Attic Air Sealing in Converse - Same-Day Service, Done Right the First Time

Trusted Attic Air Sealing for Converse Homeowners

Attic Air Sealing in Converse typically costs between $1,200 and $2,800 for a complete job, and most homes we work on in the 78109 ZIP show a 30-50% reduction in air leakage when we publish the before-and-after blower-door numbers. We’re Topside Attic Insulation Converse, independently owned and operated under The Haven Standard since 2016, and we’ve sealed and insulated more than 9,000 homes with a written price before any work starts and a documented record when the crew leaves. If your upstairs rooms run hot in July, your energy bills spike every summer, or you feel drafts near ceiling fixtures even with the windows closed, you likely have conditioned air escaping through gaps in your attic floor that insulation alone cannot fix. Call (830) 420-0953 - a live person answers 24/7, and we can usually schedule a free estimate in Converse within 48 hours.

Call (830) 420-0953

What Our Attic Air Sealing Service Includes

Attic Floor Air Sealing

Attic floor air sealing is the process of closing every gap, crack, and seam in the ceiling drywall below your insulation - the thermal boundary between your conditioned living space and the vented attic above. In Converse, we regularly find homes built between 2015 and 2020 with continuous beadboard soffit vents that pull conditioned air straight up through unsealed perimeter gaps, especially in neighborhoods like Olympia and Woodlake where slab-on-grade construction creates stack-effect pressure year-round. We use Owens Corning ENERGY STAR certified sealants and expandable foam to close these bypasses, then verify the result with a blower-door test - a pressurization reading that shows, in one number, how much air your building envelope was losing before and after the work.

Top Plate & Penetration Sealing

Top plates are the horizontal framing members where interior walls meet the ceiling, and penetrations are every pipe, wire, and chimney chase that punches through your attic floor - together they account for the majority of hidden air leakage in Texas homes. We’ve documented cases in Converse’s older sections near Loop 1604 where a single unsealed top plate ran the full length of a ranch house, leaking the equivalent of a 12-inch square hole into the attic. Our crew seals these with fire-rated caulk and rigid foam baffles, then photographs every sealed penetration for your Documented Photo Record, included on every job at no extra charge.

Can Light & Duct Boot Sealing

Recessed can lights and HVAC duct boots are the most common sources of attic bypass we find during energy audits in Bexar County, because both create large holes in your ceiling that standard insulation cannot seal. Non-IC-rated can lights - still common in homes built before 2018 in Converse subdivisions like Rolling Creek and Converse Heights - cannot be covered with insulation and must be sealed with fire-rated covers and gaskets to prevent both air leakage and fire hazard. We also seal every flex-duct boot with mastic and metal tape, not duct tape, because the adhesive fails in our attic heat; under Haven Standard Clause 1, you get a written scope specifying which lights and boots we will seal before anyone lifts a tool.

Attic Hatch Sealing

The attic hatch is often the largest unsealed hole in a home’s thermal boundary, and in Converse’s climate - where attic temperatures exceed 140°F from June through September - that hole pumps conditioned air out and superheated air in every time the pressure changes. We build custom gasketed hatch covers with rigid insulation value and positive latches, or we retrofit existing scuttle holes with compression seals and weatherstripping rated for long-term heat exposure. Every hatch installation includes a blower-door verification to confirm the leakage reduction, and we publish that number on your final documentation so you can see the performance change you paid for.

Brands We Service for Attic Air Sealing

We’ve worked with Owens Corning air-sealing systems since 2016, and we specify their Foamular rigid foam and EnergyComplete sealant packages for homes in Converse where the builder originally used Owens Corning insulation - the compatibility between existing batts and new sealants matters for long-term adhesion in our humidity. Johns Manville produces the formaldehyde-free fiberglass and complementary sealants we use in homes where indoor air quality is a primary concern, particularly in newer construction near Foster Road where homeowners have requested low-VOC materials. Knauf’s EcoSeal water-based sealant is our standard for top plate work in homes with finished interiors below, because it cleans with water and won’t damage painted drywall if application requires access through a finished space.

Whether your home was built with GreenFiber cellulose, Owens Corning fiberglass, or any other insulation system, our air-sealing approach is material-agnostic - we seal first, then insulate, in that order, and we never blow new insulation over an unsealed attic floor. If you’ve received a competing quote that skips the sealing step or treats it as an upsell, bring it to us for a Free Second Opinion - we’ll read it with you and show you what should be included.

Before

After

Signs You Need Attic Air Sealing Right Now

• Upstairs rooms stay uncomfortably hot while your AC runs constantly. In Converse, we see this most in two-story homes built 2015-2019 where the attic floor was insulated to code but never sealed. The insulation slows heat transfer but does nothing to stop air movement; conditioned air leaks out at the top plates and is replaced by attic air pulled in at the eaves, making your second floor impossible to cool efficiently.
• Dust collects rapidly around ceiling fixtures and vent grilles. That dust isn’t coming from your ducts - it’s attic air, loaded with fiberglass particles and rodent debris, being drawn through gaps around can lights and duct boots every time your HVAC cycles. We’ve photographed this phenomenon in dozens of Converse homes, and sealing the gaps stops the dust source permanently.
• Your energy bill jumps $80-$150 every summer with no rate increase. The Texas heat dome over Bexar County intensifies attic temperatures from June through September, and every unsealed gap becomes a larger leak path as the temperature differential grows. If your summer kWh usage has crept up year over year, your building envelope is degrading through air movement, not insulation failure.
• You feel drafts or temperature drops near interior walls on windy days. Wind pressurizes your attic through ridge and soffit vents, and that pressure forces air through unsealed top plates directly into your wall cavities. In Converse’s exposed new construction, we’ve measured 15°F temperature differences between sealed and unsealed wall sections during 20-mph spring winds.
• Ice dams formed on your roof during the February 2021 freeze. Ice dams require heat loss to melt snow at the roof deck; in Texas, that heat loss comes almost exclusively from warm conditioned air leaking through an unsealed attic floor and warming the underside of the roof. If you had damming or interior water damage during that event, your attic floor has significant bypasses that need sealing before the next hard freeze.

Our Attic Air Sealing Process - Step by Step

1. 1
   Initial blower-door test and thermal imaging. We pressurize your home to 50 Pascals - the industry-standard pressure differential - and measure the total air leakage in CFM50, cubic feet per minute at that pressure. A thermal imaging camera simultaneously maps the attic floor from below, showing us exactly where warm air is escaping. You receive both numbers in writing before we proceed.
2. 2
   Written scope and fixed price. Under Haven Standard Clause 1, we deliver a written scope specifying every gap, penetration, and bypass we will seal, the materials we will use, and the fixed price for the complete job. No work starts without your signature on that document. This is not an estimate that changes; it is the price you will pay.
3. 3
   Preparation and protection. Our background-checked, uniformed technicians lay protective sheeting over your floors and furniture, seal return air grilles to prevent attic debris from entering your HVAC system, and set up HEPA-filtered ventilation if we’re working in occupied spaces. You get a text when your technician is en route with a named arrival window.
4. 4
   Air sealing execution. We seal every identified bypass using the appropriate material: fire-rated caulk for top plates and small penetrations, rigid foam baffles for large openings, gasketed covers for can lights, mastic and metal tape for duct boots, and custom-built insulated hatch covers. Every sealed location is photographed for your Documented Photo Record.
5. 5
   Post-work blower-door test and documentation. We run a second blower-door test to measure the leakage reduction, then compile your complete documentation: before-and-after CFM50 readings, thermal images, photos of every sealed location, your written scope, and your 365-Day Done Right Promise warranty. This is what leaving looks like - you know exactly what was done and how it performed.

How Much Does Attic Air Sealing Cost in Converse?

Attic Air Sealing Near Converse - Our Service Area

We schedule attic air sealing throughout Converse and the surrounding Bexar County corridor with typical response times of same-day to 48 hours depending on current job volume. Our crews work regularly in Universal City, where the 1950s-1970s housing stock has different bypass patterns than Converse’s newer construction, and in Live Oak, where we see more ranch-style homes with continuous soffit venting. We also serve Windcrest, Schertz, Selma, Cibolo, Kirby, Terrell Hills, Alamo Heights, Castle Hills, and San Antonio proper - each with distinct construction eras and corresponding air-sealing challenges. From our base near Converse, most of these cities fall within a 20-minute drive, and we route crews to minimize your wait without the urgency theater of fake scheduling pressure.

Frequently Asked Questions - Attic Air Sealing in Converse

Schedule Your Attic Air Sealing Service in Converse Today

Call (830) 420-0953 now to speak with a live person - no voicemail loops, no callback windows measured in business days. We’ll schedule your free estimate at a time that works for you, deliver a written price before any work starts under Haven Standard Clause 1, and leave you with documented proof of the performance change we achieved. Whether you’re in Olympia, Woodlake, Rolling Creek, or anywhere in the 78109 ZIP, we’re ready to seal your attic right - and if you need Attic Air Sealing in Schertz, we cover that too.

Written by Wes Okafor, Owner at Topside Attic Insulation Converse, serving Converse, Attic Air Sealing - Universal City, Live Oak, and surrounding Bexar County communities since 2016.