Fast, Reliable Blown-In Insulation Across Cibolo
Most blown-in insulation jobs in Cibolo run $1,800-$4,200 for a typical attic, and our crews can usually assess your home and provide a written price the same week you call. We also offer Spray Foam Insulation - Cibolo for homeowners seeking higher performance. We dispatch from our San Antonio office and serve Cibolo neighborhoods regularly - from the subdivisions spreading along FM 78 to the newer developments near IH-35 in Guadalupe County. If your post-2000 production home never seems to cool evenly or your HVAC runs constantly through July, the problem is often settled attic insulation that dropped below effective R-value years ago. Call (830) 420-0953 to schedule a free assessment with a written price before any work starts.
Why Topside Attic Insulation Converse Is Cibolo’s Preferred Blown-In Insulation Company
We’ve worked in enough Cibolo attics to recognize the pattern before we climb the ladder. Nearly every home here was built between 2000 and 2015 by high-volume builders rushing to meet demand along FM 78 and IH-35. The blown-in fiberglass passed inspection at the time. Then it settled. Homeowners in subdivisions near JBSA-Randolph call us when their second-story bedrooms won’t cool below 78°F despite a system that never shuts off.
Our reviews from Cibolo customers consistently mention the same thing: we show the photos, we give the blower-door numbers, and we don’t start until the price is in writing. Under Haven Standard: Arrive on schedule, you get a named technician and a text when they are on the way. Dispatch and scheduling are coordinated from our San Antonio office, but crews serve Cibolo locally with same-week availability for most assessments.
Wes Okafor has led Envelope Insulation Co. since 2016, and every job - including every Blown-In Insulation in Cibolo - closes with a Documented Photo Record and, on applicable jobs, before-and-after blower-door readings so you can verify the air-sealing result in a single figure.
Our Blown-In Insulation Services in Cibolo
Blown-In Cellulose
We install GreenFiber cellulose in Cibolo attics more often than any other blown-in material. Cellulose handles IECC Climate Zone 2A’s inward vapor drive better than fiberglass when the assembly is properly air-sealed first - which it always is on our jobs. We blow to a uniform R-49 with vent baffles maintaining full depth at the eaves, where Cibolo’s post-2000 tract homes typically show bare drywall from settled fiberglass. A typical full attic replacement with cellulose in Cibolo runs $2,400-$4,200.
Blown-In Fiberglass
When homeowners prefer fiberglass, we source from Owens Corning and Johns Manville - no proprietary lock-in, so you get the material that fits your budget and performance goals. Blown-in fiberglass works in Cibolo, but only after we’ve sealed the top plates, can lights, and penetrations that production builders left open. Unsealed fiberglass in a hot-humid attic is a leaky filter, not insulation. We never blow new material over an unsealed deck. Top-ups with fiberglass in Cibolo typically run $1,800-$3,200.
Dense-Pack Wall Insulation
Cibolo’s 2×4 framed walls with compressed fiberglass batts behind the outlets are a major thermal bypass. Dense-pack cellulose fills the cavity completely, eliminating convection loops that batts allow. We drill and fill from either interior or exterior, depending on your siding type and preference, then patch and paint-match. This is labor-intensive work, but it’s the only way to fix what rushed production installs left behind. Dense-pack wall jobs in Cibolo generally fall between $2,800-$5,500 depending on home size and wall area.
Blown-In Top-Up
Not every Cibolo attic needs full removal. If your existing blown-in fiberglass is merely thin and settled - not contaminated or water-damaged - we can air-seal first, then blow new material over the old to reach uniform R-49. This is the most common scenario in Cibolo’s 10-to-20-year-old “new” homes. The key is the air sealing. Without it, you’re paying for insulation that leaks conditioned air back into the attic through the same gaps that caused your original problem. Top-ups in Cibolo typically run $1,800-$3,000.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Before
AfterTrusted Brands We Service in Cibolo
We stock GreenFiber cellulose, Owens Corning fiberglass, and Johns Manville blown-in products for Cibolo jobs - no waiting on special orders, no proprietary product lock-in. Our Blown-In Insulation team selects the material based on your attic’s condition, your budget, and the specific failure pattern we find. If your home has active inward vapor drive from unsealed can lights, we’ll steer you toward cellulose. If you need a cost-effective top-up on a relatively clean attic, fiberglass may make more sense. Either way, you get the brand name in writing on your scope before anyone starts.
Common Blown-In Insulation Problems We See in Cibolo Homes
- Settled fiberglass below effective R-30. Builder-minimum blown-in fiberglass installed during the mid-2000s boom settled within a few years, especially at eave edges where depth drops to near zero. Homeowners near JBSA-Randolph assume their HVAC is undersized; it’s usually the attic.
- Inward vapor drive wetting the insulation blanket. Cibolo’s hot-humid climate creates vapor pressure that pushes moisture through unsealed top plates and can lights. Wet fiberglass flattens and loses R-value exactly when attic temperatures hit 140-150°F.
- Compressed wall batts behind outlets and switches. Production builders along FM 78 and IH-35 installed fiberglass batts quickly, often compressing them at electrical boxes and leaving thermal bridges that blown-in attic work alone cannot fix.
- Blown-in top-ups over unsealed decks. Some contractors add insulation without air sealing first. In Cibolo’s climate, this is wasted money - conditioned air leaks through the same gaps, and the new material performs below its rated R-value.
Pricing for Blown-In Insulation in Cibolo, TX
Here’s what blown-in insulation costs in Cibolo’s market right now:
| Service | Typical Range |
|---|---|
| Blown-in cellulose (full attic, R-49) | $2,400 - $4,200 |
| Blown-in fiberglass (full attic, R-49) | $2,200 - $3,800 |
| Blown-in top-up over existing | $1,800 - $3,000 |
| Dense-pack wall insulation | $2,800 - $5,500 |
| Attic air sealing (standalone) | $800 - $1,600 |
What moves you within these ranges: attic square footage, current insulation condition, accessibility, and whether we need to install vent baffles or address active moisture issues. Every job gets a Written Price Before Any Work Starts - Haven Standard Clause 1 - and a Free Second Opinion on any competing written estimate you bring us. Call (830) 420-0953 for your exact figure; estimates are free.
We Also Serve Cities Near Cibolo
Our crews work throughout the I-35 corridor, including Cibolo neighbors in Schertz, Universal City, Converse, and New Braunfels. The same post-2000 production-home patterns show up in Schertz and Converse; New Braunfels has more variety but similar builder-minimum insulation issues in its boom-era subdivisions.
Serving Cibolo, TX - Our Local Coverage Area
We’re based in the Cibolo area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Blown-In Insulation in Cibolo
Your 2006 home was insulated to builder-minimum standards with blown-in fiberglass that passed code inspection at the time but settled below effective R-30 within several years, particularly at eave edges where depth often drops to near zero. This is the standard pattern in Cibolo’s post-2000 production homes, not an exception. On a mid-2000s production home in the subdivisions off FM 78 near JBSA-Randolph, our crew found the blown-in fiberglass attic depth collapsed to bare drywall at the eave edges and hovering around R-22 in the middle of the deck, while the original 2×4 wall batts were compressed behind the outlets. We air-sealed the top plates and can lights, then blew GreenFiber cellulose to a uniform R-49 with baffles holding depth at the eaves; the homeowner’s oversized system stopped short-cycling within the first cooling week. Call (830) 420-0953 for a free assessment - estimates are free.
Yes - Cibolo’s IECC Climate Zone 2A designation means attic temperatures exceed 140-150°F in summer and Gulf Coast humidity creates inward vapor drive through any unsealed assembly. Air sealing of top plates, can lights, and penetrations is mandatory before insulation goes in; without it, moisture wets the insulation blanket and flattens its R-value. We also install vent baffles at every eave to maintain depth where Cibolo’s settled fiberglass typically fails first. The February 2021 Winter Storm Uri exposed how poorly builder-minimum insulation performed during hard freezes, triggering a sustained wave of upgrade inquiries from homeowners who had assumed “new construction” meant well-insulated. Call (830) 420-0953 to discuss your specific attic conditions.
Often yes, if the existing material is clean, dry, and uncontaminated - which we verify during assessment. Most Cibolo top-ups involve air-sealing first, then blowing new cellulose or fiberglass over the old to reach uniform R-49. The critical step is the air sealing. Adding insulation over an unsealed attic deck simply traps the same leaks and wastes your investment. We document the condition with photos before recommending top-up versus full removal. Typical top-up cost in Cibolo: $1,800-$3,000. Call (830) 420-0953 for a written price before any work starts.
The clearest indicator is uneven cooling - upstairs bedrooms that won’t reach set temperature while the system runs continuously, especially in July and August. Check your attic hatch: if you can see the ceiling drywall through thin or patchy insulation, or if depth varies dramatically across the deck, you likely have settled fiberglass below effective R-value. We verify with a blower-door test - a pressurization reading that shows, in one number, how much conditioned air your building envelope is losing - and thermal imaging to pinpoint exactly where the attic is bleeding energy. Call (830) 420-0953 to schedule; estimates are free and include the Documented Photo Record.
We install GreenFiber cellulose, Owens Corning fiberglass, and Johns Manville blown-in products, with Knauf available on request. No proprietary lock-in - we select based on your attic’s condition, your performance goals, and your budget. Every brand goes in after air sealing, with vent baffles at the eaves and depth verified across the full deck. Your written scope specifies the exact material before anyone lifts a tool. Call (830) 420-0953 to discuss which option fits your Cibolo home.
Ready to fix the attic that’s been driving your HVAC bills up since the day you moved in? Call (830) 420-0953 for a free assessment with a written price before any work starts. Every job includes air sealing first, then insulation - in that order - plus a Documented Photo Record and, on applicable jobs, before-and-after blower-door numbers so you can see the performance change you paid for. The 365-Day Done Right Promise applies to all completed work. A live person answers calls 24/7.
Written by Wes Okafor, Owner at Envelope Insulation Co., serving Cibolo since 2016 under The Haven Standard.