Trusted Attic Air Sealing for Cedar Park Homeowners
Attic air sealing in Cedar Park typically costs $1,200-$2,800 for a complete job, and most homes we work on show a 30-50% reduction in air leakage measured by blower-door test. We’re Topside Attic Insulation Cedar Park, offering Cedar Park Attic Air Sealing and independently owned and operated under The Haven Standard since 2016; we’ve sealed and insulated more than 9,000 homes with a written price before any work starts and a documented record when we leave. If your upstairs rooms run hot in July, your energy bills spike every summer, or you feel drafts near ceiling fixtures, the problem usually isn’t your insulation - it’s the air moving through gaps your insulation can’t stop. Call (737) 245-6428 and a live person answers, 24/7. Same-day estimates are available across Cedar Park, from Ranch at Brushy Creek to Buttercup Creek to the newer builds near Cypress Creek.
What Our Attic Air Sealing Service Includes
Attic Floor Air Sealing
The attic floor is where your conditioned living space meets the unconditioned attic, and in most Cedar Park homes built between 1995 and 2015, that boundary leaks like a sieve. We seal every gap, crack, and seam in the attic floor decking, focusing on the areas where drywall meets framing and where plumbing or electrical runs pierce the envelope. In neighborhoods like Leander Hills and Cedar Park Town Center, we regularly find attic floors with cumulative leakage equivalent to a 2-square-foot hole open to the outside year-round. Our crew uses Owens Corning FOAMULAR rigid foam, acoustical sealant, and high-temperature caulk to close those pathways permanently, and we photograph every sealed location for your Documented Photo Record.
Top Plate & Penetration Sealing
The top plate is the horizontal framing member where interior walls meet the ceiling, and it’s one of the most overlooked leak sites in Texas construction. We seal both the exterior and interior top plates, plus every wire, pipe, and duct penetration that passes through them, because conditioned air follows the path of least resistance straight into your attic. In two-story homes common in Buttercup Creek and Ranch at Brushy Creek, we often find top-plate leakage so severe that the master bedroom pressurizes the attic while the downstairs family room pulls in garage fumes. We address this with a combination of Knauf EcoSeal sealant, fire-rated foam, and mechanical blocking where code requires it, always completed before any insulation goes in.
Can Light & Duct Boot Sealing
Recessed can lights and HVAC duct boots are designed to move air inside your home, but when they’re not properly sealed at the attic side, they become expressways for conditioned air to escape. We seal every can light with fire-rated covers or pre-formed airtight boxes, depending on whether the fixture is IC-rated, and we mastic-seal every duct boot to the drywall or framing below. In Cedar Park’s older homes near Cypress Creek Road, we’ve found duct boots so loose you could slide a hand between the metal and the ceiling; in newer construction near Leander and Round Rock Attic Air Sealing jobs, the problem is often builder-grade tape that failed within the first two summers. Our fix holds. We use Johns Manville duct sealant and mechanical fasteners, and we test our work with a smoke pencil before we leave.
Attic Hatch Sealing
The attic hatch is the only intentional hole in your ceiling, and without proper sealing, it can leak more air than a dozen recessed lights combined. We install rigid insulated covers with compression weatherstripping on the attic side, plus latch mechanisms that maintain positive seal pressure even as seasonal humidity shifts the wood. In Cedar Park’s climate, where attic temperatures reach 140°F in August and drop below freezing in January, hatch materials take a beating; we use GreenFiber-treated wood components and metal hardware rated for that thermal cycling. Every hatch we seal gets a label documenting the R-value and the date, so the next homeowner or inspector knows what they’re looking at.
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.
Brands We Service for Attic Air Sealing
We’ve worked with Owens Corning air-sealing systems since 2016, and we stock their FOAMULAR rigid foam boards, ProPink sealants, and certified accessories for every attic configuration we encounter in Cedar Park. Their products integrate cleanly with the blown-in insulation we install after sealing, and we’ve documented hundreds of jobs where Owens Corning materials delivered the airtightness numbers we promised in writing.
We also specify Johns Manville duct sealants and Knauf insulation-compatible sealants on jobs where the existing HVAC layout demands particular chemical compatibility or temperature ratings. Whether your home was built with Owens Corning, Johns Manville, Knauf, or any other make of building material, we can source the right sealant and install it to the manufacturer’s specification. No proprietary lock-in, no guesswork - just the right product for your specific envelope, documented in your written scope.
Signs You Need Attic Air Sealing Right Now
- Your upstairs rooms are 8-12 degrees hotter than downstairs in summer. This isn’t normal. In Cedar Park’s climate, where cooling dominates nine months of the year, temperature stratification usually means conditioned air is escaping through the attic floor faster than your HVAC can replace it. We measure this with a blower-door test - a pressurization reading that shows, in one number, how much air your building envelope is losing - and we typically find pre-sealing readings of 3,500-5,500 CFM50 in homes with this symptom.
- Your energy bills spike every June and stay high through October. The Texas heat is predictable; your bill shouldn’t be a surprise. If you’re paying $300-$500 monthly for a 2,200-square-foot home in Ranch at Brushy Creek or nearby Leander, air leakage is almost certainly forcing your AC to run overtime. After proper sealing, we typically see blower-door reductions of 30-50%, which translates to measurable bill relief within the first billing cycle.
- You feel drafts near ceiling fixtures, outlets, or baseboards on interior walls. Air follows pressure gradients, and in a leaky house, that means pulling outside air in through every crack while pushing your conditioned air out through the attic. The drafts you feel are the intake side of the problem; the attic is where the exhaust is happening. Sealing the attic floor breaks that cycle.
- Your insulation is dirty or stained, especially near the eaves. Clean insulation stays put; dirty insulation is filtering air that’s moving through it. If your blown-in fiberglass looks gray or black near the attic perimeter, that’s not mold - it’s dust from your living space being pulled through the material by air pressure. Adding more insulation over this problem just buries the evidence without fixing the leak.
- Your home was built before 2015 and has never had blower-door testing. Texas energy codes didn’t require blower-door verification until the 2015 IECC cycle, and even then, enforcement varied by municipality. Most Cedar Park homes built in the 2000s and early 2010s were never tested for airtightness, and the default construction practices of that era left significant leakage in top plates, penetrations, and attic hatches. If you don’t have a number, you don’t know what you’re losing.
Our Attic Air Sealing Process - Step by Step
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Schedule your free estimate with a written price promise. Call (737) 245-6428 and a live person answers, 24/7. We book a site visit at your convenience, and under Haven Standard Clause 1, you’ll receive a flat price, written scope, and written warranty before anyone lifts a tool. No exceptions. We also offer a Free Second Opinion on any written estimate from another contractor - bring us their paperwork and we’ll read it with you.
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Blower-door test and attic inspection with photo documentation. Our technician runs a blower-door test to establish your home’s baseline air leakage in CFM50 - the standard pressurization metric that shows, in one figure, how much conditioned air you’re losing. We photograph every leak site we identify, from top plates to can lights to duct boots, and we review these images with you before any work is approved.
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Written scope review and scheduling. You get a written scope that specifies every location to be sealed, the materials we’ll use (Owens Corning, Johns Manville, Knauf, or GreenFiber as appropriate), and the target blower-door reduction we expect to achieve. You approve the scope and the price in writing; only then do we schedule the work.
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Air sealing execution with real-time documentation. Our background-checked, uniformed technicians arrive on schedule - under Haven Standard, you get a named technician and a text when they’re on the way. They seal every item in your written scope, photographing each completed location for your Documented Photo Record. No insulation is added until the sealing is verified complete; we never blow insulation over an unsealed attic floor.
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Post-work blower-door test and results delivery. We run a second blower-door test to measure your actual improvement, and we deliver the before-and-after numbers in writing. Your final documentation includes: the written scope, the photo record, the blower-door readings, and your 365-Day Done Right Promise. If it’s not done right, we make it right - backed by the written warranty you received before work started.
How Much Does Attic Air Sealing Cost in Cedar Park?
A typical attic floor air sealing job in a 1,800-2,400 square foot Cedar Park home runs $1,200-$1,900, depending on the number of penetrations, the accessibility of the attic, and whether we need to remove existing insulation first - see our guide to how much Attic Air Sealing costs for a full breakdown. Top plate and penetration sealing in a two-story home adds $400-$700, reflecting the additional linear footage and the tighter working conditions between roof trusses. Can light sealing runs $45-$85 per fixture, including fire-rated covers and mastic-sealed duct boots at $75-$125 each. Attic hatch sealing with an insulated cover and compression weatherstripping typically costs $180-$320.
Several factors move the price within these ranges. Attic height matters: a 10/12 pitch roof in Ranch at Brushy Creek takes longer to navigate than a shallow truss in a 1990s ranch near Cypress Creek. Existing insulation condition matters: if we need to remove contaminated or compressed material before we can access the leaks, that’s additional labor and disposal. And the sheer number of penetrations varies enormously - a home with 18 can lights, three bathroom fans, and two HVAC zones has a very different scope than a home with four fixtures and a single system.
What affects price most is whether you seal first or try to insulate over the problem. We see this regularly: a homeowner who skipped Attic Air Sealing in Leander or Brushy Creek pays for additional blown-in insulation, then calls us a year later because the upstairs is still hot and the bills haven’t dropped. The insulation they paid for is doing its job - it’s just that air is moving around it, not through it. Sealing first, then insulating, is the only sequence that delivers the performance you’re paying for. Under Haven Standard, we publish your before-and-after blower-door numbers so you can verify the result yourself.
Every estimate we provide is free, written, and delivered before any work starts. Bring us a competing quote and we’ll give you a Free Second Opinion - we’ll read their scope with you and explain where the differences are. No obligation, no pressure.
Attic Air Sealing Near Cedar Park - Our Service Area
We run attic air sealing crews throughout the Austin metro, with typical response times of same-day to 48 hours across Cedar Park, Leander, Brushy Creek, Jollyville, Round Rock, Wells Branch, Lago Vista, Georgetown, Pflugerville, Lakeway, Austin, and Lost Creek. Most of our Cedar Park work clusters in Ranch at Brushy Creek, Buttercup Creek, Cedar Park Town Center, and the newer developments near Cypress Creek, but we service every neighborhood from the 183 corridor to the Balcones Canyonlands Preserve boundary. If you’re unsure whether you’re in our service area, call (737) 245-6428 - a live person answers 24/7 and can confirm availability for your address.
Serving Cedar Park, TX - Our Local Coverage Area
We’re based in the Cedar Park area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Attic Air Sealing in Cedar Park
Attic air sealing is the process of closing gaps, cracks, and penetrations in the ceiling plane and attic floor that allow conditioned air to escape into the unconditioned attic space. We seal top plates where walls meet ceilings, electrical and plumbing penetrations, recessed can lights, duct boots, and attic hatches using fire-rated foams, sealants, and rigid covers - then we verify the result with a blower-door test that measures your actual air leakage reduction. Every job gets a written scope, photo documentation, and before-and-after numbers so you know what changed.
Most complete attic air sealing jobs in Cedar Park take one to two days, depending on attic accessibility and the number of penetrations. A single-story ranch with a straightforward attic and 6-8 can lights typically wraps in a single day; a two-story home in Ranch at Brushy Creek with 20+ fixtures, multiple HVAC zones, and a complex roofline may need a second day. We never rush the verification step - the post-work blower-door test and photo review are non-negotiable parts of our process. Call (737) 245-6428 for a written estimate with a specific timeline for your home.
Most complete attic air sealing jobs in Cedar Park run $1,200-$2,800, with the majority of single-family homes falling in the $1,500-$2,200 range. The price depends on square footage, attic accessibility, number of fixtures to seal, and whether existing insulation needs removal first. We provide a flat, written price before any work starts - no open-ended hourly rates, no surprises - and we offer a Free Second Opinion on any competitor’s written estimate. Call (737) 245-6428 for your specific number; estimates are free.
Yes. We’ve installed and sealed with Owens Corning products since 2016, and we stock their FOUMULAR rigid foam, ProPink sealants, and compatible accessories for Cedar Park jobs. We also work with Johns Manville, Knauf, and GreenFiber materials when the specific application calls for different chemical properties or temperature ratings. We don’t have exclusive relationships with any manufacturer - we specify what works for your specific envelope, documented in your written scope.
We answer calls live 24/7 at (737) 245-6428, and we offer same-day estimates across Cedar Park for attic air sealing when our schedule permits. True emergencies in this category are rare - attic air leakage is a chronic efficiency problem, not a sudden failure - but if you’ve discovered a safety issue like a disconnected duct dumping moisture into your attic or a can light housing that’s overheated, we’ll prioritize your call and get a technician out as fast as possible. For standard scheduling, we typically book within 24-48 hours.
Every attic air sealing job is covered by our 365-Day Done Right Promise - if it’s not done right, we make it right. The specific warranty terms are written and delivered before work starts, under Haven Standard Clause 1, and they cover both materials and workmanship. If your blower-door numbers don’t meet the target we specified in your written scope, we return and correct the deficiency at no charge. The warranty, the scope, and the photo record are yours to keep.
Clear a path to your attic hatch and remove any stored items within 3 feet of the access point - our technicians need room for ladders and material staging. If you have pets, secure them in a separate room during the visit; we’ll be opening and closing the front door repeatedly. You don’t need to be home for the entire job, but we do need access at the start to review the written scope and at the end to present the blower-door results and photo documentation. Call (737) 245-6428 to schedule, and we’ll send a text when your technician is on the way.
Schedule Your Attic Air Sealing Service in Cedar Park Today
Call (737) 245-6428 now - a live person answers 24/7, no voicemail loops. We’ll book your free estimate, deliver a written price before any work starts, and seal your attic to numbers you can verify yourself. Under The Haven Standard since 2016: flat price, written scope, written warranty, documented results. No exceptions.
Written by Wes Okafor, Owner at Topside Attic Insulation Cedar Park, serving Cedar Park, Leander, and Brushy Creek since 2016.