Blown-In Insulation Cost - Same-Day Service, Done Right the First Time

How Much Does Blown-In Insulation Cost in Converse?

Blown-In Insulation services in Converse, TX typically cost between $1,400 and $3,200 for a standard attic, depending on square footage, current insulation depth, and whether air sealing is completed first. Most homeowners in Converse with a 1,500-to-2,200 square foot home land somewhere between $1,600 and $2,500 when the job is scoped correctly and priced in writing before anyone touches a blower hose. At Envelope Insulation Co. – operating here as Topside Attic Insulation Converse – every job starts with a flat written price and ends with a documented photo record, so you know the exact number before any work starts.

Blown-In Insulation Cost Breakdown (2026)

The table below reflects current material and labor pricing in the Converse, TX market as of 2026. These are real ranges – not ballpark figures designed to get you on the phone – because a written price before any work starts is how we operate under the Haven Standard.

What Drives the Final Number Up or Down

Three things move the price more than anything else in Converse: the current R-value already sitting in the attic, whether the attic floor has been properly air-sealed, and how accessible the attic is for a blower hose and crew.

Homes built in Converse before 2000 – and there are a lot of them along Kitty Hawk Road and in the Converse Meadows and Salado Springs subdivisions – frequently have R-11 or R-19 batts laid flat with no additional blown fill on top. Getting those homes to R-38 (the current Bexar County / San Antonio metro code recommendation for climate zone 2B) requires significantly more material than topping off an attic that’s already sitting at R-25. That gap in starting point is the single biggest cost variable we see job to job.

Air sealing is not optional at Envelope Insulation Co. We don’t blow insulation over an unsealed attic floor. Every can light, top plate, plumbing penetration, and HVAC boot gets sealed before a single cubic foot of cellulose or fiberglass touches the deck. That step adds to the upfront cost, but it’s the reason the before-and-after blower-door numbers we document on every applicable job actually move – and why the energy savings show up on the utility bill rather than staying in the estimate.

Cellulose (GreenFiber is one of the brands we use) runs slightly less per bag than fiberglass (Johns Manville, Owens Corning, Knauf) in this market, but the settled depth requirements differ, so cost per square foot at target R-value ends up close. Rockwool and CertainTeed products are used where fire resistance or specific density is a priority. We don’t push any single product – the scope dictates the material.

What Affects Blown-In Insulation Pricing in Converse

• Current insulation depth and condition: An attic in Converse that’s sitting at R-8 because the original batts have compressed over two decades in the Texas heat costs more to bring to code-recommended levels than one starting at R-22. Compressed or moisture-damaged insulation sometimes needs to come out entirely before new material goes in, which adds a removal line item to the job.
• Attic square footage and geometry: A straightforward rectangular attic in a 1,800 square foot single-story home on Converse’s north side near JBSA-Randolph is faster to insulate than a two-story home with multiple roof pitches, knee walls, and hard-to-reach eave pockets. Geometry affects labor hours, and labor hours affect price.
• Air sealing scope required: Older Converse homes – particularly anything built before 2005 – often have recessed can lights installed without gaskets and top plates with open cavities that connect the living space directly to the attic. Sealing all of those penetrations properly takes time and affects the total cost of the job, but skipping it makes the blown-in insulation less effective. We complete air sealing before insulation, always.
• Material type selected: Blown fiberglass and blown cellulose are priced similarly in the Converse market, with cellulose generally running 5-10% less per bag. Spray foam (Icynene or Demilec open-cell is common here) used to fill specific penetrations or low-slope areas costs more per square foot but is used surgically, not as a blanket solution.
• Attic access and temperature: Summer attic temperatures in Converse routinely reach 140-150 degrees Fahrenheit. Jobs scheduled in July and August require more crew rotation and take longer, which is sometimes reflected in pricing. Spring and late fall are typically the fastest-to-schedule and most straightforward windows for this work.
• Removal of existing material: If the current insulation is contaminated – rodent waste, mold, or asbestos in homes built before 1978 – it has to come out before anything goes in. Removal, bagging, and disposal is a separate line item that runs between $1.00 and $2.50 per square foot in the Converse market depending on contamination level and material type.

Before

After

Converse-Specific Factors Worth Knowing

Converse sits in Bexar County and falls within the City of San Antonio’s ETJ (extraterritorial jurisdiction) in some sections, which means building permits and inspection requirements can vary by address. Blown-in insulation added to an existing attic typically does not require a permit in unincorporated Converse, but any scope involving structural modification or full replacement in a permitted work zone is worth verifying with the county before starting. We provide written documentation of the scope completed on every job – photos, materials used, depths achieved – which satisfies most HOA and real estate disclosure requirements in this area.

The soil in this part of Bexar County is also worth mentioning. Converse homes sit on expansive clay soil that shifts seasonally, and foundation movement over time can open gaps at the top plates of exterior walls. Those gaps – where the framing meets the ceiling drywall – are among the most common air leak points we find on blower-door tests in this market. Sealing them before blowing insulation is not optional; it’s why the blower-door numbers actually move after the job is done.

Homes in Converse Park, Coronado Village, and the older sections of Converse near Loop 1604 that were built in the late 1980s and early 1990s often have original fiberglass batts with no blown fill on top. Those batts shift and compress, leaving cold-roof gaps that show up as hot ceilings in summer and elevated utility bills year-round. A blower-door test – a pressurization reading that shows, in one number, how much air the building envelope is losing – typically reads 4,000 to 6,000 CFM50 in homes like this before sealing. After air sealing and blown-in insulation, we regularly see those numbers drop to 2,000 to 3,500 CFM50. That’s the documented performance change the homeowner actually paid for, and it’s what we record and leave with every applicable job.

How to Save on Blown-In Insulation in Converse

Get a Written Scope Before You Agree to Anything

The single most effective way to avoid overpaying is to get a flat written price covering a specific scope before any work starts. A quote that says “attic insulation, approximately $X” without naming the square footage, the target R-value, the material, and whether air sealing is included is not a quote – it’s an opening number. Under Haven Standard Clause 1, Envelope Insulation Co. provides a written price and a written scope before anyone lifts a tool. If another contractor won’t put it in writing to the same level of detail, that’s worth knowing before you sign.

Use Our Free Second Opinion

If you’ve already received a written estimate from another insulation contractor in the Converse area, bring it to us. We’ll read it with you – line by line – and tell you whether the scope is complete, whether the R-value target is appropriate for your home’s square footage and climate zone, and whether the price is in line with the current Converse market. This is not a sales meeting; it’s a second set of eyes on a document that’s going to cost you real money. There’s no charge for that conversation.

Bundle Air Sealing and Insulation Together

Scheduling attic air sealing and blown-in insulation as a single job – rather than returning for a second visit – reduces labor costs because the crew is already in the attic and the setup is already done. The savings are real: bundling these two scopes together typically costs 10-15% less than pricing them separately. More to the point, insulation installed over an unsealed attic floor performs measurably worse – the air sealing is what makes the insulation work the way the R-value on the bag suggests it will.

Time the Job for Spring or Fall

Demand for insulation work in Converse spikes in June and July when homeowners get their first summer utility bills and again in November when the first cold front arrives. Scheduling in March, April, or October typically means faster availability and, in some cases, slightly better pricing because crew time is easier to fill during shoulder season.

Check for Available Utility Rebates

CPS Energy – the electric and gas utility serving most of Converse – periodically offers rebates for insulation upgrades that bring attics to R-38 or higher. The availability and amount of those rebates changes year to year. It’s worth checking CPS Energy’s current program before you schedule, because a rebate doesn’t reduce our price (we price to the scope), but it reduces your net cost after the job is done. We can point you toward the right program category when we scope the job.

For a free written estimate on your Converse home, call Topside Attic Insulation Converse at (830) 420-0953. A live person answers – no voicemail loop, no callback window.

FAQs – Blown-In Insulation Cost in Converse, TX

How much does blown-in insulation cost for a 1,500 square foot attic in Converse?

A 1,500 square foot attic in Converse typically costs between $1,300 and $1,900 for blown-in insulation alone, or between $1,800 and $2,600 when attic air sealing is included first. The lower end applies when the existing insulation is in reasonable condition and simply needs to be topped up to R-38. The upper end applies when penetrations are numerous, access is difficult, or a meaningful amount of existing material needs to come out first. Call (830) 420-0953 for a written price specific to your home’s attic – the estimate is free and the number is flat before anyone starts.

Is blown-in insulation or batt insulation cheaper in Converse?

Blown-in insulation is generally 10-20% less expensive per square foot than batt insulation for attic applications in Converse, and it performs better because it fills irregular framing gaps and settles into corners that cut batts can’t reach cleanly. For attic floors, blown-in (cellulose or fiberglass) is the standard choice in this climate. Batts are sometimes used in specific wall or knee-wall applications but are rarely the right call for a standard open attic floor. Call (830) 420-0953 and we’ll tell you which material fits your specific attic configuration and why.

Do I need a permit for blown-in insulation in Converse, TX?

In most cases, adding blown-in insulation to an existing Converse attic does not require a permit from Bexar County or the City of San Antonio. The exception is work involving structural changes, electrical modifications, or full removal and replacement in a home that’s part of a permitted renovation project. We recommend confirming with Bexar County’s development services office if your project is part of a larger permitted scope. Either way, every job we complete includes a documented photo record and a written scope – documentation that covers most HOA disclosure and real estate requirements in the Converse market.

How long does blown-in insulation last in Converse’s climate?

Blown-in cellulose and fiberglass insulation in a properly sealed Converse attic typically lasts 20 to 30 years before settling causes a meaningful drop in effective R-value. The Texas heat accelerates settling somewhat compared to cooler climates, which is why reaching R-38 to R-49 (rather than the minimum code floor) gives you a longer performance window before a top-up is needed. Material life is also significantly affected by moisture – an attic with an unsealed duct joint or a roofing issue that introduces condensation will degrade insulation faster than heat alone. That’s another reason air sealing and a thorough attic inspection precede every installation we do.

Does blown-in insulation actually lower electric bills in Converse?

Yes, measurably – but only when the air sealing is done correctly alongside the insulation. On jobs in Converse where we complete a blower-door test before and after, we routinely see air leakage drop from the 4,000-6,000 CFM50 range (common in pre-2005 homes in this market) to the 2,000-3,500 CFM50 range after sealing and insulation. Homeowners in similar homes have reported 15-30% reductions in cooling costs during the first full summer after work is completed, though results vary by home age, HVAC condition, and occupancy patterns. We document the blower-door numbers on every applicable job so you’re comparing a real before-and-after figure – not an estimate from a spreadsheet. Call (830) 420-0953 to talk through what a blower-door test on your specific home would show before any work is scoped.

What’s included in Topside Attic Insulation Converse’s blown-in insulation service?

Every blown-in insulation job we complete in Converse includes a written price and written scope before work starts, attic air sealing (top plates, can lights, plumbing and electrical penetrations) completed before insulation is installed, installation of blown-in material to the target R-value, a documented photo record at job close, and – on applicable jobs – before-and-after blower-door readings so you can see the performance change in a single number. The 365-Day Done Right Promise applies to all completed work: if it’s not done right, we make it right. That promise is backed by the written warranty you receive before the job starts, not after.

Key Takeaways

• Blown-in insulation in Converse runs $1,400 to $3,200 for most attic jobs, with the most common scope (1,500-2,000 sq ft, air sealing included) landing between $1,800 and $2,600.
• Air sealing before insulation is not optional – it’s what makes the R-value on the bag reflect the R-value in your ceiling.
• Before-and-after blower-door numbers are documented on every applicable job so you have a measured record of what changed.
• Homes in Converse built before 2005 – particularly in Converse Park, Converse Meadows, and the Salado Springs area – frequently have compressed original batts with no blown fill, meaning they’re under-performing significantly relative to current code recommendations.
• A written price, written scope, and written warranty are provided before any work starts – Haven Standard Clause 1, no exceptions.
• The 365-Day Done Right Promise covers all completed work.
• Estimates are free and prices are flat – call (830) 420-0953 to schedule.

Ready to Get a Written Price for Your Converse Home?

Topside Attic Insulation Converse has been completing blown-in insulation jobs across Converse and the surrounding Bexar County area since 2016 under The Haven Standard – which means every job we do in Converse begins with a flat written price and ends with a documented photo record. Wes Okafor leads the operation, and Wes has built the company around a single rule: the scope is written before anyone lifts a tool, and the warranty is written before the crew leaves.

If you’re trying to decide whether blown-in insulation in Converse is the right call for your home, or you’ve already received a quote from another contractor and want a free second opinion on it, call us at (830) 420-0953. A live person will answer. No voicemail loop, no callback window measured in business days. We’ll tell you what we’d find in your attic, what it would cost to fix it, and put that number in writing before we ask for anything else.

You can also learn more about our full range of building-envelope services on our home page, including attic air sealing, radiant barrier installation, spray foam insulation, crawl space encapsulation, and home energy audits – all scoped and priced the same way.

Pricing reflects the Converse, TX market as of 2026. Topside Attic Insulation Converse offers free estimates – call (830) 420-0953.

Written by Wes Okafor, Owner at Envelope Insulation Co. – Topside Attic Insulation Converse, serving Converse, TX since 2016.