Duct Sealing, Insulation & Solar Attic Fans in San Antonio, Fix Uneven Cooling at the Source
Mastic and Aeroseal-style duct sealing, R-38 attic insulation, solar attic fan installations, CPS Energy rebates filed for you.
Tommy's rule on duct cleaning: if the system is clean, the ductwork is clean. We do not push standalone duct cleaning as an upsell. Keeping the system on a maintenance schedule keeps the ductwork in shape downstream. If a duct cleaning is genuinely needed (post-Uri mold, after major renovation, after rodent intrusion), we run NADCA-method cleaning with before and after documentation. Otherwise: skip it. Honest answer beats a $600 service that did not need to happen.
If one room is freezing and another is hot, or the utility bill climbs every year while the AC runs longer, the answer almost always lives above the ceiling. Leaky ducts, thin attic insulation, and 140-degree attic equipment all undo the work the AC is doing.
We fix all three on the same visit: mastic and Aeroseal-style sealing on duct joints, blow-in attic insulation to R-38, and Honeywell or Nest solar attic fans. CPS Energy rebates filed on your behalf. Free duct and attic assessment first.
The Three Reasons San Antonio Homes Do Not Cool Evenly
Leaky Ducts
Losing Up to 30% of Your Cooling
Underinsulated Attic
Baking the Air Around Your Ducts
Attic-Installed Equipment
Working Against a 140-Degree Attic
Reason #1: Leaky Ducts Losing Up to 30% of Your Cooling
What you notice
One room runs cold, another runs hot. Upstairs never matches downstairs. The AC runs almost continuously but the thermostat barely reaches setpoint, and the utility bill creeps higher every year.
Why this is so common in SA
Most San Antonio homes were built with HVAC equipment and ductwork routed through the attic. Duct tape and metal-tape seals dry out, flex-duct collars loosen, and joints separate after a decade of thermal cycling. Homes here lose up to 30 percent of conditioned air into the attic before it ever reaches a register.
How we fix it
Visual inspection of every accessible joint, airflow measurement at the registers, and a plenum-to-trunk seal check. Repair uses mastic on accessible joints, code-approved metal tape where mastic is not appropriate, and Aeroseal-style aerosol sealing for runs inside walls and chases. Sealing typically pays back in two to three cooling seasons.
Reason #2: Underinsulated Attic Baking the Air Around Your Ducts
What you notice
The ceiling feels warm in the afternoon. Second-story bedrooms never cool down before bed. The AC short-cycles after sundown because the house has soaked up the day's heat. Winter bills run high too, as insulation works both directions.
Why this is so common in SA
San Antonio attics routinely hit 130 to 150 degrees during sustained summer heat. The current SA standard for attic blow-in is R-38. Pre-mid-1990s homes often have only R-19 or R-22, settled and disturbed over the years. Heat radiates straight down through that thin layer all day.
How we fix it
Tape-measure depth check at multiple points, R-value verification, and thermal-imaging spot-check under the worst areas. The fix is blow-in cellulose or fiberglass to R-38. We document the install for the CPS Energy rebate and file the paperwork.
Reason #3: Attic-Installed Equipment Working Against a 140-Degree Attic
What you notice
Lukewarm air at the supply registers in the afternoon. Supply ducts feel hot through the insulation. Equipment lifespan is shorter than your neighbors' because the air handler and ducts sit in 140-degree heat all day.
How we fix it
Two-part fix. First, a solar attic fan, both Honeywell and Nest are solar-powered with no electrical install required. Second, R-8 duct insulation on the attic-routed trunk and branches so conditioned air stays close to delivery temperature. A solar fan alone will not fix uneven cooling from leaky ducts; it ventilates, it does not seal. We scope fans as part of a comprehensive package, not a standalone upsell.
How a Duct, Insulation, and Attic Energy Visit Actually Runs
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You call (210) 897-8658 or submit the form. An Above & Beyond team member answers, no offshore call center, and asks about symptoms so we send a tech who can address that pattern. Free assessment scheduled within a few business days.
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We walk the attic, inspect duct joints and flex-duct collars, measure register airflow, depth-check insulation, and decide whether a solar attic fan would meaningfully help.
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Plain-language report with three tiers: minimum (worst leaks only), mid (full sealing plus R-8 duct insulation), and comprehensive (sealing plus duct insulation plus attic upgrade plus solar fan). We name what would meaningfully improve cooling. No upsell pressure.
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Line-itemized estimate with CPS Energy rebates and Wells Fargo 0% financing surfaced where eligible. Quote valid 90 days so you can compare second opinions without losing the price.
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Sealing alone is usually one day; sealing plus duct insulation runs one to two days; an attic-insulation upgrade adds a day. After installation, we re-measure register airflow and document before-and-after readings on the invoice. CPS Energy rebate paperwork submitted within 30 days.
What Every Duct, Insulation, and Attic Energy Visit Includes
| Service or Step | What We Do | Notes |
|---|---|---|
| Free Duct and Attic Assessment | Walk attic, inspect joints, measure register airflow, depth-check insulation. | Approximately 60 minutes, written report. |
| Mastic Duct Sealing | Hand-apply mastic on every accessible duct joint and plenum collar. | Long-life, code-approved. |
| Aerosol-Style Aeroseal Sealing | Aerosol sealant for inaccessible runs inside ceilings, walls, chases. | Polymer aerosol seals micro-leaks mastic cannot reach, best for inaccessible chase runs. |
| Code-Approved Metal Tape | Foil-backed tape on joints where mastic is not appropriate. | UL 181 listed, foil-backed; used on sheet-metal seams and plenum starts. |
| New Duct Installation | Full replacement or new-construction duct system, properly sized. | R-8 insulation standard. |
| R-6 Duct Insulation | Standard insulation for budget retrofits. | When R-8 is not required. |
| R-8 Duct Insulation | Higher R-value for attic-routed ducts. | Recommended for SA attics. |
| Blow-In Attic Insulation | Cellulose or fiberglass blow-in to R-38 SA standard. | CPS rebate eligible. |
| Honeywell Solar Attic Fan | Solar-powered attic ventilation fan, roof-mounted. | No electrical work required. |
| Nest Solar Attic Fan | Solar-powered attic ventilation fan, smart-controlled. | No electrical work required. |
| CPS Energy Rebate Filing | Document installation, file paperwork on your behalf within 30 days. | Applied at quote where eligible. |
Duct, Insulation, and Attic Energy Pricing in San Antonio
Pricing varies by home size, accessibility, existing condition, and which tier you choose. The free assessment comes first; we never quote without walking the attic.
| Service | Price Range | Notes |
|---|---|---|
| Free Duct and Attic Assessment | Free | Approximately 60 minutes on-site, written report |
| Duct Sealing | $1,500 – $4,000 | Depends on duct size and method |
| New Duct Installation | $3,000 – $5,000 | Full replacement or new build |
| R-6 Duct Insulation | Included or upcharge | Budget tier; quoted with install |
| R-8 Duct Insulation | Included or upcharge | Recommended for SA; quoted with install |
| Blow-In Attic Insulation Upgrade | Written estimate after assessment | CPS rebate applied where eligible |
| Solar Attic Fan, Honeywell | Written estimate after assessment | Solar, no electrical |
| Solar Attic Fan, Nest | Written estimate after assessment | Solar, smart-controlled |
| Aeroseal-Style Aerosol Sealing | Upper end of sealing range | Specialized equipment, longer install |
Above & Beyond Duct Services vs. National HVAC Chains
| Feature | Above & Beyond | National HVAC Chains |
|---|---|---|
| Diagnostic Approach | Static pressure measurement and Manual J and visual inspection first | Often jump to duct cleaning quote without static pressure data |
| Duct Cleaning Protocol | If the system is clean, the ductwork is clean, sell maintenance not standalone duct cleaning | Often standalone duct cleaning pushed regardless |
| Duct Sealing Method | Aeroseal or manual mastic; we measure leakage before and after for proof | Often visual seal only without leakage verification |
| Insulation Standard | R-8 attic standard, R-6 minimum; we measure attic temp before recommending | Often R-6 default regardless of attic conditions |
| Zone Control Capability | Multi-zone systems with motorized dampers and zone thermostats | Often refer-out for zoning |
| Solar Attic Fan Integration | Honeywell and Nest solar attic fans installed alongside duct work | Usually skipped |
| Static Pressure Measurement | Manometer on every estimate, proves ductwork sizing before quoting solutions | Rarely done |
| Diagnostic Pricing | $89 credited back when you approve the repair | $89 to $149 charged upfront, often not refundable |
| Free Estimate for New Duct Installation | No diagnostic fee for new install quotes | Variable |
| 30-Day Callback Warranty | Included on every duct repair or install | Variable |
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Frequently Asked Questions
How much can I really save by sealing my ducts?
Up to 30 percent of your conditioned air is currently escaping into the attic per the SA average. Most customers see a measurable drop in the summer cooling bill within one to two billing cycles, plus evenly cooled rooms. Payback is typically two to three cooling seasons.
What is the difference between R-6 and R-8 duct insulation?
R-8 has roughly 33 percent more thermal resistance. For SA attic-routed ducts sitting in 130 to 150 degree heat, R-8 is the recommended standard. R-6 is acceptable for budget retrofits in conditioned space.
Is R-38 attic insulation really the SA standard?
Yes. Pre-mid-1990s homes commonly have R-19 or R-22, and that layer has usually settled. Upgrading to R-38 cuts radiant heat into the living space and pays back both summer and winter.
How do solar attic fans work, and do they need electrical wiring?
A solar attic fan is a roof-mounted ventilation fan powered by a built-in solar panel. It ventilates hot attic air during peak sun hours. No electrical wiring required. We install Honeywell or Nest brand.
Do you handle the CPS Energy rebate paperwork?
We file it on your behalf within 30 days of install. CPS Energy rebates are applied to the written estimate up front where eligibility is clear, so you see the net price before signing.
Ready to Book Your Duct Services? Call Above & Beyond Today
A real San Antonio team member answers, never a phone tree. Free written estimate before any work. TDLR Class A licensed, $20M general liability, 30 years in the SA trade.
(210) 897-8658
Same-Day Capacitor Replacement
Monday through Friday: 7:00 AM to 7:00 PM | Saturday: 8:00 AM to 5:00 PM | Sunday: Emergency Dispatch Only | After-Hours Emergencies: 24/7, call (210) 837-1466