Trusted Attic Air Sealing for New Braunfels Homeowners
Attic Air Sealing in New Braunfels typically costs $1,200-$2,800 for a complete job and takes one to two days. Most homes we see in the area lose 30-40% of conditioned air through leaks in the attic floor before any insulation even matters. We seal first, then insulate, and we publish before-and-after blower-door numbers so you can verify the result.
We’ve sealed and insulated more than 9,000 homes since 2016, every one with a written price before work started and a documented record when the crew left. In New Braunfels, we regularly find the same pattern: builders in developments like Vintage Oaks and River Chase blew fiberglass over leaky top plates and unsealed can lights. The insulation looks thick, but the conditioned air escapes straight through. Our crews are background-checked and uniformed, and a live person answers calls 24/7 at (830) 243-6352. Same-day appointments are often available.
What Our Attic Air Sealing Service Includes
Attic Floor Air Sealing
The attic floor is the primary pressure boundary between your living space and the vented attic above. In New Braunfels, we see gaps where drywall meets the top plate, plumbing and electrical penetrations, and dropped soffits that were never sealed during original construction. We use expanding foam, rigid blocking, and fire-rated caulk to close every bypass. Every attic floor sealing job includes a blower-door test - a pressurization reading that shows, in one number, how much air your building envelope is losing - before and after so you can see the exact CFM50 reduction.
Top Plate & Penetration Sealing
Top plates are the horizontal framing members where wall studs meet the ceiling drywall, and they’re rarely sealed in production homes around New Braunfels, Cibolo, or Seguin. We remove existing insulation in targeted sections, seal the plate with acoustical sealant or low-expansion foam depending on the gap size, then replace the insulation. For wiring penetrations and pipe chases, we use fire-stop rated materials where code requires it. Under Haven Standard: Have it in writing, you get photos of each sealed penetration in your Documented Photo Record.
Can Light & Duct Boot Sealing
Recessed can lights are essentially holes in your ceiling, and in the Hill Country heat they pump conditioned air into the attic all summer. We install pre-fabricated airtight covers or site-built boxes sealed with mastic, depending on whether the fixtures are IC-rated. Duct boots - the metal transitions between flex duct and ceiling registers - often separate from drywall due to thermal expansion. We resecure and seal with mastic, not duct tape, which degrades in attic temperatures. In Timberwood Park and Canyon Lake homes, we find this separation in roughly 60% of houses built between 2010 and 2020.
Attic Hatch Sealing
The attic hatch is the most obvious leak and the most often ignored. We build rigid insulated dams around pull-down stairs, weatherstrip the trim, and add latch hardware to maintain compression on the seal. For scuttle holes, we install a sealed, insulated cover that can be removed for access. Every hatch sealing includes a smoke-pencil verification - a visible airflow test that confirms the seal under pressure. Your written scope specifies the R-value of added insulation and the tested air leakage rate.
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 accessories and compatible insulation systems since 2016, and we stock their weatherstripping, foam sealants, and attic hatch covers for same-day completion. For homeowners with Johns Manville components already in place, we source matching sealants and maintain the manufacturer’s intended assembly. We also regularly specify Demilec spray foam for complex air-sealing geometries where caulk and rigid foam won’t conform, and we use GreenFiber cellulose as dense-pack material for kneewall and dropped-soffit applications after sealing is complete.
Whether your home was built with Owens Corning, Johns Manville, Demilec, GreenFiber, or any other manufacturer’s materials, we can match the assembly and improve it. We carry no proprietary product lock-in, so our recommendation is based on your home’s specific leakage patterns, not a distributor incentive.
Before
AfterSigns You Need Attic Air Sealing Right Now
- Your upstairs rooms are 8-12°F hotter than downstairs in July. This isn’t just “heat rises.” In New Braunfels, we measure attic temperatures of 140°F in August, and that heat radiates through leaks in the ceiling plane. The temperature stratification you feel is often driven by air leakage, not insufficient insulation.
- Your energy bills spike every summer despite a recent AC tune-up. When conditioned air leaks into the attic, your compressor runs longer to maintain setpoint. We regularly see blower-door reductions of 1,500-2,500 CFM50 in homes where the homeowner already replaced their HVAC unit without addressing the envelope.
- You feel drafts from ceiling fixtures, outlets, or baseboards on exterior walls. These are telltale signs of the stack effect - warm air escaping through attic leaks pulls replacement air in through lower gaps. Sealing the attic floor interrupts this cycle.
- Your insulation is blackened near the eaves or over top plates. That’s filtration soiling, not mold. Air moving through fiberglass carries dust that deposits on the fibers. Clean insulation with dirty spots is a diagnostic: air is moving through it, not just around it.
- Your home was built between 2005 and 2020 in a New Braunfels subdivision. Code enforcement on air sealing was inconsistent during this period, and production builders prioritized speed. We find unsealed top plates in roughly 80% of homes from this era in developments like Meyer Ranch and Copper Ridge.
Our Attic Air Sealing Process - Step by Step
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blower-door test and infrared scan. We pressurize the house to 50 Pascals and use a thermal camera to locate the largest leaks. You receive the initial CFM50 reading in writing before any work begins. This number becomes the benchmark.
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Written scope and fixed price. Under Haven Standard Clause 1, we deliver a written price, written scope, and written warranty before anyone lifts a tool. No work starts without your signature. The price does not change unless you add scope.
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Targeted removal and surface prep. We lift insulation only where sealing is required, vacuum it into bags for replacement, and clean the work surface. In New Braunfels, we often find construction debris from 2005-2015 builds that we remove before sealing.
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Seal all accessible leaks. Top plates, penetrations, can lights, duct boots, and the attic hatch are sealed with appropriate materials. We photograph each critical detail for your Documented Photo Record. Fire-rated materials are used where penetrations pass between conditioned and unconditioned space.
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Post-sealing blower-door test and documentation. We pressurize again and measure the reduction. You receive before-and-after CFM50 readings, the photo record, and your warranty documentation. If the result doesn’t meet the written target, we continue sealing at no additional cost under our 365-Day Done Right Promise.
How Much Does Attic Air Sealing Cost in New Braunfels?
A typical attic floor air sealing job in a 1,800-2,400 square foot New Braunfels home runs $1,200-$1,900. Top plate and penetration sealing for the same footprint adds $400-$700. Can light sealing runs $45-$85 per fixture depending on accessibility and whether IC-rated covers can be used. Attic hatch sealing is typically $180-$340 for a standard scuttle hole, $450-$780 for a pull-down stair assembly with rigid dam and weatherstripping. A complete attic air sealing package - all four sub-services - in a home this size usually falls between $2,100 and $2,800.
Several factors move the price. Attic height and decking affect labor time; truss attics with limited clearance take longer. The number of can lights, plumbing vent stacks, and HVAC penetrations scales the material and labor directly. Homes in Canyon Lake and Bulverde with complex rooflines often have more dropped soffits and kneewalls to seal. We also find that homes built during the 2010-2015 construction surge in Cibolo and Seguin frequently have unsealed bath fan ducts and open chase ways that add scope.
To avoid overpaying, get a written scope that specifies each leakage target and the expected blower-door reduction. A quote that only lists “air seal attic” without measurable outcomes leaves room for incomplete work. Our free estimate includes the initial blower-door test, a line-item scope, and a fixed price. Bring us any competing written estimate and we’ll review it with you - our Free Second Opinion on Any Written Estimate is included, not a promotion.
Attic Air Sealing Near New Braunfels - Our Service Area
We serve New Braunfels and the surrounding Hill Country communities with typical response times of same-day to 48 hours depending on season. Our crews work regularly in Schertz, Selma, Universal City, Live Oak, Converse, and Windcrest, where attic construction is similar to New Braunfels - vented attics with fiberglass over leaky top plates. Canyon Lake and Timberwood Park homes often require additional attention to complex roof geometries and seasonal humidity variation. Homeowners in Bulverde and north of 46 frequently have metal roofing with different condensation dynamics. We do not charge travel fees within this service area.
Serving New Braunfels, TX - Our Local Coverage Area
We’re based in the New Braunfels 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 New Braunfels
Attic air sealing is the process of closing gaps, cracks, and penetrations in the ceiling plane that separate your conditioned living space from the vented attic above. In New Braunfels, the most common leaks occur at top plates, can lights, duct boots, plumbing penetrations, and the attic hatch. Sealing these leaks before adding insulation prevents conditioned air from escaping and hot attic air from entering through the stack effect.
Most complete attic air sealing jobs in New Braunfels take one to two days. A single service like attic hatch sealing or can light sealing can often be completed in four to six hours. We schedule the blower-door test, sealing work, and post-test for consecutive days when possible so you can verify results quickly. Call (830) 243-6352 to check current availability - estimates are free.
Attic air sealing in New Braunfels typically ranges from $1,200 for targeted floor sealing to $2,800 for a complete package including top plates, penetrations, can lights, and hatch sealing. The price depends on attic accessibility, number of fixtures, and the measured leakage rate from the initial blower-door test. We provide a written, fixed price before any work starts - no surprises. Call (830) 243-6352 for your exact quote.
Yes. We regularly work with Owens Corning and Johns Manville air-sealing accessories and compatible insulation systems, and we stock materials to match existing assemblies. We also specify Demilec and GreenFiber products where they fit the application. Our recommendations are based on your home’s leakage patterns, not brand exclusivity. Call (830) 243-6352 to discuss your specific materials.
We do not classify air sealing as an emergency service, but we do answer calls 24/7 and can often schedule same-day or next-day appointments in New Braunfels during peak summer months. If you’re experiencing extreme temperature stratification or suspect a related issue like duct separation, we prioritize diagnostic appointments. A live person answers at (830) 243-6352 - no voicemail loops.
All attic air sealing is covered by our 365-Day Done Right Promise - if the blower-door result doesn’t meet the written target, or if any sealed area fails within one year, we return and correct it at no charge. You receive the written warranty before work begins, along with the scope and fixed price. The Haven Standard requires documentation on every job, so you have proof of the original work.
Clear a path to the attic hatch and remove any stored items within six feet of the access point. We need to run a blower-door fan in an exterior doorway, so please ensure we can access a door that closes tightly. Pets should be secured in a separate room during the pressurization test. We bring our own lighting, protection for floors and furniture, and HEPA vacuums for insulation handling. Call (830) 243-6352 when you’re ready to schedule - estimates are free and include the initial blower-door reading.
Schedule Your Attic Air Sealing Service in New Braunfels Today
Call (830) 243-6352 to schedule your free estimate. A live person answers 24/7. You’ll receive a written price, written scope, and written warranty before any work starts, plus before-and-after blower-door numbers so you can verify the result. Same-day appointments are often available in New Braunfels, Schertz, and Selma. No obligation, no pressure - just documented performance.
Written by Wes Okafor, Owner at Topside Attic Insulation New Braunfels, serving New Braunfels and surrounding Hill Country communities since 2016.