Fast, Reliable Attic Insulation Across Round Rock
Most attic insulation jobs in Round Rock run $1,800-$4,500 depending on square footage and whether air sealing and radiant barrier are part of the scope. Our crews serve Round Rock from our Austin office, and we typically schedule within 48 hours for standard jobs or same-day for urgent heat-loss situations. Call (737) 252-7159 for a written price before any work starts.
We’ve insulated attics in Oak Creek, Old Round Rock, and across the Dell-boom subdivisions east of I-35. The tract homes built between 1993 and 2015 - Behrens Ranch, Eagle Ridge, Chandler Crossing - share a common problem: original insulation installed to minimum code that has degraded through two decades of Central Texas heat cycles. We know what we’ll find before we pull down the attic ladder.
Why Topside Attic Insulation Leander Is Round Rock’s Preferred Attic Insulation Company
Our reputation in Round Rock is built on documentation, not promises. We’ve completed attic insulation and air-sealing work in ZIP codes 78660, 78664, 78665, and 78681, and our Round Rock customers receive before-and-after blower-door numbers on every applicable job - a pressurization reading that shows, in one figure, how much conditioned air the home was losing before and after the work.
Response time to Round Rock is typically same-day or next-day. Our dispatch operates from the Austin office, but crews are routed locally and carry Owens Corning, GreenFiber, and Icynene materials on the truck. That matters for acreage properties around Indian Ridge or Behrens Ranch where a detached workshop insulation job can’t wait on a second delivery.
Round Rock homeowners read reviews carefully. We get that. Our three-star reviews are public, and we respond to every one. The pattern we see: customers who value the written scope, the photo documentation, and the 365-Day Done Right Promise. Under Haven Standard: Have it in writing. Every job gets one.
Our Attic Insulation Services in Round Rock

Blown-In Attic Insulation
Blown-In Insulation - Round Rock - loose-fill fiberglass or cellulose blown through a hose to fill irregular joist cavities - is what most Round Rock homes need. The Dell-boom tract homes in Fern Bluff and Lake Forest were built with R-30 fiberglass batts that have compressed to R-11 or lower under years of 150°F+ attic temperatures. We remove or cap the degraded material and blow high-density Owens Corning or GreenFiber to R-49, the current IECC standard for this climate zone. For west-facing rooflines in ZIP 78664 and 78665, we pair this with radiant barrier installation in the same visit.

Attic Batt Insulation
Batt insulation - pre-cut fiberglass or mineral wool panels - still has a place in Round Rock, particularly in new additions, knee-wall spaces, or outbuildings with regular joist spacing. We stock Johns Manville and Owens Corning batts and install them after air sealing of top plates and penetrations is complete. We don’t blow insulation over an unsealed attic floor. Sealed first, then insulated. In that order.

Attic Insulation Top-Up
The top-up is our most common Round Rock service. Homeowners in Cimarron and Eagle Ridge call when their August electric bill spikes or the upstairs bedrooms won’t cool below 78°F. We assess what’s there, measure settled depth, and calculate the gap to R-49. Most top-ups run $1,800-$3,200 for a 2,000-square-foot footprint. We recently topped up a 2004 tract home in Chandler Crossing where the original R-30 fiberglass had settled to about R-11 and the west-facing attic hit 158°F by mid-afternoon. Our crew installed high-density blown-in Owens Corning insulation to R-49 and added a radiant barrier to the west roof deck in one trip. The homeowner’s August electric bill dropped noticeably, and the attic stayed cool enough to store holiday decorations without melting the plastic bins.

Attic Insulation Replacement
Full replacement is necessary when existing insulation is contaminated, water-damaged, or so degraded that topping up is throwing good material after bad. In Round Rock Glen and older sections of Old Round Rock, we’ve pulled out insulation compromised by roof leaks, rodent activity, or decades of dust loading. Replacement includes removal, disposal, air sealing, and new installation to R-49 with a documented photo record at each stage. Typical range: $3,200-$5,800.

Attic Baffles & Ventilation Prep
Attic baffles - cardboard or foam channels that maintain airflow from soffit vents up the roof deck - are critical in Round Rock’s low-pitched ranch and two-story designs. Without them, blown-in insulation blocks soffit intake and creates moisture traps. We install baffles at every soffit bay before insulating, ensuring the ventilation path is preserved. This is standard on every blown-in job, not an add-on.

What happens when you call
- 1
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 Round Rock
We source materials from Owens Corning, Johns Manville, Knauf, Icynene, Demilec, and GreenFiber - no proprietary product lock-in. For Round Rock jobs, we stock Owens Corning AttiCat blown-in fiberglass and GreenFiber cellulose on the truck, with Icynene open-cell spray foam available for specialized applications like cathedral ceilings or conditioned attic conversions. Our crew carries enough material to complete most single-family jobs and detached workshop insulation in one trip, including acreage properties off West Parmer Lane or State Highway 45 North where return trips are costly for the homeowner.
Common Attic Insulation Problems We See in Round Rock Homes

- Compressed builder-grade batts in 1990s-2000s tract homes. In Eagle Ridge and Cimarron, the original fiberglass batts have compressed under 150°F+ attic heat, creating convective loops that let summer heat radiate straight into living spaces. The insulation is still there. It just doesn’t work anymore.
- Missing radiant barriers on west-facing rooflines. In ZIP 78664 and 78665, builders commonly skipped radiant barriers to hit price points. Attics in Fern Bluff and Lake Forest routinely exceed 155°F, cooking HVAC ducts and forcing the system to run longer than it should.
- Detached workshops with no thermal envelope. Acreage properties in Indian Ridge and Behrens Ranch often have outbuildings where insulation was never considered. These structures become unusable in summer and freeze-risk points in winter.
- Attic ventilation choked by added insulation. Well-meaning homeowners or prior contractors blew insulation without baffles, blocking soffit intake. Moisture builds. Roof deck life shortens. We see this in older Round Rock Glen ranches where the attic was “improved” without understanding the airflow.
Pricing for Attic Insulation in Round Rock, TX
| Service | Typical Range (Round Rock) |
|---|---|
| Attic Insulation Top-Up (to R-49) | $1,800 - $3,200 |
| Full Attic Insulation Replacement | $3,200 - $5,800 |
| Blown-In Insulation with Air Sealing | $2,400 - $4,200 |
| Radiant Barrier Addition (west-facing roof) | $800 - $1,600 |
| Attic Baffles & Ventilation Prep | $400 - $800 |
| Detached Workshop Insulation | $1,200 - $2,800 |
What moves the number: attic square footage, current insulation condition, accessibility (steep roof pitch or tight scuttle adds labor), whether air sealing is needed, and whether we’re insulating multiple structures on an acreage property. Every job begins with a written price - no work starts without it - and we offer a Free Second Opinion on any written estimate from another contractor. Call (737) 252-7159 for your written scope.
We Also Serve Cities Near Round Rock

Our crews work throughout the northern Austin metro, including Attic Insulation in Round Rock as well as Pflugerville, Hutto, Georgetown, and Cedar Park. Dispatch is coordinated from our Austin office, with local routing to minimize drive time and fuel surcharges. For Attic Insulation service in any of these areas, the same Haven Standard applies: written price, documented record, 365-Day Done Right Promise.
Serving Round Rock, TX - Our Local Coverage Area
We’re based in the Round Rock 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 - Attic Insulation in Round Rock

Check your attic insulation depth with a ruler. If it’s less than 12 inches, or if you can see the tops of the ceiling joists, you’re below R-38 and likely well below the R-49 standard. Most Dell-boom homes in Chandler Crossing, Lake Forest, and Eagle Ridge were built with R-30 that has settled to R-11-R-15. Call (737) 252-7159 and we’ll measure it properly, with a written price for the fix.
Yes. We regularly insulate detached workshops and outbuildings on acreage properties in Behrens Ranch, Indian Ridge, and along West Palm Valley Boulevard. Our trucks carry enough material to complete the house and outbuildings in one trip. Bring us your written estimate from another contractor and we’ll give you a Free Second Opinion.
High-density blown-in fiberglass or cellulose to R-49, paired with a radiant barrier on the roof deck. In ZIP 78664 and 78665, where builders often omitted radiant barriers, this combination drops attic temperatures by 20-40°F and reduces the load on ductwork running through the attic. We install both in a single visit.
The freeze exposed how many Dell-boom homes had inadequate attic insulation and air sealing. Homes with degraded R-30 or missing top-plate sealing lost heat rapidly, and some experienced pipe freezes in exterior walls. Since 2021, we’ve seen a surge in Round Rock homeowners requesting both insulation upgrades and air sealing to prevent a repeat. The work pays for itself in summer cooling savings too.
Yes. Baffle installation is standard prep work before any blown-in insulation job, not a separate visit. Our crew installs baffles at every soffit bay, verifies ridge vent flow, and then blows insulation. You get a Documented Photo Record of each step. Call (737) 252-7159 to schedule.
Ready to fix your attic? Call (737) 252-7159 for a free estimate with a written price before any work starts. Our Attic Insulation team serves Round Rock and surrounding areas with the Haven Standard: documented results, no exceptions.
Written by Wes Okafor, Owner at Envelope Insulation Co., serving Round Rock since 2016 under The Haven Standard.