, floor, and wall applications.
Only if installed incorrectly. Non-perforated Reflectix used as a vapor barrier on the wrong side of the assembly can trap moisture in San Marcos’s humid conditions. We specify perforated radiant barrier for attic applications, ensure proper attic ventilation with baffles at soffits and adequate ridge or gable venting, and always complete air sealing at the attic floor first so conditioned air isn’t pumping moisture into the cavity. If your attic has existing moisture staining or mold concern, we address that before any radiant barrier goes up. Call (737) 337-8049 for an assessment - estimates are free and include thermal imaging where applicable.
Most radiant barrier installations in San Marcos homes run between $1,800 and $3,400 for attic floor or roof deck application, depending on square footage, accessibility, and whether air sealing and insulation top-up are needed simultaneously. Repair work - re-taping seams, replacing damaged sections, adding support strapping - typically falls between $400 and $900. We provide a flat written price before any work starts, with line-item scope so you know exactly what each component costs. Call (737) 337-8049 for a free estimate with thermal imaging and blower-door testing included.
Book Your Reflectix Service in San Marcos, TX
Call (737) 337-8049 to schedule your Reflectix in Kyle or San Marcos insulation assessment. A live person answers 24/7. We’ll arrive on schedule, run a blower-door test, show you thermal images of your attic, and leave you with a written price and written scope before any work starts. Every job closes with a Documented Photo Record and, on applicable work, before-and-after blower-door numbers on a single printed page. The 365-Day Done Right Promise applies to all completed work - if it’s not done right, we make it right.
Written by Wes Okafor, Owner at Topside Attic Insulation San Marcos, serving San Marcos since 2016.