Cooler summers, warmer winters
Attic Insulation & Air Sealing in Overland Park, KS
Most Johnson County attics are thin and leaky. We seal them and add depth.
- Free on-site estimates
- Written quote with material, depth and R-value for each area
- Attic ducts, wiring and moisture checked before we cover anything
The Attic Sets the Comfort
Attic insulation and air sealing are the foundation of a comfortable house in Overland Park. In summer the attic gets far hotter than the outdoor air, and that heat soaks down through thin insulation into the rooms below and into any ductwork that runs through the attic. In winter, warm air escapes through every gap in the ceiling. Sealing those gaps and insulating to depth helps in both seasons.
How much is enough
The Department of Energy recommends R-60 for an uninsulated attic in Climate Zone 4, which includes Johnson County, or adding R-49 where 3 to 4 inches already sit on the attic floor. Kansas has no statewide residential code, so local codes vary by city. Many attics we open in 1960s to 1980s homes have the equivalent of R-11 to R-30, often settled and uneven.
Seal first
Air moving through insulation carries heat with it. So before new insulation goes in, we seal the top plates, wire and plumbing holes, flue chases (with metal and fire-rated sealant), dropped soffits and bath fan housings. We weatherstrip and insulate the attic hatch or pull-down stairs. Recessed lights that are not rated for insulation contact get covers.
Ducts in the attic
Many homes here have ductwork in the attic. If accessible connections are leaking, sealing them keeps conditioned air where it belongs. If ducts are badly damaged or disconnected, that is HVAC work, and we tell you before we bury anything.
Blown-in or foam
On most attic floors, blown cellulose or fiberglass over a sealed ceiling is the most cost-effective path to R-49 or R-60. Foam makes more sense on vaulted ceilings, kneewalls and roof decks over finished space.
Ventilation
Attics need airflow at the soffits and the ridge or roof vents. We install baffles at the eaves so new insulation does not block the soffit vents.
Pull-down stairs and whole-house fans
A lot of Johnson County homes have pull-down attic stairs in the garage or a hallway, and some older ones have a whole-house fan in the ceiling. Both are large holes in the air barrier. Pull-down stairs can get an insulated, weatherstripped cover that lifts off when you need access. A whole-house fan can get a seasonal cover or an insulated, sealed louver. Small fixes like these often matter more than an extra inch of insulation.
Evergy rebate
Evergy's 2025 Kansas chart lists $0.15 per square foot up to $500 for R-38 ceiling insulation and $0.04 per square foot up to $300 for air sealing, for Kansas customers, through the program term ending December 31, 2027. Get a free estimate
What an Attic Job Covers
Everything that makes the attic work as a barrier.
Air sealing
Top plates, holes, chases, soffits and fixtures sealed.
Blown-in to depth
Cellulose or fiberglass to R-49 or R-60 with depth markers.
Hatch and attic stairs
Weatherstripping and insulated covers.
Eave baffles
Keeping soffit vents open.
Kneewalls
Sealing and insulating walls around upstairs rooms.
Accessible duct sealing
Sealing leaky connections we can reach.
Published Attic Costs
| Job | Range and source |
|---|---|
| Attic insulation, average job | $1,000 to $2,700, about $1,800 average (HomeGuide) |
| Air sealing | $350 to $3,000 (HomeGuide) |
| Blown-in, attic | $0.90 to $2.40 per sq ft (HomeGuide attic guide) |
| Spray foam on the attic floor | $1,100 to $6,800 (HomeGuide) |
| Spray foam on the roof deck | $1,500 to $9,000 (HomeGuide) |
| Spray foam, attic (existing home) | $2,500 to $12,000 (Fixr) |
| Old insulation removal | $1 to $2 per sq ft (HomeGuide) |
Figures from HomeGuide's January 2026 attic guide and Fixr's 2025 spray foam guide. Sealing work, depth and access change the total, and the price is what our written estimate says.
How an Attic Job Runs
1. Inspect
Depth, condition, ventilation and leaks.
2. Quote
Sealing, insulation type, depth and R-value.
3. Seal
Close the leaks.
4. Insulate
Blow or spray to the planned depth.
5. Show you
Depth markers and sealed hatch.
Why Choose Us for Attic Insulation & Air Sealing
Sealing included
It is on the quote, not an add-on.
Depth markers
You can check the depth.
Rebate-ready invoice
Areas and materials itemized.
Attic Insulation & Air Sealing Questions
Will attic insulation make my upstairs cooler?
Usually, yes, especially combined with air sealing. Upstairs rooms in two-story homes get much of their summer heat through the ceiling.
What depth is R-49?
Usually 14 to 18 inches of loose fill depending on the product.
Do I need to remove old insulation first?
Not if it is dry and clean. We add on top after sealing.
How long does an attic job take?
Most single-family attics take one day.
Do pull-down attic stairs leak much air?
Yes, an unsealed pull-down stair is one of the biggest single leaks in many homes. An insulated cover fixes most of it.
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Get an Attic Insulation & Air Sealing Estimate
Tell us about a hot upstairs or high bills. We will check the attic and send a written price.