Air Sealing in Arkansas
Drafty rooms, uneven temperatures, and a power bill that doesn’t match how new your HVAC is usually trace back to the same thing: air moving through your house where it shouldn’t. A blower door test finds it. Sealing it stops it.
The short answer
Air sealing is closing the unintentional gaps, cracks, and penetrations throughout a house’s envelope — not just the attic, but rim joists, window and door trim, outlets, plumbing and wire penetrations, and duct connections — that let conditioned air escape and outside air (and humidity) leak in. A blower door test quantifies exactly how leaky a house is and pinpoints where the air is moving, which is why a real energy audit starts there instead of guessing. Whole-house sealing typically runs $600–$2,500 depending on the home’s size and leakage, and it’s consistently one of the highest-return improvements available before spending more on insulation or HVAC upgrades.
That’s the summary. Below is what a blower door test and energy audit actually measure, where drafts hide beyond the attic, how the sealing gets done, and what it costs in Arkansas.
What air sealing actually covers
“Air sealing” gets used as shorthand for attic work because that’s often where the biggest single leaks are, but a house loses conditioned air through its entire envelope — foundation to roofline. Whole-house air sealing treats the building as one connected system instead of stopping at the attic floor.
If your attic has already been sealed and you’re still feeling drafts, uneven rooms, or a musty crawl space smell drifting upstairs, the leaks are somewhere else — rim joists, window trim, exterior outlets, or the crawl space itself. See our attic air sealing page if the attic specifically is what you’re after; this page covers the rest of the house.
Done right, it’s targeted work at specific gaps — spray foam, caulk, and weatherstripping at the exact points where the air barrier is broken — guided by measurement, not a walkthrough guess.
Blower door testing & energy audits
A blower door is a calibrated fan that temporarily mounts in an exterior doorway and depressurizes the house, pulling outside air in through every gap in the envelope. With the house under negative pressure, a tech can walk the interior and literally feel — or measure with a smoke pencil and infrared camera — exactly where air is entering.
The test also produces a number: air changes per hour (ACH50), a standardized measure of how leaky the house is at 50 pascals of pressure. That number is what turns “this house feels drafty” into a documented before-and-after, and it’s the difference between a real energy audit and a sales walkthrough.
A full energy audit builds on the blower door test with a visual inspection of insulation levels, ductwork condition, and combustion appliance safety — because tightening a house changes how it breathes, and venting needs to be checked alongside the sealing.
Where drafts actually come from
Beyond the attic, these are the leak points a blower door test turns up most often in Arkansas homes:
Vented crawl spaces compound the problem — humid outside air pulled in through crawl space vents rises through the floor and rim joist gaps into the living space. See our crawl space encapsulation guide for how that end of the house gets sealed.
How the job actually gets done
- Blower door test — establishes a baseline ACH50 number and locates leaks with the house under pressure
- Prioritize by impact — rim joists, top plates, and duct leakage typically move the needle more than any single outlet or trim gap
- Seal with the right material for the gap — spray foam for rim joists and larger penetrations, fire-rated caulk near combustion sources, foam gaskets behind outlet covers
- Address duct leakage where testing shows it, since a leaky return can undo sealing done everywhere else
- Re-test with the blower door to confirm the ACH50 improvement and document the result
A before-and-after blower door number is the one piece of proof that separates real air sealing from a crew that caulked whatever was visible and called it done.
What air sealing costs in Arkansas
Priced by scope and the number of leak points found during testing, not a flat square-footage rate. A blower door test alone runs $250–$450; whole-house sealing typically lands between $600 and $2,500.
| Scope | Typical range | Notes |
|---|---|---|
| Blower door test / energy audit only | $250–$450 | Diagnostic; often credited toward sealing work if you proceed |
| Rim joist sealing | $400–$1,200 | Depends on crawl space or basement perimeter length |
| Whole-house air seal (rim joist, penetrations, outlets, trim) | $600–$2,500 | Most common scope; excludes attic-specific work |
| Whole-house seal + attic top-plate sealing | $1,200–$3,500 | See the attic air sealing page for that portion |
A quote for “air sealing” with no blower door number attached — before or after — is worth questioning; ask what ACH50 the house is testing at now and what improvement is expected. See the full 2026 pricing guide for how this fits into a broader project budget.
Where air sealing can go wrong
A tighter house is a good goal, but sealing without checking the rest of the system creates its own problems.
See where spray foam can go wrong for the broader set of install-stage considerations that apply anywhere foam is used for sealing.
Common air sealing questions
Want to know your house’s actual ACH50 number? Free on-site estimates include a walkthrough.
Find out where your house is actually leaking
Free on-site estimates across Arkansas, with a blower-door-guided walkthrough so you know exactly what’s driving your energy bill before you spend a dollar on sealing.